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Description

Japan JIS G 4311 (2011), SUH 4 Specialsteel Heat-resisting steel bars and wire rods and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: SUH 4
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel SUH 4 Martensite JIS Japan Heat-resisting steel bars and wire rods

Chemical composition(mass fraction)(wt.%) of the SUH 4

C Si Mn P S Cr Ni Mo
0.75 -0.85 1.75 -2.25 0.20 -0.60 ≤0.03 ≤0.03 19.00 -20.50 1.15 -1.65 ≤ ≥

Mechanical Properties of steel grade SUH 4

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)
421 (≥) 434 (≥) 32 44 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 134

Physical Properties of steel grade SUH 4

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
21 - -     0.31 -  
634 173 - 41.3 142   -  
677 - 42 13.2   222 223

Heat Treatment of steel grade SUH 4

Heat treated : 1885°C - 1368°C

Technological Curves of steel grade SUH 4

Relevant standard of SUH 4

G 4311 (2011) Heat-resisting steel bars and wire rods G-4311-(2011).pdf

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