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M4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M4

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ASTM M4

Catalog

M4 Profile
M4 Chemical composition
M4 Mechanical Properties
M4 Physical Properties
M4 Heat treatment
M4 Size Availability
M4 Relevant products

Profile

This page is mainly introduced the M4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M4,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:M4
Type:Tool Die Steels
Country:USA
Standard:ASTM
Application:High-Speed Tool Steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
M41	ASTM	USA
M42	ASTM	USA
M43	ASTM	USA
M44	ASTM	USA
M46	ASTM	USA
M47	ASTM	USA
M48	ASTM	USA

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	1.25	1.40
Si	0.20	0.45
Mn	0.15	0.40
P		0.030
S		0.030
Cr	3.75	4.75
Mo	4.25	5.50
V	3.75	4.50
W	5.25	6.50
Co

Mechanical Properties

Tensile strength	108～358	σb/MPa
Yield Strength	952	σ 0.2 ≥/MPa
Elongation	47	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	759～034	-
HRC	30	-

Physical Properties

Thermal expansion	65-31	e-6/K
Thermal conductivity	90-60	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	8439-4737	째C
Density	9740-9206	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)
M4 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