Steel ZG270-500
GB GB/T 11352
ZG270-500 is a medium-strength cast carbon steel to GB/T 11352, rated 270 MPa minimum yield and 500 MPa minimum tensile and comparable to ASTM WCB.
Reference datasheet — ZG270-500 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 condition
ZG270-500 tempers and conditions
ZG270-500 is supplied in 7 conditions, soft to hard. N is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Cheapest condition for non-critical, low-stress castings; coarse dendritic structure and residual stress mean lower ductility and impact. | 265 | 500 | 14 | 155 HB | — |
Solution annealed | Pick when maximum machinability, lowest residual stress and dimensional stability matter more than strength. | 280 | 510 | 23 | 150 HB | — |
Stress relieved | Post-weld or post-rough-machining treatment to stabilize dimensions; mechanical properties stay close to the prior condition. | 290 | 530 | 23 | 158 HB | 10 % IACS |
Normalized and tempered | Choose for pressure parts and welded castings needing lower residual stress and better notch toughness than plain normalized. | 295 | 525 | 24 | 156 HB | — |
NDefault Normalized | Standard delivery condition for structural and pressure castings: refines the as-cast structure and reliably meets the 270/500 MPa spec. | 300 | 540 | 22 | 160 HB | — |
Surface hardened | Local hardening of tooth flanks, rails or wear pads on an otherwise normalized casting; core stays tough. | 300 | 540 | 20 | 48 HRC | 10 % IACS |
Quenched and tempered | Used on thin-to-medium sections when higher yield and wear resistance are needed; low hardenability limits the benefit in heavy walls. | 420 | 640 | 18 | 15 HRC | — |
What is ZG270-500?
ZG270-500 is a medium-strength cast carbon steel to GB/T 11352, rated 270 MPa minimum yield and 500 MPa minimum tensile and comparable to ASTM WCB. Default values are 300 MPa yield, 540 MPa tensile, 22 % elongation, 160 HB (84 HRB), service to 425 °C, machinability 58 and weldability 72, with as-cast, annealed, normalized, normalized and tempered, stress-relieved, quenched and tempered or surface-hardened conditions on file. It is a common choice for general structural and pressure-part castings that also need weld repair. It has no corrosion resistance and requires coating; step down to ZG230-450 for easier machining. ZG270-500 has a density of 7.83 g/cm³ (0.283 lb/in³), lighter than 80% of steel grades. It melts at 1,425°C (2,597 °F). ZG270-500 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 540 MPa (78.3 ksi) — weaker than 86% of steel grades. Elongation at break is 22% and the elastic modulus is 202 GPa (29.3 Msi).
What is ZG270-500 used for?
- valve bodies
- pump housings
- gears
- structural machine parts
Advantages
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- Conducts heat well — 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades
- Readily welded — 72/100, better than 75% of steel grades
Limitations
- Low strength — 300 MPa (43.5 ksi), worse than 86% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
ZG270-500 properties
Typical room-temperature values for ZG270-500-N; bars are the position among steel grades.
Physical3
ZG270-500 has a density of 7.83 g/cm³ (0.283 lb/in³), lighter than 80% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
ZG270-500 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 540 MPa (78.3 ksi) — weaker than 86% of steel grades. Elongation at break is 22% and the elastic modulus is 202 GPa (29.3 Msi).
Thermal6
ZG270-500 is rated for continuous service to 425°C (797 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
ZG270-500 conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of ZG270-500 takes about 26 MJ of energy and emits 2 kg of CO₂ — less than 64% of steel grades. Typical recycled content is 85%.
Manufacturability8
ZG270-500's machinability is good (58/100, better than 75% of steel grades); weldability very good (72/100); formability poor (25/100).
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. ZG270-500 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ZG270-500
Is ZG270-500 easy to machine?
Machines like normalized 1035 steel (~60 % of 1212); use rigid setups and carbide tooling, and expect scattered hard spots/sand inclusions in the as-cast skin.
Can ZG270-500 be welded?
Readily welded with E7018/ER70S-6; preheat 100–150 °C above ~25 mm section and post-weld stress relieve at 600–650 °C for repaired or heavily welded castings.
Can ZG270-500 be formed, bent or molded?
Sand or shell cast at ~1560–1600 °C with generous risers and chills — solidification shrinkage ≈2 % and hot-tear sensitivity require good feeding design; not a cold-formed product.
ZG270-500 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 11352-2009 upper limit; typical 0.31–0.40 | ≤ 0.4 | 0.35 |
| Si | ≤ 0.6 | 0.35 |
| Mn | ≤ 0.9 | 0.65 |
| S | ≤ 0.04 | 0.02 |
| P | ≤ 0.04 | 0.02 |
| Niresidual element | ≤ 0.3 | |
| Crresidual element | ≤ 0.35 | |
| Curesidual element | ≤ 0.3 | |
| Moresidual element | ≤ 0.2 | |
| Vresidual element; total residuals ≤1.00 % | ≤ 0.05 | |
| Fe | balance |
What surface finishes work on ZG270-500?
No anodizing; shot blast then paint, phosphate, zinc plate or hot-dip galvanize for corrosion protection — porosity limits mirror polishing.
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 ZG270-500 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- GB/T 11352
- Also called
- ZG35
How much does ZG270-500 cost?
ZG270-500 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.
ZG270-500 — frequently asked
What is ZG270-500 used for?
ZG270-500 is typically used for valve bodies, pump housings, gears and structural machine parts. In short: medium-strength WCB equivalent; balanced strength and ductility; weld-repairable pressure castings.
What is the yield strength of ZG270-500?
ZG270-500 has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 540 MPa (78.3 ksi) — weaker than 86% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is ZG270-500 easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Machines like normalized 1035 steel (~60 % of 1212); use rigid setups and carbide tooling, and expect scattered hard spots/sand inclusions in the as-cast skin.
Can ZG270-500 be welded?
Yes — weldability is rated very good (72/100). Readily welded with E7018/ER70S-6; preheat 100–150 °C above ~25 mm section and post-weld stress relieve at 600–650 °C for repaired or heavily welded castings.
What surface finishes work on ZG270-500?
No anodizing; shot blast then paint, phosphate, zinc plate or hot-dip galvanize for corrosion protection — porosity limits mirror polishing.
Can ZG270-500 be formed, bent or molded?
Sand or shell cast at ~1560–1600 °C with generous risers and chills — solidification shrinkage ≈2 % and hot-tear sensitivity require good feeding design; not a cold-formed product.
What is the maximum service temperature of ZG270-500?
ZG270-500 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 ZG270-500-N and ZG270-500-F?
N is the default condition — standard delivery condition for structural and pressure castings: refines the as-cast structure and reliably meets the 270/500 MPa spec. F: cheapest condition for non-critical, low-stress castings; coarse dendritic structure and residual stress mean lower ductility and impact. Yield strength is 300 MPa in N versus 265 MPa in F.
How much does ZG270-500 cost?
ZG270-500 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 A216/A216M Carbon Steel Castings for High-Temperature Service (WCB) — ASTM (2018)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (Steel Castings) — ASM International (1990)
- Steel Castings Handbook — SFSA / ASM International (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.