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France AFNOR NF 56Si7 热处理条件下的冷轧窄钢带 - 交货技术条件 - 第4部分:弹簧钢和其它用途 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 56Si7 / 56 Si 7
Category Grade Standard Region/Area Standard Content
Metals 56 Si 7 NF EN 10132-4 France 热处理条件下的冷轧窄钢带 - 交货技术条件 - 第4部分:弹簧钢和其它用途

Chemical composition(mass fraction)(wt.%) of the 56 Si 7

Element Min Max Similar
Si 1.6000 2.0000 -
S - 0.0250 -
P - 0.0250 -
Mn 0.6000 0.9000 -
Cu+Sn - - -
C 0.5200 0.6000 -
Si 1.6000 2.0000 -
S - 0.0250 -
P - 0.0250 -
Ni - 0.4000 -
Mo - 0.1000 -
Mn 0.6000 0.9000 -
Cr - 0.4000 -
C 0.5200 0.6000 -

Mechanical Properties of steel grade 56 Si 7

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)
146 (≥) 369 (≥) 42 12 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 414

Physical Properties of steel grade 56 Si 7

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 - -     0.11 -  
313 521 - 14.3 121   -  
217 - 21 12.2   211 311

Heat Treatment of steel grade 56 Si 7

Heat treated : 1593°C - 1838°C

Technological Curves of steel grade 56 Si 7

Cross Reference Table (Equivalent Grade) of 56 Si 7

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