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M7

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T11306 T11307
#M7

Description

USA ASTM M7 M7 and M7 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: M7
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy M7 ASTM USA M7
T11302
M2 hight C
M3 Class1
T11313
M3 Class2
T11323
M4
T11304
M6
T11306

Chemical composition(mass fraction)(wt.%) of the M7

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％) V(%) W(%)
0.97～1.05 0.20～0.55 0.15～0.40 ≤0.030 ≤0.030 3.50～4.00 8.20～9.20 1.75～2.25 1.40～2.10

Mechanical Properties of steel grade M7

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)
728 (≥) 848 (≥) 44 34 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 242

Physical Properties of steel grade M7

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
23 - -     0.21 -  
262 455 - 21.3 133   -  
447 - 31 31.2   141 424

Heat Treatment of steel grade M7

Heat treated : 1683°C - 1455°C

Technological Curves of steel grade M7

Cross Reference Table (Equivalent Grade) of M7

Grade Standard Country Application
M7 ASTM USA M7
M78 AFNOR France Carbide for cutting tools
M78 AFNOR France Carbide for cutting tools
M78 AFNOR France Carbide for cutting tools
M78 AFNOR France Carbide for cutting tools
M78 AFNOR France Carbide for cutting tools
M78 AFNOR France Carbide for cutting tools
SUSXM7 JIS Japan austenitic stainless steel
STSXM7 KS Korea Austenitic Steel
STSXM7 KS Korea Austenitic Steel
CNS XM7 CNS China CNS standard stainless steel austenite size
CNS XM7 CNS China China Taiwan Stainless steel
T11306 T11307
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