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40B

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37SiMn2MoV 45B
#40B

Description

China GBT 40B China structural steel and alloy steel and 40B Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 40B
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 40B GBT China China structural steel and alloy steel
40Mn2
45Mn2
50Mn2
20MnV
27SiMn
35SiMn
42SiMn
20SiMn2MoV
25SiMn2MoV
37SiMn2MoV

Chemical composition(mass fraction)(wt.%) of the 40B

C(％) Si(％) Mn(％) B(%)
0.37-0.44 0.17-0.37 0.60-0.90 0.0005-0.0035

Mechanical Properties of steel grade 40B

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)
693 (≥) 117 (≥) 34 34 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical Properties of steel grade 40B

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
32 - -     0.34 -  
597 379 - 32.3 214   -  
311 - 21 42.2   432 323

Heat Treatment of steel grade 40B

Heat treated : 1535°C - 1324°C

Technological Curves of steel grade 40B

Cross Reference Table (Equivalent Grade) of 40B

Grade Standard Country Application
AISI 440B AISI USA Martensitic special steel
ASTM 440B ASTM USA Martensitic special steel
SUS440B JIS Japan Martensitic special steel
STS440B KS Korea martensitic steel
STS440B KS Korea martensitic steel
CNS 440B CNS China CNS standard martensite stainless steel
40BOL0 STAS/SR Romania Alloy structural steel
40BCr10S STAS/SR Romania Alloy structural steel
40BCr10X STAS/SR Romania Alloy structural steel
40BCr10XS STAS/SR Romania Alloy structural steel
40BCr10q STAS/SR Romania Alloy structural steel
40BCr10CS STAS/SR Romania Alloy structural steel
40BCr10q STAS/SR Romania Alloy structural steel
40BCr10AT STAS/SR Romania Alloy structural steel
40B GBT China China structural steel and alloy steel
CNS 440B CNS China China Taiwan Stainless steel
37SiMn2MoV 45B
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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