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BM4

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BM4 BM15
#BM4

Description

UK BM4 Carbide for cutting tools and BM4 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: BM4
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy BM4 UK Carbide for cutting tools
BT20①
BT20①
BT20①
BT20①
BT21
BT21
BT42
BM2
BM2
BM4

Chemical composition(mass fraction)(wt.%) of the BM4

C(％) Si(％) Mn(％) Cr(％) Ni(％) Mo(％) V(%) W(%) Co(%) Other(%)
1.25-1.40 ≤0.40 ≤0.40 ≤1.00 ≤0.40 4.25-5.00 3.75-4.25 5.75-6.50 ≤1.00 Cu≤0.20,Sn≤0.05

Mechanical Properties of steel grade BM4

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)
366 (≥) 242 (≥) 31 41 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

Physical Properties of steel grade BM4

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 - -     0.41 -  
893 421 - 12.3 341   -  
687 - 31 43.2   122 213

Heat Treatment of steel grade BM4

Heat treated : 1976°C - 1575°C

Technological Curves of steel grade BM4

Cross Reference Table (Equivalent Grade) of BM4

Grade Standard Country Application
BM4 UK Carbide for cutting tools
BM4 UK Carbide for cutting tools
BM42 UK Carbide for cutting tools
BM42 UK Carbide for cutting tools
BM4 BM15
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Jiangyou Longhai Special Steel Co.,Ltd.
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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