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1.2740

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28NiCrMoV10 57NiCrMoV7-7
#1.2740

Description

Germany DIN 1.2740 Hot working alloy tool steel and 1.2740 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: 1.2740
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy 1.2740 DIN Germany Hot working alloy tool steel
1.2678
56NiCrMoV7
1.2714
26NiCrMoV5
1.2726
X50NiCrWV13-13
1.2731
28NiCrV5
1.2737
28NiCrMoV10

Chemical composition(mass fraction)(wt.%) of the 1.2740

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) V(%)
0.24-0.32 0.30-0.50 0.20-0.40 Max 0.030 Max 0.030 0.60-0.90 2.30-2.60 0.50-0.70 0.25-0.32

Mechanical Properties of steel grade 1.2740

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)
344 (≥) 715 (≥) 33 11 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical Properties of steel grade 1.2740

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
43 - -     0.23 -  
474 248 - 41.3 331   -  
853 - 31 43.2   114 413

Heat Treatment of steel grade 1.2740

Heat treated : 1245°C - 1132°C

Technological Curves of steel grade 1.2740

Cross Reference Table (Equivalent Grade) of 1.2740

Grade Standard Country Application
1.2740 DIN Germany Hot working alloy tool steel
28NiCrMoV10 57NiCrMoV7-7
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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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