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Description

JIS STPA20 Alloy Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Alloy Steel: STPA20
Category Type Steel Grade Standard Country Application
Steel GradesAlloy Steel STPA20 JIS
DIN 1.7220
DIN 1.7223
DIN 1.7225
DIN 1.7228
DIN 1.7511
DIN 1.8159
DIN 1.0204
11562
11564
13CrMo4-4

Chemical composition(mass fraction)(wt.%) of the STPA20

C Si Mn Ni S P Cr Mo W V Ti Cu
0.09 - 0.16 0.17 - 0.37 0.4 - 0.7 max 0.3 max 0.025 max 0.03 0.4 - 0.7 0.4 - 0.6 max 0.2 max 0.05 max 0.03 max 0.2

Mechanical Properties of steel grade STPA20

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)
398 (≥) 296 (≥) 12 13 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade STPA20

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
43 - -     0.33 -  
996 695 - 44.3 421   -  
277 - 22 42.2   322 144

Heat Treatment of steel grade STPA20

Heat treated : 1278°C - 1891°C

Technological Curves of steel grade STPA20


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