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SUS440A chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS440A

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JIS SUS440A

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This page is mainly introduced the SUS440A chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS440A,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
SUS440A

Steel Garde:SUS440A
Type:Special Alloy
Country:Japan
Standard:JIS
Application:Martensitic special steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	431～718	σb/MPa
Yield Strength	642	σ 0.2 ≥/MPa
Elongation	14	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	210～837	-
HRC	30	-

Physical Properties

Thermal expansion	25-69	e-6/K
Thermal conductivity	16-43	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	0265-5069	째C
Density	7276-1714	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)
SUS440A 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