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China 舞钢Q/WTB X80(ST) X80(ST)、WPHY80、WFHY555管件用钢板技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: X80(ST) / X80(ST)
Category Grade Standard Region/Area Standard Content
Metals X80(ST) WYJ 503 China X80(ST)、WPHY80、WFHY555管件用钢板技术条件

Chemical composition(mass fraction)(wt.%) of the X80(ST)

Element Min Max Similar
Cu 0.1200 0.2000 -
Cr 0.1000 0.4500 -
Ni 0.3000 0.4000 -
Al 0.0200 0.0500 -
Mo 0.2000 0.4000 -
Ti 0.0100 0.0200 -
V 0.0450 0.0600 -
Nb 0.0500 0.0650 -
S - 0.0050 -
P - 0.0150 -
Mn 1.6000 1.6500 -
Si 0.2000 0.4000 -
C 0.0700 0.1000 -

Mechanical Properties of steel grade X80(ST)

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)
267 (≥) 146 (≥) 32 22 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical Properties of steel grade X80(ST)

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 - -     0.43 -  
645 355 - 33.3 242   -  
786 - 41 13.2   142 211

Heat Treatment of steel grade X80(ST)

Heat treated : 1626°C - 1323°C

Technological Curves of steel grade X80(ST)

Cross Reference Table (Equivalent Grade) of X80(ST)

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