Steel A47 32510
ASTM A47 32510 · EN EN-GJMB-350-10 · JIS FCMB35 · GB KTH350-10
ASTM A47 32510 is a ferritic (blackheart) malleable cast iron produced by graphitizing-annealing white iron castings so temper-carbon nodules replace the brittle carbide network; equivalents are EN-GJMB-350-10, FCMB35 and KTH350-10.
Reference datasheet — A47 32510 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 32510 condition
A47 32510 tempers and conditions
A47 32510 is supplied in 8 conditions, soft to hard. 32510 is the default FabDigit quotes; the values on this page are for it.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
annealed ferritic malleable iron, 32 ksi yield (ASTM A602) | Automotive-specification equivalent of A47 32510: annealed ferritic, specified by hardness for low-stress machined parts. | 230 | 360 | 12 | 130 HB | 51 W/m·K |
32510Default Annealed ferritic (blackheart) malleable iron, 32.5 ksi yield / 10 %… | Standard stocked condition: two-stage graphitizing anneal for maximum machinability and 10 % ductility in pipe fittings, brackets and hardware. | 240 | 360 | 12 | 130 HB | 51 W/m·K |
Annealed ferritic malleable iron, 35 ksi yield / 18 % elong | Pick when higher ductility/toughness is needed for cold-formed or bent-in-service parts (clips, chain links, ties). | 250 | 380 | 20 | 130 HB | 51 W/m·K |
air-quenched and tempered pearlitic malleable iron, 45 ksi yield / 4 % elong. | Lowest-strength pearlitic grade: pick when moderate strength plus easy machining and some ductility are needed (levers, brackets). | 320 | 460 | 5 | 190 HB | 46 W/m·K |
air-quenched and tempered pearlitic malleable iron, 50 ksi yield / 3 % elong. | Use for higher static strength and better wear resistance than ferritic grades while keeping good machinability. | 355 | 530 | 4 | 210 HB | 46 W/m·K |
liquid-quenched and tempered malleable iron, 55 ksi yield / 3 % elong. | Oil-quenched tempered-martensite grade for higher yield strength at the same hardness band as M5003. | 390 | 530 | 4 | 210 HB | 46 W/m·K |
liquid-quenched and tempered malleable iron, 70 ksi yield / 2 % elong. | High-strength quenched-and-tempered grade for loaded automotive parts (steering arms, connecting links) where 2 % ductility suffices. | 495 | 630 | 3 | 24 HRC | 46 W/m·K |
liquid-quenched and tempered malleable iron, 85 ksi yield / 1 % elong. | Highest-strength, hardest malleable grade for wear-loaded gears/cams; essentially no ductility reserve, machine before or with carbide tooling. | 600 | 730 | 2 | 29 HRC | 45 W/m·K |
What is A47 32510?
ASTM A47 32510 is a ferritic (blackheart) malleable cast iron produced by graphitizing-annealing white iron castings so temper-carbon nodules replace the brittle carbide network; equivalents are EN-GJMB-350-10, FCMB35 and KTH350-10. It offers 240 MPa yield, 360 MPa tensile, 12 % elongation and 130 HB (72 HRB) with a machinability score of 85, which suits high-volume small castings such as brackets and threaded pipe fittings. Weldability is poor (score 25) and service is limited to about 425 °C; ductile iron 65-45-12 covers the same duty in heavier sections. A47 32510 has a density of 7.3 g/cm³ (0.264 lb/in³), lighter than 98% of steel grades. It melts at 1,130°C (2,066 °F). A47 32510 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 360 MPa (52.2 ksi) — weaker than 96% of steel grades. Elongation at break is 12% and the elastic modulus is 170 GPa (24.7 Msi).
What is A47 32510 used for?
- automotive suspension brackets
- steering components
- pipe fittings
- hand tools
Advantages
- Low embodied carbon — 1.6 kg CO₂/kg, better than 100% of steel grades
- Easy to machine — 85/100, better than 98% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
Limitations
- Low stiffness — 170 GPa (24.7 Msi), worse than 97% of steel grades
- Low strength — 240 MPa (34.8 ksi), worse than 96% of steel grades
- Limited formability — 10/100, worse than 95% of steel grades
- Low fracture toughness — 45 MPa·√m (41 ksi·√in), worse than 90% of steel grades
- Limited ductility — 12%, worse than 84% of steel grades
A47 32510 properties
Typical room-temperature values for A47 32510-32510; bars are the position among steel grades.
Physical3
A47 32510 has a density of 7.3 g/cm³ (0.264 lb/in³), lighter than 98% of steel grades. It melts at 1,130°C (2,066 °F).
Mechanical15
A47 32510 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 360 MPa (52.2 ksi) — weaker than 96% of steel grades. Elongation at break is 12% and the elastic modulus is 170 GPa (24.7 Msi).
