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M4

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T11323 T11304
#M4

Description

USA ASTM M4 Molybdenum series High-speed tool steel and M4 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: M4
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy M4 ASTM USA Molybdenum series High-speed tool steel
T12015
M1
T11301
M2
T11302
M2 hight C
M3 Class1
T11313
M3 Class2
T11323

Chemical composition(mass fraction)(wt.%) of the M4

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％) V(%) W(%)
1.25～1.40 0.20～0.45 0.15～0.40 ≤0.030 ≤0.030 3.75～4.75 4.25～5.50 3.75～4.50 5.25～6.50

Mechanical Properties of steel grade M4

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)
493 (≥) 791 (≥) 42 41 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 211

Physical Properties of steel grade M4

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 - -     0.34 -  
119 374 - 44.3 124   -  
184 - 14 31.2   213 214

Heat Treatment of steel grade M4

Heat treated : 1123°C - 1127°C

Technological Curves of steel grade M4

Cross Reference Table (Equivalent Grade) of M4

Grade Standard Country Application
SM45 China Plastic mould with flat steel
SM50 China Plastic mould with flat steel
SM4Cr5MoSiV China Plastic mould with flat steel
SM4Cr5MoSiV1 China Plastic mould with flat steel
SM4Cr13 China Plastic mould with flat steel
SM45A China Plastic mould with Hot-rolled steel plate
SM48 China Plastic mould with Hot-rolled steel plate
M4 ASTM USA Molybdenum series High-speed tool steel
M41 ASTM USA Molybdenum series High-speed tool steel
M42 ASTM USA Molybdenum series High-speed tool steel
M43 ASTM USA Molybdenum series High-speed tool steel
M44 ASTM USA Molybdenum series High-speed tool steel
M46 ASTM USA Molybdenum series High-speed tool steel
M47 ASTM USA Molybdenum series High-speed tool steel
M48 ASTM USA Molybdenum series High-speed tool steel
CPM Rex M4 AISI USA Powder metallurgy high-speed tool steel
CPM Rex M4HS AISI USA Powder metallurgy high-speed tool steel
CPM Rex M42 AISI USA Powder metallurgy high-speed tool steel
M40 JIS Japan Carbide for cutting tools
BM4 UK Carbide for cutting tools
T11323 T11304
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