Engineers requiring balanced mechanical performance with excellent machinability frequently specify 80-55-06 ductile iron for medium-duty industrial components. This comprehensive guide examines the 80-55-06 material properties, international 80-55-06 ductile iron equivalent grades, and 80-55-06 ductile iron machinability characteristics that make it a practical choice for applications demanding reliable strength with efficient manufacturing capability.
Industry professionals value 80-55-06 ductile iron for several compelling technical advantages:
- Minimum 80,000 psi tensile strength delivers substantial load-bearing capacity for general engineering applications
- Excellent machinability from ferritic-pearlitic microstructure enables faster cutting speeds and extended tool life
- Balanced hardness (170-270 HB) provides adequate wear resistance while maintaining workability
- Superior damping capacity reduces vibration in rotating machinery and structural applications
- Proven reliability in automotive components, hydraulic housings, and industrial machinery parts
- Cost-effective alternative to steel forgings offering 50-100% faster machining speeds
Engineers who understand 80-55-06 ductile iron properties, ASTM A536 80-55-06 specifications, and 80-55-06 ductile iron equivalent standards can optimize component design and achieve reliable performance across diverse industrial applications.
Key Takeaways
- 80-55-06 delivers minimum 80,000 psi tensile strength with 6% elongation for balanced strength and ductility
- The material composition includes controlled carbon, silicon, and residual magnesium for consistent nodularization
- International 80-55-06 ductile iron equivalent grades include ISO 1083 500-7, EN-GJS-600-3, and QT600-3 (China)
- 80-55-06 material properties include 55,000 psi yield strength with hardness 170-270 HB
- The ferritic-pearlitic matrix provides superior machinability exceeding comparable carbon steels
- Applications include crankshafts, brake components, hydraulic manifolds, and structural brackets
- Selecting experienced ductile iron casting foundries ensures consistent ASTM 80-55-06 quality
What Is 80-55-06 Material?
80-55-06 material is a medium-strength ductile iron grade with minimum 80,000 psi tensile strength, featuring balanced ferritic-pearlitic microstructure that delivers reliable mechanical properties with exceptional manufacturing efficiency.
Material Classification
80-55-06 follows the American designation system established by ASTM A536, the standard specification for ductile iron castings. The nomenclature provides immediate performance identification: the first number “80” represents minimum tensile strength of 80,000 pounds per square inch, the second number “55” indicates minimum yield strength of 55,000 psi, and the final number “06” denotes minimum 6% elongation.
This standardized designation eliminates confusion during component specification. Engineers reference ASTM A536 80-55-06 consistently regardless of supplier location, facilitating reliable procurement and quality verification across manufacturing facilities.
Microstructure Characteristics
The balanced performance characteristics of 80-55-06 ductile iron stem from its carefully controlled microstructure. Molten iron receives precise magnesium treatment, causing graphite to precipitate in spheroidal nodules throughout the metallic matrix rather than flakes characteristic of gray iron. These graphite nodules distribute uniformly at 100-300 nodules/mm², creating the ductility and machinability distinguishing this material.
The metallic matrix surrounding graphite nodules consists of mixed ferritic-pearlitic structure in 80-55-06 material. This combination provides balanced 80,000 psi tensile strength with exceptional machinability. The typical matrix composition ranges from 60-80% ferrite with 20-40% pearlite, differentiating 80-55-06 from higher-strength grades containing predominantly pearlitic structures.
| Microstructure Component | Typical Content | Contribution to 80-55-06 Properties |
|---|---|---|
| Spheroidal Graphite | 10-12% by volume | Superior machinability, damping capacity |
| Ferrite | 60-80% | Excellent ductility, formability |
| Pearlite | 20-40% | Adequate strength, moderate hardness |
| Nodule Count | 100-300/mm² | Property uniformity, consistent performance |
The spheroidal graphite acts as internal lubricant during machining operations, explaining the material’s exceptional machinability advantage. The balanced ferritic-pearlitic matrix delivers reliable tensile strength while maximizing manufacturing efficiency through reduced cutting forces and extended tool life.
