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M50 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M50

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ASTM M50

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This page is mainly introduced the M50 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M50,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Bearing Steel

Steel Garde:M50
Type:Tool Die Steels
Country:USA
Standard:ASTM
Application:Bearing Steel

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.78	0.88
Si	0.20	0.60
Mn	0.15	0.45
P		0.030
S		0.030
Cr	3.75	4.50
Mo	3.90	4.75
V	0.80	1.25
W
Co

Mechanical Properties

Tensile strength	476～350	σb/MPa
Yield Strength	372	σ 0.2 ≥/MPa
Elongation	22	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	432～124	-
HRC	30	-

Physical Properties

Thermal expansion	09-33	e-6/K
Thermal conductivity	65-62	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7912-9447	째C
Density	1723-3958	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)
M50 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