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Description

Russia GOST H70MΦ Specialsteel Russia GOCT standard deformation of high temperature alloy grades and chemical composition and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: H70MΦ
Category Class Grade Standard Country Application
Steel GradesSpecialsteel H70MΦ GOST Russia Russia GOCT standard deformation of high temperature alloy grades and chemical composition

Chemical composition(mass fraction)(wt.%) of the H70MΦ

C Si Mn P S Cr Ni Mo Al Ti Fe V
≤0.05 ≤0.20 ≤0.50 ≤0.020 ≤0.020 ≤0.30 ≤remaining 25.00 -29.00 ≤ ≥ ≤0.15 ≤0.80 1.40 -1.70

Mechanical Properties of steel grade H70MΦ

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)
997 (≥) 686 (≥) 44 41 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 243

Physical Properties of steel grade H70MΦ

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
32 - -     0.43 -  
975 283 - 21.3 121   -  
471 - 33 34.2   423 222

Heat Treatment of steel grade H70MΦ

Heat treated : 1979°C - 1485°C

Technological Curves of steel grade H70MΦ

Cross Reference Table (Equivalent Grade) of H70MΦ

Grade Standard Country Application
H70MΦB
H70MΦ

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