80-55-06 Material Composition
The composition includes 3.0-3.9% carbon, 1.8-2.8% silicon, 0.2-0.8% manganese, and critical residual magnesium 0.03-0.06% ensuring spheroidal graphite formation for balanced 80,000 psi strength with excellent machinability.
Understanding material composition provides critical insight into 80-55-06 ductile iron properties and processing behavior. Each element serves specific purposes achieving the balanced ferritic-pearlitic microstructure required for reliable performance.
Primary Alloying Elements
Carbon (C): 3.0-3.9%
Carbon content directly determines graphite quantity in 80-55-06 material. This controlled range enables excellent casting fluidity while providing sufficient graphite volume for superior machinability. The carbon level influences ferrite-to-pearlite ratio, with moderate carbon content supporting balanced matrix structure delivering 80,000 psi tensile strength.
The carbon equivalent (CE = %C + %Si/3) typically ranges from 4.2 to 4.5 for optimal 80-55-06 ductile iron properties. Foundries monitor carbon content precisely during melting to maintain consistent mechanical performance and machinability characteristics.
Silicon (Si): 1.8-2.8%
Silicon acts as a graphitizing element promoting spheroidal graphite formation during ductile iron production. The silicon range in 80-55-06 composition balances graphitization with ferrite promotion. Controlled silicon content maintains balanced ferritic-pearlitic matrix structure, optimizing machinability while ensuring adequate strength.
Silicon also improves casting fluidity and reduces shrinkage tendencies. The silicon level directly influences final microstructure, affecting both 80-55-06 material properties and manufacturing characteristics. Moderate silicon content promotes uniform nodule distribution while maintaining excellent machinability.
Manganese (Mn): 0.2-0.8%
Manganese contributes to pearlite formation and strength enhancement in 80-55-06 composition. Controlled manganese addition provides adequate strength without excessive hardness that would compromise machinability. The moderate manganese content balances strength requirements with manufacturing efficiency.
Manganese also improves hardenability and stabilizes carbides when heat treatment enhancement proves necessary for specific applications. The controlled addition maintains the ferritic-pearlitic balance characteristic of ASTM A536 80-55-06 material.
Magnesium (Mg): 0.03-0.06% (residual)
Magnesium represents the critical element transforming gray iron into ductile iron. Magnesium treatment modifies graphite morphology from flakes to spheroids, fundamentally changing mechanical behavior and machinability. 80-55-06 composition requires precise residual magnesium content maintaining nodular graphite structure throughout production.
Foundries add magnesium through ladle treatment methods using ferrosilicon-magnesium alloys. Residual content measuring 0.03-0.06% after reaction ensures consistent nodularization. Precise magnesium control remains critical for consistent 80-55-06 ductile iron properties and superior machinability characteristics.
Impurity Control
Phosphorus (P): <0.08%
Phosphorus creates brittleness by forming iron phosphide eutectic at grain boundaries. The phosphorus limit prevents excessive steadite formation that would reduce ductility and impact resistance. Raw material selection controls phosphorus input, ensuring specification compliance.
Sulfur (S): <0.03%
Sulfur content requires strict control during 80-55-06 production. Sulfur interferes with nodularization by consuming magnesium needed for graphite spheroidization. The low sulfur specification ensures efficient magnesium utilization and consistent nodule quality essential for reliable material properties.
80-55-06 Ductile Iron Properties
80-55-06 ductile iron properties include minimum 80,000 psi tensile strength, 55,000 psi yield strength, 6% elongation minimum, and hardness 170-270 HB, delivering balanced load-bearing capacity with excellent manufacturing efficiency.
The mechanical properties defined by ASTM A536 80-55-06 specification determine suitability for medium-duty applications. Comprehensive understanding enables accurate design calculations and appropriate component specification.
