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SUS440B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS440B

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JIS SUS440B

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This page is mainly introduced the SUS440B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS440B,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
SUS440B

Steel Garde:SUS440B
Type:Special Alloy
Country:Japan
Standard:JIS
Application:Martensitic special steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	143～226	σb/MPa
Yield Strength	711	σ 0.2 ≥/MPa
Elongation	85	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	278～657	-
HRC	30	-

Physical Properties

Thermal expansion	85-67	e-6/K
Thermal conductivity	53-77	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	3870-6921	째C
Density	0181-4575	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)
SUS440B 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