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M8 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M8

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SAE M8

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M8 Profile
M8 Chemical composition
M8 Mechanical Properties
M8 Physical Properties
M8 Heat treatment
M8 Size Availability
M8 Relevant products

Profile

This page is mainly introduced the M8 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M8,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:M8
Type:Tool Die Steels
Country:USA
Standard:SAE
Application:High-Speed Tool Steel

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.80	0.85
Si	0.20	0.40
Mn	0.10	0.40
Cr	4.00	4.50
Mo	4.30	4.70
V	1.35	1.65
W	5.25	5.75
Nb		1.25

Mechanical Properties

Tensile strength	877～516	σb/MPa
Yield Strength	344	σ 0.2 ≥/MPa
Elongation	59	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	678～490	-
HRC	30	-

Physical Properties

Thermal expansion	25-48	e-6/K
Thermal conductivity	90-35	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	1630-5796	째C
Density	7810-8729	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)
M8 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