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EU EN 4 紧固件机械性能 - 第2部分:规定保证载荷值的螺母 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4 / 4
Category Grade Standard Region/Area Standard Content
Metals 4 EN 20898-2 EU 紧固件机械性能 - 第2部分:规定保证载荷值的螺母

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

Element Min Max Similar
S - 0.1500 -
P - 0.0600 -
C - 0.5000 -

Mechanical Properties of steel grade 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)
966 (≥) 198 (≥) 34 34 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical Properties of steel grade 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
24 - -     0.14 -  
361 857 - 21.3 223   -  
622 - 13 31.2   134 223

Heat Treatment of steel grade 4

Heat treated : 1634°C - 1281°C

Technological Curves of steel grade 4

Cross Reference Table (Equivalent Grade) of 4

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