Steel ZG310-570
GB GB/T 11352
ZG310-570 is the higher-strength general engineering cast carbon steel of the GB/T 11352 series, rated 310 MPa minimum yield and 570 MPa minimum tensile at around 0.45 % carbon.
Reference datasheet — ZG310-570 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 N+T condition
ZG310-570 tempers and conditions
ZG310-570 is supplied in 6 conditions, soft to hard. N+T is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Softest condition — chosen to maximise machinability before final hardening, or to relieve hard-to-machine as-cast structure. | 305 | 570 | 20 | 165 HB | 10 % IACS |
Stress relieved | Pick when dimensional stability and low residual stress matter more than peak strength (large weldments and machined frames). | 315 | 575 | 18 | 175 HB | 10 % IACS |
As fabricated | Cheapest condition for lightly stressed or thin-section castings where GB minimums are met as-cast. | 320 | 585 | 15 | 185 HB | 10 % IACS |
N+TDefault Normalized and tempered | Default supply condition: refined grain plus tempering gives the best balance of GB minimums, toughness and machinability. | 340 | 600 | 19 | 185 HB | — |
Normalized | Refines the coarse as-cast grain for uniform strength; standard treatment for general structural castings. | 350 | 620 | 18 | 195 HB | — |
Quenched and tempered | Choose for heavily loaded gears, sprockets and links needing higher yield and wear resistance in moderate section sizes. | 550 | 760 | 14 | 22 HRC | — |
What is ZG310-570?
ZG310-570 is the higher-strength general engineering cast carbon steel of the GB/T 11352 series, rated 310 MPa minimum yield and 570 MPa minimum tensile at around 0.45 % carbon. Default values are 340 MPa yield, 600 MPa tensile, 19 % elongation, 185 HB (91 HRB), service to 400 °C, machinability 50 and weldability 45, in as-cast, stress-relieved, annealed, normalized, normalized and tempered or quenched and tempered condition. It is used for heavily loaded machine and structural castings and takes local surface hardening. The higher carbon reduces ductility and weldability — choose ZG270-500 where weld repair is routine. ZG310-570 has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,420°C (2,588 °F). ZG310-570 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 76% of steel grades. Elongation at break is 19% and the elastic modulus is 205 GPa (29.7 Msi).
What is ZG310-570 used for?
- heavy machine frames
- large gears
- crusher parts
- railway castings
Advantages
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
Limitations
- Limited formability — 15/100, worse than 87% of steel grades
- Low fracture toughness — 60 MPa·√m (54.6 ksi·√in), worse than 78% of steel grades
- Low strength — 340 MPa (49.3 ksi), worse than 76% of steel grades
ZG310-570 properties
Typical room-temperature values for ZG310-570-N+T; bars are the position among steel grades.
Physical3
ZG310-570 has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical16
ZG310-570 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 76% of steel grades. Elongation at break is 19% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ZG310-570 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 11.9 µm/m·K (6.61 µin/in·°F).
Electrical3
ZG310-570 conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of ZG310-570 takes about 27 MJ of energy and emits 2 kg of CO₂ — less than 59% of steel grades. Typical recycled content is 85%.
Manufacturability8
ZG310-570's machinability is fair (50/100, worse than 53% of steel grades); weldability fair (45/100); formability poor (15/100).
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. ZG310-570 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ZG310-570
Is ZG310-570 easy to machine?
Machines like 1045 at ~55 % of AISI 1212; anneal or temper first, remove hard cast skin with carbide tooling and expect scattered sand/oxide inclusions.
Can ZG310-570 be welded?
Weldable with low-hydrogen E7018/ER70S-6 but the 0.45 % C requires 150–250 °C preheat, controlled interpass and 600–650 °C post-weld stress relief to avoid HAZ cracking.
Can ZG310-570 be formed, bent or molded?
Green-sand, resin-sand or shell casting with generous risering and 1560–1600 °C pour; high solidification shrinkage (~2 %) demands directional feeding and generous fillets.
ZG310-570 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 |
|---|---|---|
| CGB/T 11352 upper limit; ≈0.45 % typical (hence old name ZG45) | ≤ 0.5 | 0.45 |
| Si | ≤ 0.6 | 0.4 |
| Mn | ≤ 0.9 | 0.7 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.04 | 0.02 |
| Crresidual element | ≤ 0.35 | |
| Niresidual element | ≤ 0.3 | |
| Curesidual element | ≤ 0.3 | |
| Moresidual element | ≤ 0.2 | |
| Vresidual element; total residuals ≤1.00 % | ≤ 0.05 | |
| Fe | balance |
What surface finishes work on ZG310-570?
Shot-blast then paint, phosphate + oil, zinc or hard-chrome plate; bare surfaces rust quickly and anodizing does not apply.
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 ZG310-570 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- GB/T 11352
- Also called
- ZG45
How much does ZG310-570 cost?
ZG310-570 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.
ZG310-570 — frequently asked
What is ZG310-570 used for?
ZG310-570 is typically used for heavy machine frames, large gears, crusher parts and railway castings. In short: strongest grade in family; surface-hardenable cast steel; preheat required for welding.
What is the yield strength of ZG310-570?
ZG310-570 has a typical yield strength of 340 MPa (49.3 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 76% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is ZG310-570 easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% of steel grades). Machines like 1045 at ~55 % of AISI 1212; anneal or temper first, remove hard cast skin with carbide tooling and expect scattered sand/oxide inclusions.
Can ZG310-570 be welded?
With care — weldability is rated fair (45/100). Weldable with low-hydrogen E7018/ER70S-6 but the 0.45 % C requires 150–250 °C preheat, controlled interpass and 600–650 °C post-weld stress relief to avoid HAZ cracking.
What surface finishes work on ZG310-570?
Shot-blast then paint, phosphate + oil, zinc or hard-chrome plate; bare surfaces rust quickly and anodizing does not apply.
Can ZG310-570 be formed, bent or molded?
Green-sand, resin-sand or shell casting with generous risering and 1560–1600 °C pour; high solidification shrinkage (~2 %) demands directional feeding and generous fillets.
What is the maximum service temperature of ZG310-570?
ZG310-570 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 ZG310-570 N+T and ZG310-570-A?
N+T is the default condition — default supply condition: refined grain plus tempering gives the best balance of GB minimums, toughness and machinability. A: softest condition — chosen to maximise machinability before final hardening, or to relieve hard-to-machine as-cast structure. Yield strength is 340 MPa in N+T versus 305 MPa in A.
How much does ZG310-570 cost?
ZG310-570 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
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (cast carbon steels) — ASM International (1990)
- ASM Handbook Vol.15 — Casting — ASM International (2008)
- Steel Castings Handbook (SFSA) mechanical & machinability data — Steel Founders' Society of America (1995)
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.