Steel A220 M5003
ASTM A220 M5003 · JIS FCMP · GB KTZ700-02
ASTM A220 M5003 is a pearlitic malleable iron, also listed as KTZ700-02 and FCMP, in which the graphitizing anneal is followed by quench and temper to give a pearlitic to tempered-martensitic matrix.
Reference datasheet — A220 M5003 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AQT condition
A220 M5003 tempers and conditions
A220 M5003 is supplied in 3 conditions, soft to hard. AQT is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AQTDefault Malleableized, air-quenched and tempered | Standard commercial route for M5003 castings: air quench from the austenitizing hold, then temper to the 179–229 HB band. | 380 | 550 | 4 | 197 HB | — |
Induction hardened | Use when the M5003 core toughness is kept but a hard wear surface (cams, sprocket teeth, journals) is needed. | 380 | 550 | 3 | 52 HRC | 5.5 % IACS |
Oil-quenched and tempered | Pick when a uniform tempered-martensite matrix and tighter hardness control through the section are wanted for wear parts. | 400 | 570 | 3.5 | 15 HRC | 5.4 % IACS |
What is A220 M5003?
ASTM A220 M5003 is a pearlitic malleable iron, also listed as KTZ700-02 and FCMP, in which the graphitizing anneal is followed by quench and temper to give a pearlitic to tempered-martensitic matrix. It is specified for cast drivetrain and linkage parts needing more strength and wear resistance than ferritic malleable iron: 380 MPa yield, 550 MPa tensile, 4 % elongation, 197 HB (92 HRB) and service to 400 °C. Ductility and fusion weldability are limited, sections should stay below roughly 25 mm, and machinability falls to a score of 65. Quenched-and-tempered ductile iron is the common alternative. A220 M5003 has a density of 7.3 g/cm³ (0.264 lb/in³), lighter than 98% of steel grades. It melts at 1,120°C (2,048 °F). A220 M5003 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 68% of steel grades. Elongation at break is 4% and the elastic modulus is 172 GPa (24.9 Msi).
What is A220 M5003 used for?
- gears
- connecting rods
- camshafts
- universal joint yokes
Advantages
- Low embodied carbon — 1.7 kg CO₂/kg, better than 99% of steel grades
- Easy to machine — 65/100, better than 93% of steel grades
Limitations
- Limited ductility — 4%, worse than 98% of steel grades
- Low stiffness — 172 GPa (24.9 Msi), worse than 96% of steel grades
- Low electrical conductivity — 5.7 % IACS, worse than 80% of steel grades
- Limited formability — 20/100, worse than 80% of steel grades
- Difficult to weld — 25/100, worse than 77% of steel grades
A220 M5003 properties
Typical room-temperature values for A220 M5003-AQT; bars are the position among steel grades.
Physical3
A220 M5003 has a density of 7.3 g/cm³ (0.264 lb/in³), lighter than 98% of steel grades. It melts at 1,120°C (2,048 °F).
Mechanical13
A220 M5003 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 68% of steel grades. Elongation at break is 4% and the elastic modulus is 172 GPa (24.9 Msi).
Thermal6
A220 M5003 is rated for continuous service to 400°C (752 °F). It conducts heat at 47 W/m·K (27.2 BTU/hr·ft·°F), better than 75% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
A220 M5003 conducts electricity at 5.7 % IACS, worse than 80% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (16/100), better than 79% of steel grades.
Sustainability4
Producing a kilogram of A220 M5003 takes about 20 MJ of energy and emits 1.7 kg of CO₂ — less than 99% of steel grades. Typical recycled content is 90%.
Manufacturability7
A220 M5003's machinability is good (65/100, better than 93% of steel grades); weldability poor (25/100); formability poor (20/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. A220 M5003 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A220 M5003
Is A220 M5003 easy to machine?
Machines well with carbide or coated carbide at moderate speeds; temper-carbon nodules break chips, but the pearlitic matrix is harder and more abrasive than ferritic malleable — expect ~80 % of AISI 1212 and check for any residual white-iron corners.
Can A220 M5003 be welded?
Poor fusion weldability: preheat 300–400 °C, Ni or NiFe filler, slow cool and re-temper; braze welding or mechanical joining is preferred for production parts.
Can A220 M5003 be formed, bent or molded?
Cast to shape as white iron in green sand/shell moulds with section thickness kept below roughly 25 mm, then malleableized (graphitizing anneal) and quench-tempered; only minor cold straightening/bending of thin lugs is possible.
A220 M5003 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Ctotal carbon; ASTM A220 controls properties, not chemistry — values are foundry-typical | 2 – 2.9 | 2.45 |
| Si | 0.9 – 1.9 | 1.4 |
| Mnraised in pearlitic grades to stabilize combined carbon | 0.25 – 1.25 | 0.6 |
| S | 0.03 – 0.18 | 0.1 |
| P | ≤ 0.15 | 0.05 |
| Crkept low to avoid stable carbides | ≤ 0.1 | 0.04 |
| Cuoptional pearlite/strength enhancer | ≤ 1 | — |
| Mooptional in heavier sections | ≤ 0.5 | — |
| Fe | balance | — |
What surface finishes work on A220 M5003?
Not anodizable; shot blast then paint, phosphate + oil, zinc plate or hot-dip galvanize for corrosion protection; surfaces can be induction hardened for wear.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel A220 M5003 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- KTZ700-02
- JIS
- FCMP
How much does A220 M5003 cost?
A220 M5003 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
A220 M5003 — frequently asked
What is A220 M5003 used for?
A220 M5003 is typically used for gears, connecting rods, camshafts and universal joint yokes. In short: strongest malleable iron grade; wear-resistant pearlitic matrix; induction-hardenable surfaces.
What is the yield strength of A220 M5003?
A220 M5003 has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 68% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is A220 M5003 easy to machine?
Reasonably — machinability is rated good (65/100, better than 93% of steel grades). Machines well with carbide or coated carbide at moderate speeds; temper-carbon nodules break chips, but the pearlitic matrix is harder and more abrasive than ferritic malleable — expect ~80 % of AISI 1212 and check for any residual white-iron corners.
Can A220 M5003 be welded?
Not readily — weldability is rated poor (25/100). Poor fusion weldability: preheat 300–400 °C, Ni or NiFe filler, slow cool and re-temper; braze welding or mechanical joining is preferred for production parts.
What surface finishes work on A220 M5003?
Not anodizable; shot blast then paint, phosphate + oil, zinc plate or hot-dip galvanize for corrosion protection; surfaces can be induction hardened for wear.
Can A220 M5003 be formed, bent or molded?
Cast to shape as white iron in green sand/shell moulds with section thickness kept below roughly 25 mm, then malleableized (graphitizing anneal) and quench-tempered; only minor cold straightening/bending of thin lugs is possible.
What is the maximum service temperature of A220 M5003?
A220 M5003 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between A220 M5003-AQT and A220 M5003-OQT?
AQT is the default condition — standard commercial route for M5003 castings: air quench from the austenitizing hold, then temper to the 179–229 HB band. OQT: pick when a uniform tempered-martensite matrix and tighter hardness control through the section are wanted for wear parts. Yield strength is 380 MPa in AQT versus 400 MPa in OQT.
How much does A220 M5003 cost?
A220 M5003 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM A220/A220M — Standard Specification for Pearlitic Malleable Iron — ASTM International (2018)
- GB/T 9440 (KTZ pearlitic malleable iron) (2010)
- JIS G 5705 Malleable iron castings (FCMP) — JSA (2000)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys (Malleable Iron) — ASM International (1990)
- ASM Handbook Vol.15 — Casting — ASM International (2008)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.