Steel A536 100-70-03
ASTM A536 100-70-03 · EN EN-GJS-700-2, GGG70 · JIS FCD700 · GB QT700-2
ASTM A536 100-70-03 is a pearlitic ductile (nodular) iron (EN-GJS-700-2, QT700-2, FCD700, GGG70, 0.7070) supplied as-cast, normalized and tempered, or quenched and tempered.
Reference datasheet — A536 100-70-03 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 AS-CAST condition
A536 100-70-03 tempers and conditions
A536 100-70-03 is supplied in 5 conditions, soft to hard. AS-CAST is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Use for dimensionally critical machined castings (housings, machine bases) to remove casting/welding residual stress with minimal loss of strength. | 505 | 730 | 5 | 21 HRC | 2.9 % IACS |
AS-CASTDefault no post-cast heat treatment | Standard commercial condition: pearlite promoted by Cu/Mn alloying and controlled cooling; cheapest way to meet 100-70-03. | 520 | 760 | 4 | 23 HRC | — |
Flame or Induction Surface Hardened | Select for gear teeth, journals and slideways needing a hard wear surface and compressive residual stress while keeping a tough pearlitic core. | 520 | 760 | 3 | 52 HRC | 2.9 % IACS |
Normalized and tempered | Choose when section thickness or chemistry cannot give uniform as-cast pearlite; gives more consistent strength and hardness through the section. | 550 | 800 | 4 | 26 HRC | — |
Quenched and tempered | Pick for the highest through-strength and wear resistance in the 100-70-03 family (tempered martensite matrix), at the cost of machinability and distortion risk. | 620 | 860 | 3 | 30 HRC | — |
What is A536 100-70-03?
ASTM A536 100-70-03 is a pearlitic ductile (nodular) iron (EN-GJS-700-2, QT700-2, FCD700, GGG70, 0.7070) supplied as-cast, normalized and tempered, or quenched and tempered. It provides 760 MPa tensile, 520 MPa yield, 4 % elongation and 241 HB (23 HRC) with service to 400 °C, so it suits highly loaded shafts and wear surfaces that ferritic grades cannot carry. Ductility and machinability (score 55) are lower than 65-45-12, and welding is repair-only. Use 80-55-06 when more elongation is needed, or austempered ductile iron for higher strength with better toughness. A536 100-70-03 has a density of 7.1 g/cm³ (0.257 lb/in³), lighter than 99% of steel grades. It melts at 1,150°C (2,102 °F). A536 100-70-03 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 67% of steel grades. Elongation at break is 4% and the elastic modulus is 169 GPa (24.5 Msi).
What is A536 100-70-03 used for?
- crankshafts
- gears
- heavy machinery parts
- hydraulic components
Advantages
- Low embodied carbon — 1.7 kg CO₂/kg, better than 99% of steel grades
Limitations
- Limited formability — 3/100, worse than 99% of steel grades
- Limited ductility — 4%, worse than 98% of steel grades
- Low stiffness — 169 GPa (24.5 Msi), worse than 97% of steel grades
- Low fracture toughness — 30 MPa·√m (27.3 ksi·√in), worse than 96% of steel grades
- Low electrical conductivity — 2.9 % IACS, worse than 93% of steel grades
A536 100-70-03 properties
Typical room-temperature values for A536 100-70-03-AS-CAST; bars are the position among steel grades.
Physical3
A536 100-70-03 has a density of 7.1 g/cm³ (0.257 lb/in³), lighter than 99% of steel grades. It melts at 1,150°C (2,102 °F).
Mechanical17
A536 100-70-03 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 67% of steel grades. Elongation at break is 4% and the elastic modulus is 169 GPa (24.5 Msi).
Thermal6
A536 100-70-03 is rated for continuous service to 400°C (752 °F). It conducts heat at 32 W/m·K (18.5 BTU/hr·ft·°F), worse than 82% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
A536 100-70-03 conducts electricity at 2.9 % IACS, worse than 93% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (15/100), better than 75% of steel grades.
Sustainability4
Producing a kilogram of A536 100-70-03 takes about 20 MJ of energy and emits 1.7 kg of CO₂ — less than 99% of steel grades. Typical recycled content is 85%.
