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SF-568 Class 4.8

America ASME SF-568Class4.8 碳及合金钢米制外螺纹紧固件的技术规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SF-568Class4.8 / SF-568 Class 4.8
Category Grade Standard Region/Area Standard Content
Metals SF-568 Class 4.8 ASME SF-568M America 碳及合金钢米制外螺纹紧固件的技术规范

Chemical composition(mass fraction)(wt.%) of the SF-568 Class 4.8

Element Min Max Similar
S - 0.0580 -
P - 0.0480 -
C - 0.5500 -

Mechanical Properties of steel grade SF-568 Class 4.8

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)
566 (≥) 487 (≥) 42 12 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade SF-568 Class 4.8

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
11 - -     0.32 -  
433 825 - 33.3 243   -  
635 - 42 14.2   224 444

Heat Treatment of steel grade SF-568 Class 4.8

Heat treated : 1719°C - 1228°C

Technological Curves of steel grade SF-568 Class 4.8

Cross Reference Table (Equivalent Grade) of SF-568 Class 4.8

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