SCM420 Grade Introduction:

SCM420 are alloy steel with high hardenability, temper brittleness, well weldability, less cold cracking tendency, good machinability, and great cold plastic strain. SCM420 generally is used for the parts which need high wear resistance, such as gears, shafts, high-pressure pipes, all kinds of fasteners, and so on. Carburizing structural steel.

 

SCM420 Grade Application:

SCM420 case hardening alloy steels are widely used as gear components of all kinds and cogwheels. Open die steel forgings for general engineering purposes. Steel is available to supply different sizes of SCM420 steel and is able to supply modified SCM420 steel composition according to different requirements.

 

SCM420 Equivalent grades:

GB 20CrMo, JIS SCM420, ASTM 4118, DIN 25CrMo4.

 

Addition to other grades:

MS, EN1A, EN3B, EN8, EN8D, EN9, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS M2, M35, M42, DIN-1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTM SA-105 , SAE1018, SAE1010, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.

 

Our Supply Range:

 

Price List:

 

 

SCM420 Chemical composition:

The following table shows the chemical composition of SCM 420 steel:

Element	C	Mn	P	S	Cr	Mo	Ni	Cu	Si
Content (%)	0.18-0.23	0.60-0.85	0.15-0.35	0 ≦ 0.03	0 ≦ 0.03	0.90-1.20	0.15-0.30	0 ≦ 0.025	0 ≦ 0.03

 

SCM420 Mechanical Properties:

Tensile strength σb (MPa): ≥ 885 (90)
Yield strength σs (MPa): ≥ 685 (70)
Elongation rate δ5 (%): ≥12
Section shrinkage ψ (%): ≥50
Impact energy Akv (J): ≥78
Impact toughness value αkv (J / cm²): ≥98 (10)
Hardness: ≤ 197HB

 

SCM420 Hardness:

352-362

 

SCM420 Heat treatment:

After the final heat treatment, there is a suitable drawing pass.

 

SCM420 Hardening:

850~900℃ 1st Oil Cooling, 800~850℃ 2nd Oil Cooling.

 

SCM420 Tempering:

150~200℃ Air Cooling.

 

SCM420  Physical Properties:

• Modulus of elasticity [103 x N/mm2]: 210

• Density [g/cm3]: 7.85

• Thermal conductivity [W/m.K]: 20.0

 

SCM420 Thermal Properties:

Thermal conductivity [W/m.K]: 20.0

 

SCM420 Forging Properties:

Hot forming temperature: 1100-850℃

 

SCM420 Stress Relieving:

After the final cold drawing, there is a stress relief heat treatment in a controlled atmosphere.

 

SCM420 Normalizing:

850~900℃ Air Cooling

 

SCM420 Annealing:

850℃ Furnace Cooling

 

SCM420 Density:

Density [g/cm3]: 7.85

 

SCM420 Machine ability:

Machinability (hot rolled and cold drawn, based on 100 machinability for AISI 1212 steel)

 

SCM420 Welding:

The weldability of AISI 4118 steel is also very good, with excellent machining or cutting properties.

 

Supply Cities:

Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Ranipet, Sivakasi, Karur, Hosur, Nagercoil, Kanchipuram, Karaikudi, Neyveli, Cuddalore, Kumbakonam, Thiruvannamalai, Pollachi, Rajapalayam, Gudiyatham, Pudukottai, Vaniyambadi, Ambur, Nagapattinam, Trivandrum, Vijayawada, Guntur, Thirupathi, Nazarathpet, Kakinada, Kurnool, Kadapa, Nizamabad, Mahabubnagar, Karimnagar.

 

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