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England B.S. BM34 Specification for tool and die steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: BM34 / BM 34
Category Grade Standard Region/Area Standard Content
Metals BM 34 BS 4659 England Specification for tool and die steels

Chemical composition(mass fraction)(wt.%) of the BM 34

Element Min Max Similar

Mechanical Properties of steel grade BM 34

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)
199 (≥) 711 (≥) 24 14 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical Properties of steel grade BM 34

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
42 - -     0.13 -  
774 168 - 22.3 442   -  
672 - 12 23.2   233 224

Heat Treatment of steel grade BM 34

Heat treated : 1871°C - 1385°C

Technological Curves of steel grade BM 34

Cross Reference Table (Equivalent Grade) of BM 34

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