Steel SCM415-CR (Cold rolled)
Supply condition
JIS SCM415
Cold-rolled strip/sheet for stamped and cold-formed parts that will be case hardened.
Values for the CR condition
Other SCM415 tempers and conditions
SCM415 is listed in 7 conditions; see the grade overview at SCM415.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Temper | Softest condition — choose for heavy machining, cold heading or deep forming before carburizing. | 350 | 540 | 27 | 156 HB | — |
HRDefault Hot rolled | Standard as-rolled bar stock for machining and subsequent carburizing heat treatment. | 430 | 640 | 22 | 180 HB | 7.8 % IACS |
Heat Treat State | Uniform fine-grain structure before machining/carburizing; best machinability-to-distortion balance. | 440 | 630 | 23 | 180 HB | 7.8 % IACS |
CRThis page Cold rolled | Cold-rolled strip/sheet for stamped and cold-formed parts that will be case hardened. | 570 | 700 | 14 | 205 HB | 7.8 % IACS |
Cold drawn | Cold-drawn bar with tight tolerance and bright surface for automatic-lathe parts and pins. | 600 | 720 | 13 | 215 HB | — |
Quenched and tempered | Through-hardened core condition per JIS G 4053 (≥830 MPa UTS) for shafts and fasteners not requiring a carburized case. | 700 | 880 | 18 | 26 HRC | — |
Carburized, quenched & tempered (case hardened) | The intended service condition: 58–62 HRC wear-resistant case over a tough ~30–40 HRC core for gears, cams and pins. | 780 | 1,000 | 12 | 60 HRC | — |
What is SCM415-CR?
SCM415-CR is SCM415 supplied in the CR condition — cold-rolled strip/sheet for stamped and cold-formed parts that will be case hardened. SCM415-CR has a yield strength of 570 MPa (82.7 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 74% of steel grades. Elongation at break is 14% and the elastic modulus is 206 GPa (29.9 Msi). SCM415-CR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,430°C (2,606 °F). HR is the default condition FabDigit quotes; CR is available on request or by drawing note.
Advantages
- Easy to machine — 62/100, better than 89% of steel grades
Limitations
- Limited ductility — 14%, worse than 75% of steel grades
SCM415-CR properties
Typical room-temperature values for SCM415-CR; 22 are specific to this condition. Other listed values are SCM415 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
SCM415-CR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,430°C (2,606 °F).
Mechanical16
SCM415-CR has a yield strength of 570 MPa (82.7 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 74% of steel grades. Elongation at break is 14% and the elastic modulus is 206 GPa (29.9 Msi).
Thermal6
SCM415-CR is rated for continuous service to 400°C (752 °F). It conducts heat at 44 W/m·K (25.4 BTU/hr·ft·°F), better than 57% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
SCM415-CR 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 SCM415-CR takes about 27 MJ of energy and emits 2.1 kg of CO₂ — less than 59% of steel grades. Typical recycled content is 30%.
Manufacturability7
SCM415-CR's machinability is good (62/100, better than 89% of steel grades); weldability fair (52/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with SCM415-CR
Is SCM415 easy to machine?
Machine in annealed or normalized state (≈60 % of AISI 1212); use carbide, moderate speeds and rigid setups, then grind after carburizing to correct heat-treat distortion.
Can SCM415 be welded?
Weldable before carburizing with low-hydrogen consumables and 150–250 °C preheat plus post-weld stress relief; welding a carburized case is not permitted.
Can SCM415 be formed, bent or molded?
Good cold heading and forging behaviour in the annealed/spheroidized condition; hot forge 1150–850 °C followed by normalizing.
What surface finishes work on SCM415?
Not anodizable — protect with phosphating + oil, black oxide, zinc or Cr plating; carburized surfaces are usually ground/honed and shot-peened for fatigue life.
SCM415 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 | 0.13 – 0.18 | 0.15 |
| Si | 0.15 – 0.35 | 0.25 |
| Mn | 0.6 – 0.85 | 0.72 |
| P | ≤ 0.03 | — |
| S | ≤ 0.03 | — |
| Niresidual, max | ≤ 0.25 | — |
| Cr | 0.9 – 1.2 | 1.05 |
| Mo | 0.15 – 0.3 | 0.22 |
| Curesidual, max | ≤ 0.3 | — |
| Fe | balance | — |
SCM415-CR — frequently asked
What is SCM415-CR used for?
SCM415-CR is typically used for gears, industrial drive shafts and pins. In short: carburizing chrome-moly bar.
What is the yield strength of SCM415-CR?
SCM415-CR has a typical yield strength of 570 MPa (82.7 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 74% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is SCM415-CR easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% of steel grades). Machine in annealed or normalized state (≈60 % of AISI 1212); use carbide, moderate speeds and rigid setups, then grind after carburizing to correct heat-treat distortion.
Can SCM415-CR be welded?
With care — weldability is rated fair (52/100). Weldable before carburizing with low-hydrogen consumables and 150–250 °C preheat plus post-weld stress relief; welding a carburized case is not permitted.
What surface finishes work on SCM415-CR?
Not anodizable — protect with phosphating + oil, black oxide, zinc or Cr plating; carburized surfaces are usually ground/honed and shot-peened for fatigue life.
Can SCM415-CR be formed, bent or molded?
Good cold heading and forging behaviour in the annealed/spheroidized condition; hot forge 1150–850 °C followed by normalizing.
What is the maximum service temperature of SCM415-CR?
SCM415-CR 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 SCM415-HR and SCM415-CD?
HR is the default condition — standard as-rolled bar stock for machining and subsequent carburizing heat treatment. CD: cold-drawn bar with tight tolerance and bright surface for automatic-lathe parts and pins. Yield strength is 430 MPa in HR versus 600 MPa in CD.
Can FabDigit make parts in SCM415-CR?
Yes — SCM415-CR is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- JIS G 4053 — Low-alloyed steels for machine structural use — JSA (2016)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.4 — Heat Treating (carburizing of Cr-Mo steels) — ASM International (1991)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.