Tensile Properties
Tensile Strength (Rm): ≥80,000 psi / 552 MPa (typical 85,000-95,000 psi)
Tensile strength represents the primary defining characteristic of 80-55-06 ductile iron. The minimum value of 80,000 psi provides substantial load-bearing capability for general engineering applications. Typical production material often achieves 85,000-90,000 psi when foundries maintain rigorous process control and optimize the ferritic-pearlitic microstructure.
The tensile strength depends primarily on pearlite content and nodule characteristics. The balanced ferritic-pearlitic matrix (60-80% ferrite, 20-40% pearlite) provides reliable strength approaching low-carbon steel levels while maintaining superior machinability. Testing procedures follow ASTM A536 standards using separately cast test bars ensuring consistent evaluation conditions.
Yield Strength (Rp0.2): ≥55,000 psi / 379 MPa (typical 58,000-65,000 psi)
Yield strength indicates stress level where permanent deformation begins. 80-55-06 material exhibits yield behavior at minimum 55,000 psi, providing substantial design safety margin for general engineering applications. Typical yield strength measures 58,000-65,000 psi for well-controlled production.
The yield-to-tensile ratio typically ranges from 0.65 to 0.75, indicating excellent ductility reserves. This characteristic enables significant energy absorption during overload without immediate fracture, making 80-55-06 suitable for applications experiencing variable loading conditions.
Elongation (A): ≥6% (typical 6-10%)
The elongation of 80-55-06 ductile iron reaches minimum 6%, representing balanced ductility appropriate for components requiring both strength and formability. Elongation values typically range from 6% to 10%, depending on ferrite content and section thickness. The balanced ferritic-pearlitic matrix provides adequate strength with excellent ductility for general applications.
The moderate ductility reflects 80-55-06’s optimization for balanced performance rather than maximum strength or elongation extremes. Engineers specify 80-55-06 for applications requiring reliable strength with adequate toughness for variable operating conditions.
| Property | 80-55-06 Value | Test Standard |
|---|---|---|
| Tensile Strength (Rm) | ≥80,000 psi / 552 MPa | ASTM A536 |
| Yield Strength (Rp0.2) | ≥55,000 psi / 379 MPa | ASTM A536 |
| Elongation (A) | ≥6% (typical 6-10%) | ASTM A536 |
| Brinell Hardness (HB) | 170-270 HB | ASTM A536 |
Hardness Characteristics
Brinell Hardness: 170-270 HB (typical 200-240 HB)
Hardness measurements provide rapid verification of 80-55-06 material properties. The Brinell hardness range reflects the balanced ferritic-pearlitic microstructure distinguishing 80-55-06 from higher-strength grades. Values of 200-240 HB indicate optimally controlled material with balanced strength and machinability.
The moderate hardness range provides adequate wear resistance for general applications while maintaining excellent machinability. Components operating in moderate abrasive conditions benefit from this balance between workability and durability.
Physical Properties
Density: 0.256 lb/in³ / 7.1 g/cm³
The density of 80-55-06 ductile iron remains consistent across composition variations, enabling accurate weight calculations during design. 80-55-06 density closely approximates steel (0.283 lb/in³), providing approximately 10% weight savings for equivalent volumes while delivering comparable strength.
Modulus of Elasticity: 24-25 million psi / 165-172 GPa
The elastic modulus of 80-55-06 material properties approaches steel’s modulus (29-30 million psi). This relatively high stiffness makes 80-55-06 suitable for applications requiring structural rigidity. Engineers must account for the slightly lower modulus versus steel when calculating deflection under load.
Thermal Properties
Thermal Conductivity: 28-31 W/(m·K)
80-55-06 material conducts heat moderately, providing adequate thermal dissipation for most applications. The spheroidal graphite structure enables reasonable thermal conduction while the ferritic matrix enhances heat transfer compared to pearlitic grades.
