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China JB 15 机床零件热处理技术条件 第1部分:退火、正火、调质 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 15 / 15
Category Grade Standard Region/Area Standard Content
Metals 15 JB/T 8491.1 China 机床零件热处理技术条件 第1部分:退火、正火、调质

Chemical composition(mass fraction)(wt.%) of the 15

Element Min Max Similar

Mechanical Properties of steel grade 15

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)
481 (≥) 431 (≥) 42 11 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade 15

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
14 - -     0.42 -  
257 729 - 32.3 243   -  
348 - 43 21.2   141 441

Heat Treatment of steel grade 15

Heat treated : 1334°C - 1362°C

Technological Curves of steel grade 15

Cross Reference Table (Equivalent Grade) of 15

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