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4340 H

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X4317H 4620 H
#4340 #H

Description

Australia AS 4340 H Australia Structural steel and 4340 H Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 4340 H
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 4340 H AS Australia Australia Structural steel
9261
X9315
X9931
X9940
X1320H
X3312H
4130H
4140H
4150H
X4317H

Chemical composition(mass fraction)(wt.%) of the 4340 H

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％)
0.37-0.44 0.10-0.35 0.55-0.90 0.04 0.04 0.65-0.95 1.55-2.00 0.20-0.30

Mechanical Properties of steel grade 4340 H

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)
785 (≥) 684 (≥) 41 31 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 221

Physical Properties of steel grade 4340 H

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
34 - -     0.44 -  
968 686 - 34.3 224   -  
438 - 33 12.2   323 232

Heat Treatment of steel grade 4340 H

Heat treated : 1858°C - 1786°C

Technological Curves of steel grade 4340 H

Cross Reference Table (Equivalent Grade) of 4340 H

Grade Standard Country Application
ICI 4340 AISI USA
414340 CSN Czech Republic The Czech republic Structural steel
14340 CSN Czech Republic The Czech republic Structural steel
4340 AS Australia Australia Structural steel
4340 H AS Australia Australia Structural steel
4340 AS Australia Australia Structural steel
4340 ICI USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
4340 ICI USA Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
H11 ASTM USA Alloy tool steel
H12 ASTM USA Alloy tool steel
H14 ASTM USA Alloy tool steel
H19 ASTM USA Alloy tool steel
H21 ASTM USA Alloy tool steel
H22 ASTM USA Alloy tool steel
H24 ASTM USA Alloy tool steel
H25 ASTM USA Alloy tool steel
H26 ASTM USA Alloy tool steel
H41 ASTM USA Alloy tool steel
H42 ASTM USA Alloy tool steel
H43 ASTM USA Alloy tool steel
X4317H 4620 H
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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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