Coefficient of Thermal Expansion: 10.5-11.0 × 10⁻⁶/K
The thermal expansion coefficient matches carbon steel values closely. This compatibility minimizes thermal stress when assembling 80-55-06 components with steel parts, preventing loosening or binding across temperature ranges encountered in service.
Performance Characteristics
80-55-06 demonstrates balanced wear resistance adequate for moderate-duty applications. The ferritic-pearlitic matrix provides reasonable abrasive resistance while maintaining excellent impact resistance from 6% minimum elongation. Impact testing typically shows values of 10-20 Joules at room temperature, substantially exceeding higher-strength grades.
The material exhibits superior damping capacity compared to steel, reducing vibration transmission in rotating machinery and structural applications. This characteristic makes 80-55-06 particularly valuable for components requiring vibration control.
80-55-06 Ductile Iron Machinability
80-55-06 ductile iron machinability exceeds comparable carbon steels by 50-100% in cutting speed, with 2-3 times extended tool life due to the internal lubrication provided by spheroidal graphite nodules within the ferritic-pearlitic matrix.
The exceptional machinability represents a primary advantage of 80-55-06 ductile iron for manufacturing applications. The material’s unique microstructure enables significant production efficiency improvements compared to steel alternatives.
Machining Performance Advantages
Cutting Speed: 50-100% Faster Than Equivalent Steel
80-55-06 ductile iron machinability enables substantially higher cutting speeds than comparable-strength carbon steels. The spheroidal graphite nodules act as internal chip breakers and provide continuous lubrication during cutting operations. Typical cutting speeds range from 400-800 surface feet per minute for turning operations, compared to 250-400 sfpm for equivalent steel grades.
The ferritic-pearlitic matrix machines cleanly with minimal cutting forces. Higher cutting speeds translate directly to reduced cycle times and increased production throughput for high-volume manufacturing operations.
Tool Life: 2-3 Times Longer Than Carbon Steel
Extended tool life represents a significant economic advantage of 80-55-06 material. The graphite nodules reduce cutting tool wear by minimizing friction at the tool-chip interface. Carbide and high-speed steel tooling typically achieve 2-3 times longer service intervals compared to machining equivalent-strength steel.
The reduced tool wear lowers manufacturing costs through decreased tool replacement frequency and reduced machine downtime for tool changes. Production facilities benefit from improved manufacturing economics across high-volume component production.
Surface Finish: Excellent Finish Capability
80-55-06 ductile iron produces excellent surface finishes with standard machining practices. Surface roughness values of 32-63 Ra are readily achievable using conventional turning, milling, and drilling operations. The material’s microstructure enables clean chip formation without work hardening or built-up edge formation common with some steel grades.
The capability to achieve superior surface finishes reduces or eliminates secondary finishing operations, further enhancing manufacturing efficiency and reducing production costs.
Chip Formation: Short, Manageable Chips
The graphite nodules promote short, easily controlled chip formation during machining. Short chips evacuate readily from cutting zones, preventing chip wrapping around tooling or workpieces. This characteristic reduces machine operator intervention and minimizes production interruptions from chip management issues.
Recommended Machining Practices
Tooling Selection
Standard carbide and high-speed steel cutting tools perform excellently with 80-55-06 ductile iron machinability characteristics. Uncoated carbide grades C2-C6 or TiN-coated carbide provide optimal performance. High-speed steel tools (M2, M7) work effectively for lower-speed operations and specialized tooling applications.
Positive rake angle geometry (5-15°) improves chip evacuation and reduces cutting forces. Sharp cutting edges maintain clean cutting action without excessive work hardening of the surface.
Cutting Parameters
Recommended cutting speeds range from 400-800 sfpm for carbide tooling and 150-300 sfpm for high-speed steel tools. Feed rates of 0.010-0.030 inches per revolution balance productivity with surface finish requirements. Depth of cut selections depend on component geometry and rigidity, with roughing cuts of 0.100-0.300 inches commonly employed.
