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STS440B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS440B

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KS STS440B

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This page is mainly introduced the STS440B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS440B,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
STS440B

Steel Garde:STS440B
Type:Special Alloy
Country:Korea
Standard:KS
Application:martensitic steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
STS440B	KS	Korea

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	869～820	σb/MPa
Yield Strength	711	σ 0.2 ≥/MPa
Elongation	86	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	516～539	-
HRC	30	-

Physical Properties

Thermal expansion	62-45	e-6/K
Thermal conductivity	36-96	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	2210-5476	째C
Density	8789-9433	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)
STS440B 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