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4140

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4130 4330
#4140

Description

USA ICI 4140 Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures and 4140 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 4140
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy 4140 ICI USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
13Q
14Q
15A
1020
1030
1040
1050
6120
4020
4130

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

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％)
0.35-0.45 0.20-0.80 0.70-1.00 0.04 0.045 0.80-1.10 0.15-0.25

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)
538 (≥) 456 (≥) 23 11 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

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
21 - -     0.44 -  
516 888 - 34.3 133   -  
549 - 14 14.2   213 413

Heat Treatment of steel grade 4140

Heat treated : 1429°C - 1154°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 4330
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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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