Coolant Application
Adequate coolant flow provides heat dissipation and chip evacuation during machining operations. Water-soluble synthetic coolants or semi-synthetic emulsions work effectively with 80-55-06 material. Sufficient coolant volume prevents thermal damage to workpieces and extends cutting tool life through temperature control.
Machinability Comparison
| Material | Relative Machinability Rating | Typical Cutting Speed (sfpm) | Tool Life Factor |
|---|---|---|---|
| 80-55-06 Ductile Iron | 100% (reference) | 400-800 | 1.0x (reference) |
| 1045 Carbon Steel | 50-65% | 250-400 | 0.3-0.5x |
| 4140 Alloy Steel | 40-55% | 200-350 | 0.3-0.4x |
| Cast Steel | 45-60% | 225-375 | 0.4-0.5x |
The superior 80-55-06 ductile iron machinability provides substantial manufacturing advantages over steel alternatives, particularly for complex components requiring extensive machining operations.
80-55-06 Ductile Iron Equivalent Grades
The 80-55-06 ductile iron equivalent includes ISO 1083 JS/500-7 (International), EN-GJS-600-3 (European), QT600-3 (Chinese), and FCD600 (Japanese) standards, representing balanced medium-strength grades across international specifications.
Understanding international equivalent grades enables global sourcing and ensures design compatibility across markets. The 80-55-06 ductile iron equivalent system facilitates international procurement and technical communication.
International Standard
ISO 1083 JS/500-7
The International Organization for Standardization designates equivalent material as ISO 1083 JS/500-7. The “JS” indicates spheroidal graphite iron, “500” represents minimum tensile strength in megapascals (approximately 72,500 psi), and “7” denotes minimum elongation percentage. This international standard provides unified specifications facilitating global component sourcing.
ISO 1083 JS/500-7 specifications:
- Tensile strength minimum: 500 MPa (72,500 psi)
- Yield strength minimum: 320 MPa (46,400 psi)
- Elongation minimum: 7%
- Predominantly ferritic matrix
European Standard
EN-GJS-600-3 (EN 1563)
The modern European designation for 80-55-06 equivalent is EN-GJS-600-3, where “GJS” indicates spheroidal graphite iron, “600” represents minimum tensile strength in MPa (87,000 psi), and “3” denotes minimum elongation percentage. This standard harmonized earlier national standards including DIN 1693 (Germany).
EN-GJS-600-3 specifications:
- Tensile strength minimum: 600 MPa (87,000 psi)
- Yield strength minimum: 370 MPa (54,000 psi)
- Elongation minimum: 3%
- Brinell hardness: 170-270 HB
The European specification shows slightly higher tensile minimum with lower elongation compared to ASTM specification, though production material typically meets both standards simultaneously.
Chinese Standard
QT600-3 (GB/T 1348)
Chinese national standard GB/T 1348 designates equivalent material as QT600-3. The “QT” represents ductile iron, “600” indicates minimum tensile strength in MPa, and “3” represents minimum elongation percentage. Chinese foundries produce QT600-3 extensively for automotive components, hydraulic systems, and general machinery applications.
QT600-3 specifications:
- Tensile strength minimum: 600 MPa (87,000 psi)
- Yield strength minimum: 370 MPa (54,000 psi)
- Elongation minimum: 3%
- Brinell hardness: 170-270 HB
Japanese Standard
FCD600 (JIS G 5502)
Japanese Industrial Standard JIS G 5502 classifies equivalent material as FCD600. The “FCD” designation abbreviates “Ferrous Casting Ductile” while “600” indicates minimum tensile strength in MPa. Japanese automotive and machinery manufacturers utilize FCD600 for components requiring balanced strength with excellent machinability.
