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709M40

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R30016 En19
#709M40 #1-7227 #4140 #440 #42CrMo4 #En19 #40CrMoV4-6

Description

UK B.S. BS 970-1 (1996), 709M40 Specialsteel Specification for wrought steels for mechanical and allied engineering purposes. General inspection and testing procedures and specific requirements for carbon, carbon manganese, alloy and stainless steels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 709M40
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 709M40 B.S. UK Specification for wrought steels for mechanical and allied engineering purposes. General inspection and testing procedures and specific requirements for carbon, carbon manganese, alloy and stainless steels

Chemical composition(mass fraction)(wt.%) of the 709M40

Si S P Mo Mn Cr C
0.1000 -0.4000 ≤0.0400 ≤0.0350 0.2500 -0.3500 0.7000 -1.0000 0.9000 -1.2000 0.3600 -0.4400

Mechanical Properties of steel grade 709M40

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)
681 (≥) 519 (≥) 24 42 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 123

Physical Properties of steel grade 709M40

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 - -     0.32 -  
618 977 - 14.3 334   -  
218 - 23 42.2   341 144

Heat Treatment of steel grade 709M40

Heat treated : 1759°C - 1392°C

Technological Curves of steel grade 709M40

Cross Reference Table (Equivalent Grade) of 709M40

Grade Standard Country Application
S41400
NV7 (4140)
H41400
S41400
AISI 4140
SAE 4140
UNS G41400
AISI TS4140
ASTM 4140
UNS G41400
ASTM 4140
ASTM 4140H
UNS H41400
4140
SAE 4140H
UNS H41400
SAE 4140RH
ICI 4140
SAE NV7(4140)
SAE NV7(4140)

Relevant standard of 709M40

BS 970-1 (1996) Specification for wrought steels for mechanical and allied engineering purposes. General inspection and testing procedures and specific requirements for carbon, carbon manganese, alloy and stainless steels BS-970-1---(1996).pdf
R30016 En19
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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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