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BH21

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BH21 BH21A
#BH21

Description

UK BH21 Carbide for cutting tools and BH21 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: BH21
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy BH21 UK Carbide for cutting tools
BH11
BH11
BH11
BH12
BH12
BH13
BH13
BH19
BH19
BH21

Chemical composition(mass fraction)(wt.%) of the BH21

C(％) Si(％) Mn(％) Cr(％) Ni(％) Mo(％) V(%) W(%) Other(%)
0.25-0.35 ≤0.40 ≤0.40 2.25-2.35 ≤0.40 ≤0.60 ≤0.40 8.50-10.0 Cu≤0.20,Sn≤0.05

Mechanical Properties of steel grade BH21

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)
375 (≥) 332 (≥) 31 31 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 324

Physical Properties of steel grade BH21

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
14 - -     0.44 -  
127 559 - 11.3 431   -  
958 - 21 41.2   311 212

Heat Treatment of steel grade BH21

Heat treated : 1284°C - 1624°C

Technological Curves of steel grade BH21

Cross Reference Table (Equivalent Grade) of BH21

Grade Standard Country Application
BH21 UK Carbide for cutting tools
BH21 UK Carbide for cutting tools
BH21A UK Carbide for cutting tools
BH21A UK Carbide for cutting tools
BH21 BH21A
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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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