FCD600 specifications:
- Tensile strength minimum: 600 MPa (87,000 psi)
- Elongation minimum: 3%
- Balanced ferritic-pearlitic matrix
International Equivalent Comparison
| Standard | Designation | Tensile Strength (Min) | Yield Strength (Min) | Elongation (Min) | Primary Region |
|---|---|---|---|---|---|
| American (ASTM A536) | 80-55-06 | 552 MPa (80 ksi) | 379 MPa (55 ksi) | 6% | USA, Americas |
| European (EN 1563) | EN-GJS-600-3 | 600 MPa (87 ksi) | 370 MPa (54 ksi) | 3% | Europe |
| Chinese (GB/T 1348) | QT600-3 | 600 MPa (87 ksi) | 370 MPa (54 ksi) | 3% | China, Asia |
| Japanese (JIS G 5502) | FCD600 | 600 MPa (87 ksi) | – | 3% | Japan, Asia |
| International (ISO 1083) | JS/500-7 | 500 MPa (73 ksi) | 320 MPa (46 ksi) | 7% | Global |
When specifying 80-55-06 ductile iron equivalent grades internationally, engineers should verify mechanical property alignment. Most standards specify similar tensile strength levels (550-600 MPa) with varying elongation requirements (3-7%), providing comparable load-bearing characteristics with excellent machinability across all equivalent grades.
Primary Applications of 80-55-06 Material
80-55-06 ductile iron applications include automotive crankshafts, brake components, hydraulic manifolds, industrial gears, pump housings, and structural brackets requiring balanced strength with excellent machinability for cost-effective manufacturing.
The unique combination of reliable strength, superior machinability, and reasonable castability makes 80-55-06 suitable for diverse industrial applications where manufacturing efficiency enhances economic competitiveness.
Automotive Components
Crankshafts and Engine Components
Automotive engine manufacturers utilize 80-55-06 material for crankshafts in passenger vehicles and light commercial applications. The 80,000 psi tensile strength withstands combustion forces and bearing loads while the exceptional machinability enables economical journal finishing and counterweight balancing operations.
The material’s superior damping capacity reduces vibration transmission, contributing to smooth engine operation. Production volumes benefit significantly from the 50-100% faster machining speeds compared to steel alternatives.
Brake System Components
Brake calipers, mounting brackets, and structural supports employ 80-55-06 ductile iron for reliable performance with manufacturing efficiency. The balanced strength provides adequate load capacity while excellent machinability reduces production costs. Superior damping capacity minimizes brake noise and vibration issues.
Hydraulic System Components
Pump and Valve Housings
Hydraulic pump manufacturers specify ASTM A536 80-55-06 for pump housings requiring moderate pressure containment capability. The 80,000 psi tensile strength enables pressure ratings up to 3,000 psi with appropriate safety factors. Industrial hydraulic systems benefit from 80-55-06’s combination of adequate strength and exceptional machinability.
The material machines efficiently for precise internal passages and mounting features. Service life in moderate-duty hydraulic applications commonly exceeds 10-15 years with proper system maintenance.
Manifolds and Control Blocks
Complex hydraulic manifolds utilize 80-55-06 ductile iron for components requiring extensive internal passage machining. The superior machinability enables economical production of complex cross-drilled passages for fluid distribution. The balanced strength withstands moderate pressure cycling throughout extended service intervals.
Industrial Machinery
Gears and Power Transmission
Industrial gearboxes employ 80-55-06 for gear wheels in moderate-duty applications. The adequate hardness (170-270 HB) provides reasonable wear resistance while excellent machinability enables economical gear tooth production. Surface treatments can enhance wear resistance when operating conditions exceed base material capability.
Structural Brackets and Housings
Equipment frames, motor mounts, and structural supports utilize 80-55-06 material for components requiring balanced strength with vibration damping. The superior damping capacity reduces noise transmission in machinery installations. Manufacturing economy from excellent machinability enhances competitiveness for high-volume production.
Selecting a Ductile Iron Casting Foundry
Selecting a ductile iron casting foundry for 80-55-06 production requires evaluating metallurgical expertise in ferritic-pearlitic ductile iron control, comprehensive quality systems, and demonstrated capability manufacturing components meeting ASTM A536 specifications.
