case harden steel

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SCM415 Steel | 15CrMo5 | 1.7262

SCM415 steel 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 round bars chemical composition by %,maximum

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


SCM415 round bars mechanical properties

Grade Delivery State T.S.
(annealing or tempering) HB,max
Forging ratio Grain Size
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


 SCM415 steel Heat treatment Related

  • Forging Of SCM415 steel-hot work alloy Alloy steel

Heat to 900-1100 °C(1652-2012°F),forged temperature not below 843°(1550°F)


  • Annealing of SCM415 Alloy steel

Slowly heated to 800~850 ℃(1472~1562°F) and allow enough times, let the steel to be thoroughly heated, Then cool slowly at Maximum of 4°C(40°F)per hours. The SCM415 Alloy  steel will get MAX 235 HB (Brinell hardness).


  • Hardening of SCM415 Case Harden steel

SCM415 steels should be heated uniformly to 840-875°C (1544-1607°F) until completely heated through. If needed, the steels can be preheated at 300-500°C (572-932°F). About 30 min/per 25 mm of ruling section is to be provided and then the steels should be immediately quenched in oil.


  • Tempering of SCM415 Alloy steel

Tempering of SCM415 steels is performed at 500-700°C (932-1292°F), Soak well at the selected temperature and soak for at least one hour per 25mm of total thickness. Then cool in air. Low Tempering is not advised as tempering within this range will seriously reduce the impact value. (250-375°C)


E Steel Sdn Bhd are Malaysia steel supplier/stockist providing raw materials to the wide arrays of engineering industries/sectors.

We supply  full range of Carbon Steel sheets, Carbon steel round bar , Carbon steel rod, Carbon steel plate,  Alloy steel , hardened steel , Case Hardened Steel ,Special Steel ,Tool Steel ,Case harden Steel

Grades : ASTM a105, s45c , s50c, AISI4140, AISI4340, AISI4130, 5919, 6587, ASSAB709, ASSAB705 , SCM415, 7210, SCM440, 5920, 8620