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St45.8

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China 宝钢Q/BQB St45.8 锅炉用无缝钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: St45.8 / St45.8
Category Grade Standard Region/Area Standard Content
Metals St45.8 Q/BQB 201 China 锅炉用无缝钢管

Chemical composition(mass fraction)(wt.%) of the St45.8

Element Min Max Similar
Cu - 0.2500 -
Ni - 0.2500 -
Cr - 0.2500 -
P - 0.0350 -
S - 0.0350 -
Mn 0.4000 1.2000 -
Si 0.1000 0.3500 -
C - 0.2100 -
P - 0.0350 -
S - 0.0350 -
Mn 0.4000 1.2000 -
Si 0.1000 0.3500 -
C - 0.2100 -
Cu - 0.2000 -
Ni - 0.2500 -
Cr - 0.2500 -
P - 0.0250 -
S - 0.0200 -
Mn 0.4000 1.2000 -
Si 0.1000 0.3500 -
C - 0.2100 -

Mechanical Properties of steel grade St45.8

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)
511 (≥) 695 (≥) 33 42 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 342

Physical Properties of steel grade St45.8

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
31 - -     0.21 -  
359 787 - 12.3 231   -  
641 - 32 14.2   321 241

Heat Treatment of steel grade St45.8

Heat treated : 1337°C - 1873°C

Technological Curves of steel grade St45.8

Cross Reference Table (Equivalent Grade) of St45.8

Grade Standard Country Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1
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Jiangyou Longhai Special Steel Co.,Ltd.

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