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Description

Korea KS STS630 precipitation hardened steel and STS630 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: STS630
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy STS630 KS Korea precipitation hardened steel
STS416
STS420J1
STS420J2
STS420F
STS420F2
STS431
STS440A
STS440B
STS440C
STS440F

Chemical composition(mass fraction)(wt.%) of the STS630

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Cu(%) Nb(%)
Max 0.07 Max 1.00 Max 1.00 Max 0.04 Max 0.03 15.O-17.0 3.00-5.00 3.00-5.00 0.15-0.45

Mechanical Properties of steel grade STS630

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
476 (≥) 726 (≥) 32 14 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 142

Physical Properties of steel grade STS630

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
23 - -     0.32 -  
735 547 - 32.3 433   -  
347 - 13 32.2   341 223

Heat Treatment of steel grade STS630

Heat treated : 1449°C - 1526°C

Technological Curves of steel grade STS630

Cross Reference Table (Equivalent Grade) of STS630

Grade Standard Country Application
STS630 KS Korea precipitation hardened steel
STS630 KS Korea precipitation hardened steel

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