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M40 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M40

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JIS M40

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This page is mainly introduced the M40 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of M40,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
M40
Hardness quartile HRA: 87
Bending strength frequency/MPa: 1569

Steel Garde:M40
Type:Special Alloy
Country:Japan
Standard:JIS
Application:Carbide for cutting tools

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
SM400A	CNS	China
SM400B	CNS	China
SM400C	CNS	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	413～495	σb/MPa
Yield Strength	190	σ 0.2 ≥/MPa
Elongation	35	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	722～750	-
HRC	30	-

Physical Properties

Thermal expansion	95-34	e-6/K
Thermal conductivity	98-76	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	9229-9328	째C
Density	7387-6058	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)
M40 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