Steel SCCrM1
SCCrM1 is a chromium-molybdenum cast alloy steel in the JIS G5111 family, developing its strength and toughness through heat treatment of the casting.
Reference datasheet — SCCrM1 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 QT condition
SCCrM1 tempers and conditions
SCCrM1 is supplied in 5 conditions, soft to hard. QT 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 |
|---|---|---|---|---|---|---|
Solution annealed | Pick for rough machining, dimensional stabilizing or intermediate condition before final quench and temper; does not meet JIS G5111 strength requirements. | 380 | 620 | 22 | 175 HB | — |
Normalized and tempered | Economical route for thick or complex castings where quenching risks cracking; meets the JIS minimum with slightly lower toughness through-section than Q&T. | 590 | 790 | 15 | 229 HB | — |
Stress relieved | Applied after weld repair or heavy machining of Q&T castings to relieve residual stress with minimal loss of tempered properties. | 620 | 810 | 17 | 22 HRC | 7.5 % IACS |
QTDefault Quenched and tempered | Default supply condition: best strength/toughness balance for gearboxes, links, brackets and valve bodies; specify section size so hardenability is respected. | 640 | 830 | 16 | 23 HRC | — |
Quenched and low-temperature tempered | Choose when higher wear resistance and strength are needed in thinner sections; toughness and machinability drop noticeably. | 830 | 1,000 | 12 | 32 HRC | — |
What is SCCrM1?
SCCrM1 is a chromium-molybdenum cast alloy steel in the JIS G5111 family, developing its strength and toughness through heat treatment of the casting. Default properties are 640 MPa yield, 830 MPa tensile, 16 % elongation and about 240 HB (23 HRC); conditions on file include annealed, normalized-and-tempered, quenched-and-tempered (including 30–35 HRC) and stress relieved, in sand or shell cast form. Limits are roughly 400 °C maximum service temperature, no inherent corrosion resistance, and only moderate machinability and weldability (both scored 45), so preheat and controlled cutting speeds are needed. SCCrM3 is the next step up in strength. SCCrM1 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). SCCrM1 has a yield strength of 640 MPa (92.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 79% of steel grades. Elongation at break is 16% and the elastic modulus is 205 GPa (29.7 Msi).
What is SCCrM1 used for?
- Machine tool bases
- Gear housings
- Heavy structural castings
Advantages
- High strength — 640 MPa (92.8 ksi), better than 79% of steel grades
Limitations
- Limited formability — 15/100, worse than 87% of steel grades
SCCrM1 properties
Typical room-temperature values for SCCrM1-QT; bars are the position among steel grades.
Physical3
SCCrM1 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical15
SCCrM1 has a yield strength of 640 MPa (92.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 79% of steel grades. Elongation at break is 16% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
SCCrM1 is rated for continuous service to 400°C (752 °F). It conducts heat at 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 56% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
SCCrM1 conducts electricity at 7.5 % IACS, worse than 67% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (14/100), better than 70% of steel grades.
Sustainability4
Producing a kilogram of SCCrM1 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 85%.
Manufacturability8
SCCrM1's machinability is fair (45/100, worse than 65% 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. SCCrM1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with SCCrM1
Is SCCrM1 easy to machine?
Machine in the annealed or N+T condition where possible; at 240 HB use rigid setups, coated carbide, 80–140 m/min and watch for hard spots and residual sand skin.
Can SCCrM1 be welded?
Weldable with low-hydrogen E/ER 80S-D2 or matching Cr-Mo filler; preheat 200–300 °C, keep interpass temperature and apply post-weld temper/stress relief at 600–650 °C.
Can SCCrM1 be formed, bent or molded?
Sand or shell cast with generous risering and 2 % shrink allowance; avoid abrupt section changes, and always heat treat (N+T or Q&T) before service.
SCCrM1 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 | ≤ 0.6 | 0.4 |
| Mn | ≤ 0.9 | 0.7 |
| Pimpurity limit | ≤ 0.04 | |
| Simpurity limit | ≤ 0.04 | |
| Cr | 0.8 – 1.2 | 1 |
| Mo | 0.15 – 0.35 | 0.25 |
| Fe | balance |
What surface finishes work on SCCrM1?
Shot blast to remove scale, then phosphate + paint, zinc/nickel plating or hard chrome; nitriding or induction hardening can be used locally for 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 SCCrM1 cost?
SCCrM1 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.
SCCrM1 — frequently asked
What is SCCrM1 used for?
SCCrM1 is typically used for machine tool bases, gear housings and heavy structural castings. In short: baseline JIS Cr-Mo casting; weldable with preheat; tougher than plain cast steel.
What is the yield strength of SCCrM1?
SCCrM1 has a typical yield strength of 640 MPa (92.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 79% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is SCCrM1 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machine in the annealed or N+T condition where possible; at 240 HB use rigid setups, coated carbide, 80–140 m/min and watch for hard spots and residual sand skin.
Can SCCrM1 be welded?
With care — weldability is rated fair (45/100). Weldable with low-hydrogen E/ER 80S-D2 or matching Cr-Mo filler; preheat 200–300 °C, keep interpass temperature and apply post-weld temper/stress relief at 600–650 °C.
What surface finishes work on SCCrM1?
Shot blast to remove scale, then phosphate + paint, zinc/nickel plating or hard chrome; nitriding or induction hardening can be used locally for wear surfaces.
Can SCCrM1 be formed, bent or molded?
Sand or shell cast with generous risering and 2 % shrink allowance; avoid abrupt section changes, and always heat treat (N+T or Q&T) before service.
What is the maximum service temperature of SCCrM1?
SCCrM1 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 SCCrM1-QT and SCCrM1-A?
QT is the default condition — default supply condition: best strength/toughness balance for gearboxes, links, brackets and valve bodies; specify section size so hardenability is respected. A: pick for rough machining, dimensional stabilizing or intermediate condition before final quench and temper; does not meet JIS G5111 strength requirements. Yield strength is 640 MPa in QT versus 380 MPa in A.
How much does SCCrM1 cost?
SCCrM1 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
- JIS G5111 — Structural steel castings for high temperature/low alloy — JSA (2019)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Steel Castings Handbook, 6th ed. — SFSA / ASM International (1995)
- ASM Handbook Vol.19 — Fatigue and Fracture — ASM International (1996)
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.