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EU EN 9 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: 9 / 9
Category Grade Standard Region/Area Standard Content
Metals 9 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 9

Element Min Max Similar
S - 0.1500 -
P - 0.0600 -
Mn 0.2500 - -
C - 0.5800 -

Mechanical Properties of steel grade 9

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)
477 (≥) 716 (≥) 34 31 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical Properties of steel grade 9

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 -  
293 953 - 13.3 444   -  
391 - 33 42.2   213 413

Heat Treatment of steel grade 9

Heat treated : 1357°C - 1225°C

Technological Curves of steel grade 9

Cross Reference Table (Equivalent Grade) of 9

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