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Italy UNI 5 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: 5 / 5
Category Grade Standard Region/Area Standard Content
Metals 5 UNI EN 20898-2 Italy 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 5

Element Min Max Similar

Mechanical Properties of steel grade 5

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)
371 (≥) 925 (≥) 12 21 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 242

Physical Properties of steel grade 5

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
23 - -     0.13 -  
737 552 - 41.3 241   -  
172 - 14 33.2   131 321

Heat Treatment of steel grade 5

Heat treated : 1419°C - 1918°C

Technological Curves of steel grade 5

Cross Reference Table (Equivalent Grade) of 5

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