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STS440F chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS440F

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KS STS440F

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This page is mainly introduced the STS440F chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS440F,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
STS440F

Steel Garde:STS440F
Type:Special Alloy
Country:Korea
Standard:KS
Application:martensitic steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
STS440F	KS	Korea

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	611～158	σb/MPa
Yield Strength	271	σ 0.2 ≥/MPa
Elongation	22	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	786～180	-
HRC	30	-

Physical Properties

Thermal expansion	07-31	e-6/K
Thermal conductivity	96-52	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	6508-1822	째C
Density	4776-3196	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)
STS440F 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