Steel ZG35CrMnSi
ZG35CrMnSi is a 0.35 % C chromium–manganese–silicon low-alloy cast steel (GB casting designation) that develops high strength and wear resistance through quenching and tempering.
Reference datasheet — ZG35CrMnSi 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
ZG35CrMnSi tempers and conditions
ZG35CrMnSi is supplied in 8 conditions, soft to hard. N+T 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 |
|---|---|---|---|---|---|---|
Solution annealed | Softest condition — pick it for rough machining of large castings before final quench and temper. | 340 | 610 | 19 | 180 HB | — |
As fabricated | Cheapest condition for non-critical or later-heat-treated castings; coarse dendritic structure and high residual stress. | 390 | 660 | 8 | 19 HRC | 7.5 % IACS |
Stress relieved | Used after weld repair or heavy rough machining to remove residual stress without changing strength much. | 400 | 680 | 12 | 15 HRC | 7.5 % IACS |
N+TDefault Normalized and tempered | Standard supply condition to GB/T 14408 — balanced strength, ductility and toughness for general structural castings. | 460 | 760 | 15 | 20 HRC | — |
Normalized | Grain refinement and homogenization of the as-cast structure; usually followed by tempering. | 500 | 800 | 13 | 22 HRC | 7.4 % IACS |
Q&T 240–280 HB | General quenched-and-tempered condition when higher yield strength with retained toughness is needed in medium sections. | 700 | 900 | 12 | 26 HRC | — |
Q&T 300–340 HB | Higher-strength wear condition for crusher, excavator and mining castings where impact loads are moderate. | 850 | 1,050 | 9 | 34 HRC | — |
Q&T 42–48 HRC | Maximum-hardness wear condition for liners, jaws and shovel teeth; low toughness, avoid high-impact or notched service. | 1,250 | 1,500 | 5 | 45 HRC | — |
What is ZG35CrMnSi?
ZG35CrMnSi is a 0.35 % C chromium–manganese–silicon low-alloy cast steel (GB casting designation) that develops high strength and wear resistance through quenching and tempering. Normalized and tempered it gives 460 MPa yield, 760 MPa tensile, 15 % elongation and 217 HB (20 HRC), and quench-and-temper conditions on file reach 320 HB or 45 HRC for wear faces, which suits mining and earthmoving castings. The trade-offs are a carbon equivalent of about 0.7–0.8 that makes welding demanding, machinability of only 45, service limited to roughly 400 °C and no corrosion resistance. ZG35CrMnSi has a density of 7.82 g/cm³ (0.283 lb/in³), lighter than 82% of steel grades. It melts at 1,420°C (2,588 °F). ZG35CrMnSi has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 55% of steel grades. Elongation at break is 15% and the elastic modulus is 205 GPa (29.7 Msi).
What is ZG35CrMnSi used for?
- mining equipment castings
- excavator parts
- wear-resistant heavy machinery components
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
ZG35CrMnSi properties
Typical room-temperature values for ZG35CrMnSi-N+T; bars are the position among steel grades.
Physical3
ZG35CrMnSi has a density of 7.82 g/cm³ (0.283 lb/in³), lighter than 82% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical17
ZG35CrMnSi has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 55% of steel grades. Elongation at break is 15% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ZG35CrMnSi is rated for continuous service to 400°C (752 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 64% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
ZG35CrMnSi conducts electricity at 7.5 % IACS, worse than 67% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of ZG35CrMnSi takes about 26 MJ of energy and emits 2.1 kg of CO₂ — less than 64% of steel grades. Typical recycled content is 85%.
Manufacturability7
ZG35CrMnSi's machinability is fair (45/100, worse than 65% of steel grades); weldability fair (35/100); 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. ZG35CrMnSi is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ZG35CrMnSi
Is ZG35CrMnSi easy to machine?
Machine in the annealed or N+T state with rigid setups and carbide tooling; expect abrasive scale and sand inclusions on unmachined cast surfaces, so take a heavy first cut.
Can ZG35CrMnSi be welded?
Weldable only with care — CE ≈ 0.7–0.8, so preheat 200–300 °C, use low-hydrogen electrodes and stress-relieve or re-temper at 600–650 °C after welding.
Can ZG35CrMnSi be formed, bent or molded?
Sand or shell cast with generous risering and controlled cooling; the Si–Mn content raises hot-tearing risk at section changes, so fillet all junctions and use chills on heavy bosses.
ZG35CrMnSi 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 |
|---|---|---|
| C | 0.3 – 0.4 | 0.35 |
| Si | 0.5 – 0.75 | 0.62 |
| Mn | 0.9 – 1.2 | 1.05 |
| Cr | 0.5 – 0.8 | 0.65 |
| Niresidual | ≤ 0.3 | |
| Curesidual | ≤ 0.3 | |
| Moresidual | ≤ 0.15 | |
| Pimpurity max | ≤ 0.04 | |
| Simpurity max | ≤ 0.04 | |
| Fe | balance |
What surface finishes work on ZG35CrMnSi?
Shot blast then prime — the steel rusts quickly; zinc-rich primer, painting, hard chrome or thermal-spray overlays are used, and flame or induction hardening can be applied to wear faces.
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
How much does ZG35CrMnSi cost?
ZG35CrMnSi 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.
ZG35CrMnSi — frequently asked
What is ZG35CrMnSi used for?
ZG35CrMnSi is typically used for mining equipment castings, excavator parts and wear-resistant heavy machinery components. In short: high-strength wear casting; hardenable to 45 HRC; weld with strict preheat.
What is the yield strength of ZG35CrMnSi?
ZG35CrMnSi has a typical yield strength of 460 MPa (66.7 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 55% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is ZG35CrMnSi easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machine in the annealed or N+T state with rigid setups and carbide tooling; expect abrasive scale and sand inclusions on unmachined cast surfaces, so take a heavy first cut.
Can ZG35CrMnSi be welded?
With care — weldability is rated fair (35/100). Weldable only with care — CE ≈ 0.7–0.8, so preheat 200–300 °C, use low-hydrogen electrodes and stress-relieve or re-temper at 600–650 °C after welding.
What surface finishes work on ZG35CrMnSi?
Shot blast then prime — the steel rusts quickly; zinc-rich primer, painting, hard chrome or thermal-spray overlays are used, and flame or induction hardening can be applied to wear faces.
Can ZG35CrMnSi be formed, bent or molded?
Sand or shell cast with generous risering and controlled cooling; the Si–Mn content raises hot-tearing risk at section changes, so fillet all junctions and use chills on heavy bosses.
What is the maximum service temperature of ZG35CrMnSi?
ZG35CrMnSi 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 ZG35CrMnSi N+T and ZG35CrMnSi-A?
N+T is the default condition — standard supply condition to GB/T 14408 — balanced strength, ductility and toughness for general structural castings. A: softest condition — pick it for rough machining of large castings before final quench and temper. Yield strength is 460 MPa in N+T versus 340 MPa in A.
How much does ZG35CrMnSi cost?
ZG35CrMnSi 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 low-alloy steels) — ASM International (1990)
- ASTM A148/A148M — Steel Castings, High Strength, for Structural Purposes — ASTM (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.