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4140

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4130 4340
#4140

Description

Australia AS 4140 Australia Structural steel and 4140 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 4140
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 4140 AS Australia Australia Structural steel
8617H
8620H
86B30H
8660H
8740H
9260H
926LH
X9315H
X4036
4130

Chemical composition(mass fraction)(wt.%) of the 4140

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％)
0.37-0.44 0.10-0.35 0.65-1.10 0.04 0.04 0.75-1.20 0.15-0.30

Mechanical Properties of steel grade 4140

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)
361 (≥) 832 (≥) 32 33 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade 4140

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
44 - -     0.31 -  
862 743 - 33.3 241   -  
392 - 23 11.2   221 233

Heat Treatment of steel grade 4140

Heat treated : 1195°C - 1262°C

Technological Curves of steel grade 4140

Cross Reference Table (Equivalent Grade) of 4140

Grade Standard Country Application
SAE NV7(4140) SAE USA precipitation hardening
UNS H41400 UNS USA precipitation hardening
ICI 4140 AISI USA
414140 CSN Czech Republic The Czech republic Structural steel
14140 CSN Czech Republic The Czech republic Structural steel
4140 AS Australia Australia Structural steel
4140H AS Australia Australia Structural steel
4140 AS Australia Australia Structural steel
4140 ICI USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
4140 ICI USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
4130 4340
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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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