Steel A47 M3210
ASTM A47 M3210 · EN EN-GJMB-350-10, 0.8135 · JIS FCMB · GB KTH330-08
ASTM A47 M3210 is a ferritic (blackheart) malleable iron produced by a long graphitizing anneal of white iron castings, cross-referenced to KTH330-08, EN-GJMB-350-10 (0.8135) and FCMB.
Reference datasheet — A47 M3210 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 ANN condition
A47 M3210 tempers and conditions
A47 M3210 is supplied in 3 conditions, soft to hard. ANN 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 |
|---|---|---|---|---|---|---|
Annealed + stress relieved | Low-temperature (about 500–600 °C) stress relief used when tight dimensional stability is needed after straightening or heavy metal removal. | 235 | 355 | 15 | 125 HB | 5 % IACS |
ANNDefault Annealed | Standard supply condition: white-iron casting fully graphitize-annealed to a ferritic matrix with temper carbon — pick it for ductile, easily machined small fittings and brackets. | 240 | 360 | 14 | 130 HB | — |
Annealed + hot-dip galvanized | Same annealed casting with a hot-dip zinc coating — the normal condition for plumbing/pipe fittings and outdoor line hardware. | 240 | 360 | 13 | 130 HB | 5 % IACS |
What is A47 M3210?
ASTM A47 M3210 is a ferritic (blackheart) malleable iron produced by a long graphitizing anneal of white iron castings, cross-referenced to KTH330-08, EN-GJMB-350-10 (0.8135) and FCMB. It is chosen for small sand- and shell-cast fittings and hardware that must be threaded, staked or lightly bent, offering 240 MPa yield, 360 MPa tensile and 14 % elongation at 130 HB (74 HRB) with a machinability score of 80 and service to 425 °C. Limits are poor fusion weldability, section thickness below about 40 mm for full graphitization, and low corrosion resistance (score 16), so parts are galvanized or painted. Ductile iron is the usual alternative in heavier sections. A47 M3210 has a density of 7.3 g/cm³ (0.264 lb/in³), lighter than 98% of steel grades. It melts at 1,135°C (2,075 °F). A47 M3210 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 14% and the elastic modulus is 170 GPa (24.7 Msi).
What is A47 M3210 used for?
- pipe fittings
- hand tools
- hardware
- small brackets
Advantages
- Easy to machine — 80/100, 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
- Low embodied carbon — 1.9 kg CO₂/kg, 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
- Low fracture toughness — 45 MPa·√m (41 ksi·√in), worse than 90% of steel grades
- Low electrical conductivity — 5 % IACS, worse than 82% of steel grades
- Limited ductility — 14%, worse than 75% of steel grades
A47 M3210 properties
Typical room-temperature values for A47 M3210-ANN; bars are the position among steel grades.
Physical3
A47 M3210 has a density of 7.3 g/cm³ (0.264 lb/in³), lighter than 98% of steel grades. It melts at 1,135°C (2,075 °F).
Mechanical14
A47 M3210 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 14% and the elastic modulus is 170 GPa (24.7 Msi).
Thermal6
A47 M3210 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 M3210 conducts electricity at 5 % IACS, worse than 82% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (16/100), better than 79% of steel grades.
Sustainability4
Producing a kilogram of A47 M3210 takes about 25 MJ of energy and emits 1.9 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 85%.
Manufacturability8
A47 M3210's machinability is very good (80/100, better than 98% of steel grades); weldability poor (28/100); formability poor (30/100).
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 M3210 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A47 M3210
Is A47 M3210 easy to machine?
One of the easiest ferrous castings to cut — free-machining at 120 % of B1112; use carbide or HSS, dry or with light coolant, and expect short chips from the temper-carbon nodules.
Can A47 M3210 be welded?
Poor: fusion welding re-forms brittle white iron in the HAZ; if unavoidable use Ni or NiFe electrodes, low heat input, preheat 200–300 °C and post-weld anneal, or braze instead.
Can A47 M3210 be formed, bent or molded?
Cast as white iron in green sand/shell moulds with adequate chills, then malleablized 30–60 h; section thickness must stay under about 40 mm for full graphitization, and thin sections can be cold-bent or staked.
A47 M3210 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 in white-iron base; converted to temper-carbon nodules on annealing | 2.16 – 2.9 | 2.45 |
| Sigraphitizer; controls annealing time | 0.9 – 1.9 | 1.4 |
| Mn | 0.25 – 0.6 | 0.4 |
| S | 0.05 – 0.18 | 0.1 |
| P | ≤ 0.18 | 0.05 |
| Crkept low — retards graphitization | ≤ 0.06 | 0.03 |
| Fe | balance | — |
What surface finishes work on A47 M3210?
Shot-blast then hot-dip galvanize, zinc/nickel plate, phosphate-and-oil or paint; no anodizing (ferrous). Surfaces take paint well after blasting.
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 M3210 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- EN-GJMB-350-100.8135
- GB (China)
- KTH330-08
- JIS
- FCMB
How much does A47 M3210 cost?
A47 M3210 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.
A47 M3210 — frequently asked
What is A47 M3210 used for?
A47 M3210 is typically used for pipe fittings, hand tools, hardware and small brackets. In short: best-machining malleable iron; ductile alternative to grey iron; galvanizes readily.
What is the yield strength of A47 M3210?
A47 M3210 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 3 listed tempers.
Is A47 M3210 easy to machine?
Yes — machinability is rated very good (80/100, better than 98% of steel grades). One of the easiest ferrous castings to cut — free-machining at 120 % of B1112; use carbide or HSS, dry or with light coolant, and expect short chips from the temper-carbon nodules.
Can A47 M3210 be welded?
Not readily — weldability is rated poor (28/100). Poor: fusion welding re-forms brittle white iron in the HAZ; if unavoidable use Ni or NiFe electrodes, low heat input, preheat 200–300 °C and post-weld anneal, or braze instead.
What surface finishes work on A47 M3210?
Shot-blast then hot-dip galvanize, zinc/nickel plate, phosphate-and-oil or paint; no anodizing (ferrous). Surfaces take paint well after blasting.
Can A47 M3210 be formed, bent or molded?
Cast as white iron in green sand/shell moulds with adequate chills, then malleablized 30–60 h; section thickness must stay under about 40 mm for full graphitization, and thin sections can be cold-bent or staked.
What is the maximum service temperature of A47 M3210?
A47 M3210 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 M3210-ANN and A47 M3210 ANN-SR?
ANN is the default condition — standard supply condition: white-iron casting fully graphitize-annealed to a ferritic matrix with temper carbon — pick it for ductile, easily machined small fittings and brackets. ANN-SR: low-temperature (about 500–600 °C) stress relief used when tight dimensional stability is needed after straightening or heavy metal removal. Yield strength is 240 MPa in ANN versus 235 MPa in ANN-SR.
How much does A47 M3210 cost?
A47 M3210 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 A602 — Automotive Malleable Iron Castings (grades M3210…M8501) — ASTM International (2018)
- ASTM A47/A47M — Ferritic Malleable Iron Castings (32510, 35018) — ASTM International (2018)
- GB/T 9440 (KTH330-08 ) (2010)
- EN 1562 — Founding: Malleable cast irons (EN-GJMB-350-10, 0.8135) — CEN (2019)
- 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.