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Description

Russia GOST H70MΦB 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: H70MΦB
Category Class Grade Standard Country Application
Steel GradesSpecialsteel H70MΦB GOST Russia Russia GOCT standard deformation of high temperature alloy grades and chemical composition

Chemical composition(mass fraction)(wt.%) of the H70MΦB

C Si Mn P S Cr Ni Mo Al Ti Fe V W
≤0.02 ≤0.10 ≤0.50 ≤ ≥ ≤ ≥ ≤0.30 ≤remaining 25.00 -27.00 ≤ ≥ ≤0.15 ≤0.80 1.40 -1.70 0.10 -0.45

Mechanical Properties of steel grade H70MΦB

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)
868 (≥) 987 (≥) 31 22 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 243

Physical Properties of steel grade H70MΦB

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
31 - -     0.32 -  
229 638 - 41.3 322   -  
511 - 42 13.2   423 143

Heat Treatment of steel grade H70MΦB

Heat treated : 1448°C - 1414°C

Technological Curves of steel grade H70MΦB

Cross Reference Table (Equivalent Grade) of H70MΦB

Grade Standard Country Application
H70MΦB

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