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35 45
#40

Description

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

Datasheet for: Steel Grades:Structure Steel: 40
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 40 GBT China China structural steel and alloy steel
08F
10F
15F
8
GBT10
15
20
25
30
35

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

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Cu(%)
0.37-0.44 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.3 0.25

Mechanical Properties of steel grade 40

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)
456 (≥) 363 (≥) 11 32 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 214

Physical Properties of steel grade 40

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
22 - -     0.22 -  
589 661 - 23.3 423   -  
767 - 13 41.2   413 131

Heat Treatment of steel grade 40

Heat treated : 1561°C - 1943°C

Technological Curves of steel grade 40

Cross Reference Table (Equivalent Grade) of 40

Grade Standard Country Application
T30403 UNS USA Alloy tool steel
T30404 ASTM USA Alloy tool steel
T30405 UNS USA Alloy tool steel
T30407 UNS USA Alloy tool steel
SS440 JIS Japan SS440
CPM 440V AISI USA Powder metallurgy tool steelCold work tool steel
HAP 40 AISI USA Powder metallurgy high-speed tool steel
Stellite 1040 USA Stellite alloy
Stellite T40 USA Stellite alloy
1.1740 DIN Germany Carbon tool steel
140Cr3 DIN Germany Cold working alloy tool steel
140Cr2 DIN Germany Cold working alloy tool steel
140CrV1 DIN Germany Cold working alloy tool steel
40CrMnMo7 DIN Germany Cold working alloy tool steel
40CrMnMoS8-6 DIN Germany Cold working alloy tool steel
40CrMnNiMo8-6-4 DIN Germany Cold working alloy tool steel
40CrMoV7 DIN Germany Hot working alloy tool steel
X40CrMoV5-1 DIN Germany Hot working alloy tool steel
1.2740 DIN Germany Hot working alloy tool steel
1.3340 DIN Germany High-speed tool steel
35 45
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