SCM415 Round Bar is a kind of Low carbon and Cr-Mo heat treated by surface hardening process, use for gears and wear resistant parts with tough cores.
SCM415 Steel is one of the most common used low-carbon alloy steel , carbon content around 0.15% +/-.
In general , it is carburized for use. JIS SCM415 can be said to have higher strength compared to S45C (760 Medium Carbon Steel) or SCM440 , and surface hardness should be around 55HRC to 60HRC for use.
| Grade | C | Si | Mn | P | S | Ni | Cr | Mo |
| JIS G4053 SCM415 | 0.13-0.18 | 0.15-0.35 | 0.6-0.9 | ≤0.03 | ≤0.03 | ≤0.25 | 0.9-1.2 | 0.15-0.25 |
| Grade | Delivery State |
T.S. N/mm2 Min |
Y.S. N/mm2 Min |
A,% Min |
Z,% Min |
Hardness, (annealing or tempering) HB,max |
Forging ratio |
Grain Size (level) |
Nonmetal ratio |
| JIS G4053 SCM415 | Hot rolled, forged, or heat treatment | 834 | – | 16 | 40 | 235-321 | ≥ 4:1 | ≥ 6 | ≤ 2.0 |
SCM415 steel is a alloy structural steel. It is used for engineering structural, like high tensile shafts, bolts and nuts, gears, pinions and spindles. Locomotive traction with the big gear, supercharger drive gear, pressure vessel, rear axle, gear load of connecting rod and a spring clip,SCM415 can also be used to under 2000 m deep well of oil drill pipe joint and the fishing Alloy, and can be used for bending machine mould, etc
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