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  • Carbon welded steel pipe,ASTM A106 steel pipe,Hollow section

SCM 415 Alloy Steel

Category : Special Steel

Standard and Grade : SCM 415

Size :

Diameter :80 to 600 mm

Length : 1000 to 9000 mm

  • Description
  • Specification
  • Standard
  • Process
  • Packing

SCM415 whose surface are processed through carburizing hardening treatment are used for the parts which need high toughness or wear resistance, such as cylinder piston, crankshaft, gears, pin, shafts and so on.

SCM415 Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon, Oil Quenched & Tempered Hardenss is 28-34 HRc.SCM415 Annealing delivery hardenss less than 250HB.

Chemical composition











max 0.035




Mechanical properties

Tensile strength (kgf/mm²): ≧85

Elongation (%): ≧16

Cross section reduction rate (%): ≧40

Impact value (J/cm2): ≧7

Hardness (Hb) : 235~321


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


Product Features:

1. High strength in room temperature and elevated temperature.

2. High notch tolerance.

3. Simplified design for bolting configuration


Conditions of heat treatment

Annealing: 850℃ Furnace Cooling

Normalization: 850~900℃ Air Cooling

Hardening: 850~900℃ 1st Oil Cooling, 800~850℃ 2rd Oil Cooling

Tempering: 150~200℃ Air Cooling


Criterion for heat treating conditions revise:

Ac: 770~835℃

Ar: 770~700℃

Ms: 410℃

Forming Option

1 Hot rolling process

2 Hot Forging: Electro-hydraulic; High-speed-hydraulic; Oil-hydraulic; Precision-forging


Heat-treatment Option

1 +A: Annealed (full/soft/spheroidizing)

2 +N: Normalized

3 +NT: Normalized and tempered

4 +QT: Quenched and tempered (water/oil)


Surface Option

1 Black Surface

2 Grounded: Bright but rough ; Not precision

3 Machining for plate: Bright and precision; Little turning scar

4 Peeled/Turned: Bright and precision; Little turning scar

5 Polished: Very Bright and precision size; Not turning scar


Other Services

1 Cutting: Small pieces

2 CNC Machine: Produce as your drawing

3 Package: Bare/Nylon/Canvas/Wooden

4 Payment:T/T, L/C, O/A(request credit)

5 Transport:FOB/CFR/CIF/DDU/DDP (train/ship/Air)


Mill test certificate

EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.

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