Structural Steel with Specified Hardenability Bands

Solid core and shell are ideal attributes for hardened assembly parts because they provide the material with surface wear-resistance, fatigue strength and impact-resistance from the core which are acquired by implementing carburization on surface, hardening and annealing. to get more wear and fatigue resistance in the meantime keeping its toughness and workability. This type of steel features sufficient hardenability and mechanical performance after hardening.

The so-called "H" steel, that is, to ensure heat treatment steel, heat treatment, hardness distribution is guaranteed in the tempering curve "H" belt, within the lower limit.

Product Applications

Production Application includes: various gears, camshaft, universal joint, small driving gear, connection rod, car shaft and spindle,…etc.

SCM440H

SCM440H (SCM440H, 4140H, 1.7225H) Suitable for the manufact

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SCM440H

SCM440H (SCM440H, 4140H, 1.7225H)
Suitable for the manufacture of gears, axles, pistons, automobiles, locomotive parts and a variety of mechanical parts of the surface carbon permeation hardening.

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SCM415H

(SCM415H, 1.7262H) This steel is a surface carbon-permeable

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SCM415H

(SCM415H, 1.7262H)
This steel is a surface carbon-permeable hardened steel.
Suitable for the manufacture of gears, axles, pistons, automobiles, locomotive parts and a variety of mechanical parts of the surface carbon permeation hardening.

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SNCM220H

(SNCM220H, 8620H, 1.6523H) The steel is surface carburized

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SNCM220H

(SNCM220H, 8620H, 1.6523H)
The steel is surface carburized and hardened. After heat treatment, it is strong and tough inside and hard surface.
Suitable for the manufacture of gears, axles, pistons, automobiles, locomotive parts and a variety of mechanical parts of the surface carbon permeation hardening.

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Steel data

Standard Code Spec No. Material No. Mark
CNS 11999 SMn420H
JIS G4052 SMn420H
AISI 1522H
DIN 17200 1.1133 20Mn5
CNS 11999 SMnC420H
JIS G4052 SMnC420H
CNS 11999 SCr415H
JIS G4052 SCr415H
DIN 17210 1.7015 15Cr3
CNS 11999 SCr420H
JIS G4052 SCr420H
ASTM A304 5120H
AISI 5120H
ASTM A304 5130H
CNS 11999 SCr440H
JIS 5042 SCr440H
AISI 5140H
DIN 17200 1.7034 37Cr4
CNS 11999 SCM415H
JIS G4052 SCM415H
DIN 17200 15CrMo5
CNS 11999 SCM420H
JIS G4052 SCM420H
DIN 17200 1.7264 20CrMo5
CNS 11999 SCM435H
GB 3077 35CrMo
JIS G4052 SCM440H
AISI 4140H
DIN 17200 1.7225 42CrMo4
CNS 11999 SCM822H
(C)% (Si)% (Mn)% (P)% (S)% (Ni)% (Cr)% (Mo)% (Cu)% Yield strength(Mpa) Tensile strength(Mpa) Elongation(%) Hardness(HB)
0.16~0.23 0.15~0.35 1.15~1.55 ≦ 0.03 ≦ 0.03 ≦ 0.25 ≦ 0.35 ≦ 0.3
0.16~0.23 0.15~0.3 1.15~1.55 ≦ 0.03 ≦ 0.03 ≦ 0.25 ≦ 0.35 ≦ 0.3
0.17~0.25 0.11~0.3 1~1.5 ≦ 0.04 ≦ 0.05
0.17~0.23 0.3~0.6 1~1.3 ≦ 0.035 ≦ 0.035
0.16~0.23 0.15~0.35 1.15~1.55 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.35~0.7 ≦ 0.3
0.16~0.23 0.15~0.35 1.15~1.55 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.35~0.7 ≦ 0.3
0.12~0.18 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 ≦ 0.3
0.12~0.18 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 ≦ 0.3
0.12~0.18 0.15~0.4 0.4~0.6 ≦ 0.035 ≦ 0.035 0.4~0.7
0.17~0.23 0.15~0.35 0.6~1 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.2 ≦ 0.3
0.17~0.23 0.15~0.35 0.6~1 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.2 ≦ 0.3
0.17~0.23 0.15~0.35 0.6~1 ≦ 0.035 ≦ 0.04 0.6~1
0.17~0.23 0.15~0.35 0.6~1 ≦ 0.035 ≦ 0.04 0.6~1
0.27~0.33 0.15~0.35 0.6~1.1 ≦ 0.035 ≦ 0.04 0.75~1.2
0.37~0.44 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 ≦ 0.3
0.37~0.44 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 ≦ 0.3
0.37~0.44 0.15~0.35 0.6~1 ≦ 0.035 ≦ 0.04 0.6~1
0.34~0.41 0.15~0.4 0.6~0.9 ≦ 0.035 ≦ 0.035 0.8~1.25
0.12~0.18 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.35 ≦ 0.3
0.12~0.18 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.35 ≦ 0.3
0.13~0.17 0.15~0.35 0.5~1.1 ≦ 0.04 ≦ 0.035 0.85~1.15 0.2~0.3
0.17~0.23 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.35 ≦ 0.3
0.17~0.23 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.35 ≦ 0.3
0.18~0.22 0.15~0.35 0.9~1.2 ≦ 0.035 ≦ 0.035 1.1~1.4 0.2~0.3
0.32~0.39 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.35 ≦ 0.3
0.32~0.4 0.17~0.37 0.4~0.7 ≦ 0.035 ≦ 0.035 0.8~1.1 0.15~0.25 ≧ 835 ≧ 980 ≧ 12 ≦ 229
0.37~0.44 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.15~0.35 ≦ 0.3
0.37~0.44 0.15~0.3 0.65~1.1 ≦ 0.035 ≦ 0.04 0.75~1.2 0.15~0.25
0.38~0.45 0.15~0.4 0.5~0.8 ≦ 0.035 ≦ 0.035 0.9~1.2 0.15~0.3
0.19~0.25 0.15~0.35 0.55~0.9 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.85~1.25 0.35~0.45 ≦ 0.3