Manufacturability7
A536 100-70-03's machinability is good (55/100, better than 62% of steel grades); weldability poor (25/100); formability not recommended (3/100).
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. A536 100-70-03 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A536 100-70-03
Is A536 100-70-03 easy to machine?
Machines well with carbide or ceramic at 120–250 m/min dry; graphite nodules break chips, but carbide edges wear faster than on ferritic grades and hard casting skin/carbides should be taken in one deep first cut.
Can A536 100-70-03 be welded?
Poor weldability — use NiFe (ENiFe-CI) electrodes, 300–400 °C preheat, short low-heat stringer beads with peening, then stress relieve; structural welding is generally avoided in favour of repair welding only.
Can A536 100-70-03 be formed, bent or molded?
Green-sand or shell mould casting with Mg treatment and late inoculation; keep section modulus adequate for nodularity and use risers/chills to avoid shrinkage and carbide in thin sections.
A536 100-70-03 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 |
|---|---|---|
| CASTM A536 does not specify chemistry; typical foundry range | 3.3 – 3.9 | 3.6 |
| Si | 2 – 2.8 | 2.4 |
| Mnpearlite stabilizer | 0.2 – 0.6 | 0.4 |
| Cuadded to promote as-cast pearlite | 0.3 – 0.9 | 0.6 |
| Nioptional, heavy sections | 0 – 1 | 0.2 |
| Mgresidual, nodulizing | 0.03 – 0.06 | 0.04 |
| P | ≤ 0.05 | 0.03 |
| S | ≤ 0.02 | 0.01 |
| Fe | balance | — |
What surface finishes work on A536 100-70-03?
Shot blast then prime/paint or apply zinc-rich or epoxy coating for corrosion protection; hard chrome, nitriding and phosphating all work, but polishing is limited by exposed graphite nodules.
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 A536 100-70-03 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- EN-GJS-700-2GGG700.7070
- GB (China)
- QT700-2
- JIS
- FCD700
How much does A536 100-70-03 cost?
A536 100-70-03 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.
A536 100-70-03 — frequently asked
What is A536 100-70-03 used for?
A536 100-70-03 is typically used for crankshafts, gears, heavy machinery parts and hydraulic components. In short: high-strength pearlitic ductile iron; wear resistance without alloy steel; flame/induction hardenable.
What is the yield strength of A536 100-70-03?
A536 100-70-03 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 67% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is A536 100-70-03 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machines well with carbide or ceramic at 120–250 m/min dry; graphite nodules break chips, but carbide edges wear faster than on ferritic grades and hard casting skin/carbides should be taken in one deep first cut.
Can A536 100-70-03 be welded?
Not readily — weldability is rated poor (25/100). Poor weldability — use NiFe (ENiFe-CI) electrodes, 300–400 °C preheat, short low-heat stringer beads with peening, then stress relieve; structural welding is generally avoided in favour of repair welding only.
What surface finishes work on A536 100-70-03?
Shot blast then prime/paint or apply zinc-rich or epoxy coating for corrosion protection; hard chrome, nitriding and phosphating all work, but polishing is limited by exposed graphite nodules.
Can A536 100-70-03 be formed, bent or molded?
Green-sand or shell mould casting with Mg treatment and late inoculation; keep section modulus adequate for nodularity and use risers/chills to avoid shrinkage and carbide in thin sections.
What is the maximum service temperature of A536 100-70-03?
A536 100-70-03 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 A536 100-70-03 AS-CAST and A536 100-70-03-SR?
AS-CAST is the default condition — standard commercial condition: pearlite promoted by Cu/Mn alloying and controlled cooling; cheapest way to meet 100-70-03. SR: use for dimensionally critical machined castings (housings, machine bases) to remove casting/welding residual stress with minimal loss of strength. Yield strength is 520 MPa in AS-CAST versus 505 MPa in SR.
How much does A536 100-70-03 cost?
A536 100-70-03 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 A536 — Standard Specification for Ductile Iron Castings — ASTM International (2019)
- EN 1563 — Founding: Spheroidal graphite cast irons (EN-GJS-700-2) — CEN (2018)
- GB/T 1348 (QT700-2) — SAC (2019)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Ductile Iron Data for Design Engineers — Ductile Iron Society / Rio Tinto Iron & Titanium (2013)
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.