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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

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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.
M4

Steel Garde:M4
Type:Special Alloy
Country:USA
Standard:ASTM
Application:Molybdenum series High-speed tool steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
SM45		China
SM50		China
SM4Cr5MoSiV		China
SM4Cr5MoSiV1		China
SM4Cr13		China
SM45A		China
SM48		China
M41	ASTM	USA
M42	ASTM	USA
M43	ASTM	USA
M44	ASTM	USA
M46	ASTM	USA
M47	ASTM	USA
M48	ASTM	USA
CPM Rex M4	AISI	USA
CPM Rex M4HS	AISI	USA
CPM Rex M42	AISI	USA
M40	JIS	Japan
BM4		UK
BM4		UK
BM42		UK
BM42		UK
Custom450(XM-25)	UNS	USA
Custom450(XM-25)	UNS	USA
Custom455(XM-16)	UNS	USA
Custom455(XM-16)	UNS	USA
03X21H21M4Γ	ГОСТ	Russia
SNCM420H	CNS	China
SCM415H	CNS	China
SCM418H	CNS	China
SCM420H	CNS	China
SCM435H	CNS	China
SCM440H	CNS	China
SCM445H	CNS	China
SUM41	CNS	China
SUM42	CNS	China
SUM43	CNS	China
SM400A	CNS	China
SM400B	CNS	China
SM400C	CNS	China
SM490A	CNS	China
SM490B	CNS	China
SM490C	CNS	China
SM490YA	CNS	China
SM490YB	CNS	China
SNCM415	CNS	China
SNCM420	CNS	China
SNCM431	CNS	China
SNCM439	CNS	China
SNCM447	CNS	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	878～482	σb/MPa
Yield Strength	358	σ 0.2 ≥/MPa
Elongation	37	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	795～217	-
HRC	30	-

Physical Properties

Thermal expansion	55-53	e-6/K
Thermal conductivity	79-98	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	9465-8015	째C
Density	1290-5438	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 Special Alloy	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