Thermal6
A47 32510 is rated for continuous service to 425°C (797 °F). It conducts heat at 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
A47 32510 conducts electricity at 5.5 % IACS, worse than 81% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (18/100), better than 83% of steel grades.
Sustainability4
Producing a kilogram of A47 32510 takes about 19 MJ of energy and emits 1.6 kg of CO₂ — less than 100% of steel grades. Typical recycled content is 85%.
Manufacturability8
A47 32510's machinability is excellent (85/100, better than 98% of steel grades); weldability poor (25/100); formability not recommended (10/100).
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. A47 32510 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A47 32510
Is A47 32510 easy to machine?
One of the best-machining ferrous materials in the annealed state — temper carbon breaks chips; HSS works, use carbide and lower speeds above 200 HB (M7002/M8501).
Can A47 32510 be welded?
Not recommended for structural joints: HAZ forms carbide/martensite and cracks; if unavoidable, preheat 300–400 °C, use Ni-based electrodes and re-anneal/stress relieve.
Can A47 32510 be formed, bent or molded?
Green-sand or shell-mold cast as white iron with chilled thin sections (typically <25 mm), then two-stage graphitizing anneal (~900 °C hold + slow cool through eutectoid); pearlitic grades are air- or oil-quenched and tempered afterwards.
A47 32510 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; present as temper carbon after anneal | 2.2 – 2.9 | 2.5 |
| Sigraphitizer, controls anneal time | 0.9 – 1.9 | 1.4 |
| Mn | 0.15 – 1.25 | 0.4 |
| S | ≤ 0.2 | 0.09 |
| P | ≤ 0.18 | 0.06 |
| Crkept low to avoid stable carbide | ≤ 0.06 | 0.03 |
| FeASTM A47 sets properties, not chemistry; values are typical foundry practice | balance | — |
What surface finishes work on A47 32510?
Shot-blast the anneal scale, then hot-dip galvanize (standard for pipe fittings), zinc/phosphate, e-coat or paint; anodizing not applicable and high-polish finishes are limited by temper-carbon pull-out.
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 A47 32510 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- EN-GJMB-350-10
- GB (China)
- KTH350-10
- JIS
- FCMB35
How much does A47 32510 cost?
A47 32510 is a budget-cost steel ($), cheaper than about 90% 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.
A47 32510 — frequently asked
What is A47 32510 used for?
A47 32510 is typically used for automotive suspension brackets, steering components, pipe fittings and hand tools. In short: best-machining cast iron; ductile at low cost; galvanizes readily.
What is the yield strength of A47 32510?
A47 32510 has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 360 MPa (52.2 ksi) — weaker than 96% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is A47 32510 easy to machine?
Yes — machinability is rated excellent (85/100, better than 98% of steel grades). One of the best-machining ferrous materials in the annealed state — temper carbon breaks chips; HSS works, use carbide and lower speeds above 200 HB (M7002/M8501).
Can A47 32510 be welded?
Not readily — weldability is rated poor (25/100). Not recommended for structural joints: HAZ forms carbide/martensite and cracks; if unavoidable, preheat 300–400 °C, use Ni-based electrodes and re-anneal/stress relieve.
What surface finishes work on A47 32510?
Shot-blast the anneal scale, then hot-dip galvanize (standard for pipe fittings), zinc/phosphate, e-coat or paint; anodizing not applicable and high-polish finishes are limited by temper-carbon pull-out.
Can A47 32510 be formed, bent or molded?
Green-sand or shell-mold cast as white iron with chilled thin sections (typically <25 mm), then two-stage graphitizing anneal (~900 °C hold + slow cool through eutectoid); pearlitic grades are air- or oil-quenched and tempered afterwards.
What is the maximum service temperature of A47 32510?
A47 32510 is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between A47 32510 32510 and A47 32510-M8501?
32510 is the default condition — standard stocked condition: two-stage graphitizing anneal for maximum machinability and 10 % ductility in pipe fittings, brackets and hardware. M8501: highest-strength, hardest malleable grade for wear-loaded gears/cams; essentially no ductility reserve, machine before or with carbide tooling. Yield strength is 240 MPa in 32510 versus 600 MPa in M8501.
How much does A47 32510 cost?
A47 32510 is a budget-cost steel ($), cheaper than about 90% 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 A47/A47M — Ferritic Malleable Iron Castings — ASTM International (2018)
- ASTM A602 — Automotive Malleable Iron Castings — ASTM International (2019)
- GB/T 9440 — (KTH350-10) — SAC (2010)
- EN 1562 — Founding: Malleable cast irons (EN-GJMB-350-10) — CEN (2019)
- ASM Handbook Vol.1: Properties and Selection — Malleable Iron — ASM International (1990)
- Machinery's Handbook — machinability ratings of cast irons — Industrial Press (2020)
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.