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M42 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M42

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ASTM M42

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This page is mainly introduced the M42 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M42,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
M42

Steel Garde:M42
Type:Special Alloy
Country:USA
Standard:ASTM
Application:Molybdenum series High-speed tool steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
CPM Rex M42	AISI	USA
BM42		UK
BM42		UK
SNCM420H	CNS	China
SCM420H	CNS	China
SUM42	CNS	China
SNCM420	CNS	China
SCM420	CNS	China
SCM421	CNS	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	125～202	σb/MPa
Yield Strength	071	σ 0.2 ≥/MPa
Elongation	10	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	797～849	-
HRC	30	-

Physical Properties

Thermal expansion	28-49	e-6/K
Thermal conductivity	58-52	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7437-9142	째C
Density	4731-2715	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)
M42 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