Component quality depends critically on foundry expertise and process control capabilities. Engineers should assess technical competence when selecting manufacturing partners for 80-55-06 applications.
Technical Capability Requirements
Ductile Iron Expertise
Foundries specializing in ductile iron production demonstrate deep understanding of 80-55-06 composition control, magnesium treatment optimization, and ferritic-pearlitic microstructure development. They maintain metallurgical laboratories equipped for chemical analysis, metallographic examination, and mechanical testing. Experienced metallurgists oversee production and address quality concerns specific to ductile iron grades.
The foundry should provide detailed certifications including chemical composition, tensile test results, hardness measurements, and metallographic verification of nodule characteristics and matrix structure. Technical support during design optimization helps engineers select appropriate specifications.
Quality System Certification
Professional foundries maintain ISO 9001:2015 quality management certification demonstrating systematic process control. Advanced facilities pursue additional certifications including IATF 16949 for automotive applications. Certification provides independent verification of quality management supporting consistent 80-55-06 material properties.
Production Capability Assessment
Request sample castings demonstrating capability producing components meeting ASTM A536 80-55-06 specification. Examine samples for surface quality, dimensional accuracy, and absence of casting defects. Review material certificates confirming mechanical properties and chemical composition meet requirements.
Metallographic examination verifies nodule quality exceeding 80% spheroidization with 100-300 nodules/mm² and balanced ferritic-pearlitic matrix structure (60-80% ferrite). Hardness testing confirms appropriate values within 170-270 HB range. Dimensional inspection validates manufacturing capability.
For engineers seeking a reliable ductile iron casting foundry with proven expertise in 80-55-06 ductile iron production, SHENRGONG delivers specialized capabilities in balanced ferritic-pearlitic ductile iron manufacturing with comprehensive metallurgical control and quality assurance systems ensuring consistent material properties for diverse industrial applications.
Conclusion
ASTM A536 80-55-06 represents an excellent engineering material choice for applications requiring balanced strength, adequate ductility, and superior manufacturing efficiency. The balanced ferritic-pearlitic microstructure created through precise composition control and magnesium treatment provides reliable 80,000 psi tensile strength with exceptional machinability exceeding comparable steel alternatives. Understanding 80-55-06 material properties, 80-55-06 ductile iron machinability advantages, and 80-55-06 ductile iron equivalent grades enables engineers to optimize component design while controlling manufacturing costs. Success depends on partnering with experienced ductile iron casting foundries maintaining rigorous metallurgical control and comprehensive quality systems for consistent ductile cast iron 80-55-06 quality.
Frequently Asked Questions (FAQ)
What is 80-55-06 ductile iron used for?
80-55-06 is used for automotive crankshafts, brake components, hydraulic pump housings, industrial gears, and structural brackets requiring balanced 80,000 psi tensile strength with excellent machinability for economical manufacturing.
What are 80-55-06 material properties?
80-55-06 properties include minimum 80,000 psi tensile strength, 55,000 psi yield strength, 6% elongation, and 170-270 HB hardness with balanced ferritic-pearlitic matrix providing reliable strength and superior machinability.
What are 80-55-06 ductile iron equivalent grades internationally?
80-55-06 equivalents include EN-GJS-600-3 (Europe), QT600-3 (China), FCD600 (Japan), and ISO 1083 JS/500-7 (International), all providing comparable tensile strength (550-600 MPa) with excellent machinability.
Why is 80-55-06 ductile iron machinability superior?
80-55-06 ductile iron machinability exceeds steel by 50-100% in cutting speed with 2-3 times longer tool life due to spheroidal graphite acting as internal lubricant, enabling faster production and reduced manufacturing costs.
How does 80-55-06 compare to higher-strength ductile iron grades?
80-55-06 offers moderate strength (80,000 psi) with superior machinability and ductility (6% elongation) compared to higher grades like 100-70-03, making it more economical for applications not requiring maximum strength.
