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M7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M7

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ASTM M7

Catalog

M7 Profile
M7 Chemical composition
M7 Mechanical Properties
M7 Physical Properties
M7 Heat treatment
M7 Size Availability
M7 Relevant products

Profile

This page is mainly introduced the M7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M7,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
High-Speed Tool Steel

Steel Garde:M7
Type:Tool Die Steels
Country:USA
Standard:ASTM
Application:High-Speed Tool Steel

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.97	1.05
Si	0.20	0.55
Mn	0.15	0.40
P		0.030
S		0.030
Cr	3.50	4.00
Mo	8.20	9.20
V	1.75	2.25
W	1.40	2.10
Co

Mechanical Properties

Tensile strength	121～512	σb/MPa
Yield Strength	730	σ 0.2 ≥/MPa
Elongation	73	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	290～331	-
HRC	30	-

Physical Properties

Thermal expansion	16-27	e-6/K
Thermal conductivity	02-94	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	4791-3301	째C
Density	3766-3364	kg/m³
Resistivity	0.50-0.60	Ohm.mm²/m

Heat Treatment Regime

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Size Availability

Steel Grade	Specification	Processing range(mm)
M7 Tool Die Steels	Round Bar and Hollow Bar	Φ1 to Φ2000
	Square and Flat Steel	Φ10 to Φ100
	Plate and Sheet	0.08-800(Thickness)10-1500(Width)Length
	Tube or Pipe	OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
	Coil and Strip Steel	THK:0.1mm Width:1500mm
	Forged	Ring/Cylindrical/Disk