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China JB HT200 机床零件热处理技术条件 第5部分:渗氮、氮碳共渗 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: HT200 / HT200
Category Grade Standard Region/Area Standard Content
Metals HT200 JB/T 8491.5 China 机床零件热处理技术条件 第5部分:渗氮、氮碳共渗

Chemical composition(mass fraction)(wt.%) of the HT200

Element Min Max Similar

Mechanical Properties of steel grade HT200

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)
598 (≥) 694 (≥) 11 32 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 241

Physical Properties of steel grade HT200

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
41 - -     0.31 -  
547 422 - 24.3 313   -  
135 - 14 44.2   141 331

Heat Treatment of steel grade HT200

Heat treated : 1633°C - 1928°C

Technological Curves of steel grade HT200

Cross Reference Table (Equivalent Grade) of HT200

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