Steel 30KhGSL
GOST 30KhGSL
30KhGSL is a chromium-manganese-silicon cast alloy steel to GOST 977, supplied as-cast, annealed, normalized, N+T, quenched and tempered (QT500/QT600) or stress relieved.
Reference datasheet — 30KhGSL 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
30KhGSL tempers and conditions
30KhGSL is supplied in 7 conditions, soft to hard. N+T 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 |
|---|---|---|---|---|---|---|
Solution annealed | Chosen for maximum machinability and stress relief before final quench-and-temper. | 320 | 560 | 18 | 11 HRC | 8 % IACS |
Stress relieved | Used after weld repair or rough machining of large castings to remove residual stress without changing strength much. | 370 | 610 | 12 | 15 HRC | 7.8 % IACS |
Spheroidize annealed | Rough/unstressed castings only; coarse dendritic structure with residual casting stresses and low toughness. | 380 | 620 | 8 | 19 HRC | 7.8 % IACS |
N+TDefault Normalized and tempered | Standard supply condition for GOST 977 structural castings — balanced strength, ductility and impact toughness. | 430 | 650 | 15 | 207 HB | — |
Normalized | Grain refinement of the as-cast structure; intermediate step or economical condition for lightly loaded castings. | 450 | 700 | 12 | 20 HRC | 7.7 % IACS |
Q&T | Main high-duty condition: sorbitic structure giving ~800 MPa UTS with retained toughness for shafts, levers and mining parts. | 640 | 820 | 12 | 25 HRC | — |
Q&T | Selected when maximum strength/wear resistance is needed and section sizes are moderate; toughness drops noticeably. | 830 | 1,000 | 9 | 33 HRC | — |
What is 30KhGSL?
30KhGSL is a chromium-manganese-silicon cast alloy steel to GOST 977, supplied as-cast, annealed, normalized, N+T, quenched and tempered (QT500/QT600) or stress relieved. Default properties are 430 MPa yield, 650 MPa tensile, 15 % elongation and about 207 HB, with a machinability score of 48, which suits heavy structural and machine-part castings. Carbon equivalent is high (CE ≈ 0.7–0.8), so weldability is limited and preheat plus post-weld tempering is mandatory; service is capped near 400 °C and there is no corrosion resistance. SCCrM1 is the nearest widely stocked Cr-Mo casting grade. 30KhGSL has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F). 30KhGSL has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 650 MPa (94.3 ksi) — weaker than 51% of steel grades. Elongation at break is 15% and the elastic modulus is 205 GPa (29.7 Msi).
What is 30KhGSL used for?
- Heavy machinery structural castings
- Tank/vehicle components
- Gear blanks
Limitations
- Limited formability — 15/100, worse than 87% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
- Low fracture toughness — 65 MPa·√m (59.2 ksi·√in), worse than 75% of steel grades
30KhGSL properties
Typical room-temperature values for 30KhGSL-N+T; bars are the position among steel grades.
Physical3
30KhGSL has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical16
30KhGSL has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 650 MPa (94.3 ksi) — weaker than 51% of steel grades. Elongation at break is 15% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
30KhGSL is rated for continuous service to 400°C (752 °F). It conducts heat at 38 W/m·K (22 BTU/hr·ft·°F), worse than 69% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
30KhGSL conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 30KhGSL takes about 27 MJ of energy and emits 2.1 kg of CO₂ — less than 59% of steel grades. Typical recycled content is 70%.
Manufacturability8
30KhGSL's machinability is fair (48/100, worse than 57% of steel grades); weldability fair (40/100); 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. 30KhGSL is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 30KhGSL
Is 30KhGSL easy to machine?
Machine in the annealed or N+T condition with carbide tooling at moderate speeds; hard skin and sand inclusions on the as-cast surface dull tools quickly, so take a heavy first cut.
Can 30KhGSL be welded?
Limited weldability (CE ≈ 0.7–0.8): use low-hydrogen consumables, 250–350 °C preheat, controlled interpass and a 600–650 °C post-weld temper to avoid HAZ cracking.
Can 30KhGSL be formed, bent or molded?
Sand or shell casting with generous risering and chills; the Cr-Mn-Si chemistry is hot-tear and shrinkage sensitive, so keep uniform sections and avoid abrupt junctions.
30KhGSL 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 | 0.25 – 0.35 | 0.3 |
| Si | 0.6 – 0.8 | 0.7 |
| Mn | 0.9 – 1.2 | 1.05 |
| Cr | 0.6 – 0.9 | 0.75 |
| Niresidual | ≤ 0.3 | |
| Curesidual | ≤ 0.3 | |
| S | ≤ 0.04 | |
| P | ≤ 0.04 | |
| Fe | balance |
What surface finishes work on 30KhGSL?
Not anodizable — protect by shot blasting followed by phosphating, zinc-rich primer/paint or hard chrome/nitriding on wear surfaces.
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 30KhGSL cost?
30KhGSL 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.
30KhGSL — frequently asked
What is 30KhGSL used for?
30KhGSL is typically used for heavy machinery structural castings, tank/vehicle components and gear blanks. In short: GOST high-strength cast steel; limited weldability, high CE; best machinability in family.
What is the yield strength of 30KhGSL?
30KhGSL has a typical yield strength of 430 MPa (62.4 ksi) and a tensile strength of 650 MPa (94.3 ksi) — weaker than 51% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is 30KhGSL easy to machine?
Reasonably — machinability is rated fair (48/100, worse than 57% of steel grades). Machine in the annealed or N+T condition with carbide tooling at moderate speeds; hard skin and sand inclusions on the as-cast surface dull tools quickly, so take a heavy first cut.
Can 30KhGSL be welded?
With care — weldability is rated fair (40/100). Limited weldability (CE ≈ 0.7–0.8): use low-hydrogen consumables, 250–350 °C preheat, controlled interpass and a 600–650 °C post-weld temper to avoid HAZ cracking.
What surface finishes work on 30KhGSL?
Not anodizable — protect by shot blasting followed by phosphating, zinc-rich primer/paint or hard chrome/nitriding on wear surfaces.
Can 30KhGSL be formed, bent or molded?
Sand or shell casting with generous risering and chills; the Cr-Mn-Si chemistry is hot-tear and shrinkage sensitive, so keep uniform sections and avoid abrupt junctions.
What is the maximum service temperature of 30KhGSL?
30KhGSL 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 30KhGSL N+T and 30KhGSL-QT500?
N+T is the default condition — standard supply condition for GOST 977 structural castings — balanced strength, ductility and impact toughness. QT500: selected when maximum strength/wear resistance is needed and section sizes are moderate; toughness drops noticeably. Yield strength is 430 MPa in N+T versus 830 MPa in QT500.
How much does 30KhGSL cost?
30KhGSL 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
- GOST 977-88 — Steel castings. General specifications — Gosstandart (1988)
- Marochnik stalej i splavov — 30ХГСЛ cast steel data sheet — Marochnik (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys (cast low-alloy steels) — ASM International (1990)
- GB/T 14408 / GB/T 5680 low-alloy steel castings (comparison grade ZG30CrMnSi) — SAC (2014)
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.