SCM415 Alloy Steel Service

Carburizing structural steel / Precision steel bar, steel plate, steel tube and professional steel-related services supplier

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JFS Steel's SCM415 and Steel Machining Service

Ju Feng Special Steel Co., Ltd. is an industrial steel materials, steel parts and steel-related services supplier from Taiwan. Along with steel bars, steel plates and steel tubes supply, steel cutting, drilling, machining and heat treatment services are also provided.

JFS Steel has been offering customers SCM415 Alloy Steel and precision steel machining services since 2006. With both highly skilled technology and 47 years experience, JFS Steel always makes sure to meet each customer's demand.


Alloy Steel

Equivalent Grades: GB 15CrMo, JIS SCM415, DIN 15CrMo5. 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.

Carburizing structural steel


SCM415 is widely used in general structural steel.

Product Features:

1. High strength in room temperature and elevated temperature.
2. High notch tolerance.
3. Simplified design for bolting configuration

International Comparison of Materials




**This comparison table is for reference only. The standards and grades of various countries have slightly different chemical compositions. Please refer to the database for details.**

Chemical Composition(JIS G4051)


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℃

Mechanical properties

Tensile strength (kgf/mm²): ≧85
Elongation (%): ≧16
Cross section reduction rate (%): ≧40
Impact value (J/cm2): ≧7
Hardness (Hb) : 235~321

Size Range

Round Bar13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 45, 46, 48, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 315, 325, 335, 345, 355, 365, 375, 385, 395, 405, 415, 425, 435, 445, 455, 465, 475, 485, 495, 505, 515, 525, 535, 545, 555, 565, 575, 585, 595, 605.
Steel Application
  • Gear - Ju Feng offers the steel material that can be used for gears.

    There are many types of gears, such as: spur gears, sprocket gears, timing pulleys, helical gears, internal gears, racks, spur bevel gears, curved bevel gears, zero-degree bevel gears, staggered spiral gears, worm gears, Halberd gear. The material of the gear must have strong bending fatigue strength and contact fatigue strength, and the tooth surface must have sufficient hardness and wear resistance, and the core must have a certain strength and toughness.The materials for gear application that we recommend are as below.

  • Machine Tool Spindle - Ju Feng offers the steel material that can be used for machine tool spindle.
    Machine Tool Spindle

    There may be several spindles in a machine. There are many types of spindles, including grinding spindles, electric spindles, low-speed spindles, high-speed spindles, engraving machine spindles, milling machine spindles, lathe spindles, etc. Therefore, the spindle should be made of materials with the highest stability, rigidity and efficiency.The materials for machine tool spindle application that we recommend are as below.

  • Drive Shafts - Ju Feng offers the steel material that can be used for drive shaft.
    Drive Shafts

    In order to allow changes in the alignment and distance between the driving and driven components, the drive shaft contains one or more universal joints and couplings. Therefore, their materials must withstand strong pressure, while avoiding excessive additional weight to increase reverse inertia. The materials of drive shaft we recommend are as below.The materials for drive shaft application that we recommend are as below.

  • Bearing Shaft - Ju Feng offers the steel material that can be used for bearing shaft.
    Bearing Shaft

    There must be a shaft in the motor, which is mainly used to drive the motor and generate kinetic energy for other devices.The materials for bearing shaft application that we recommend are as below.

  • Cutting Tools - Ju Feng offers the steel material that can be used for cutting tools.
    Cutting Tools

    There are many types of cutting tools, such as: milling cutters, drills, circular saw blades, reamers, PCD (Polycrystalline Diamond) cutting tools, hole drills, lathe tools, stamping tools, etc. The quality of the cutting tool material will affect the surface quality, cutting efficiency, tool life and other factors. Therefore, the selected tool material should have a high degree of hardness, wear resistance, strength, toughness and heat resistance.The materials for cutting tools application that we recommend are as below.

  • Worm Shafts - Ju Feng offers the steel material that can be used for worm shaft.
    Worm Shafts

    When the worm wheel is running, it will generate a lot of heat energy due to contact friction. When the contact surface pressure is too high, coupled with high temperature, it is easy to cause wear on the tooth surface. Therefore, the worm rod should be made of wear-resistant and rigid materials.The materials for worm shaft application that we recommend are as below.

  • Machine Parts - Ju Feng offers the steel material that can be used for machining parts.
    Machine Parts

    The material types of mechanical parts include metallic materials, non-metallic materials and composite materials. Metal materials are divided into ferrous metal materials and non-ferrous metal materials. Ferrous metal materials include steel, cast steels and cast irons, which have good mechanical properties (such as strength, ductility, toughness, etc.), and are relatively cheap and easy to obtain. Non-ferrous metal materials have the advantages of low density, good thermal and electrical conductivity.The materials for machining parts application that we recommend are as below.