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STF4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STF4

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KS STF4

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This page is mainly introduced the STF4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STF4,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.

Steel Garde:STF4
Type:Special Alloy
Country:Korea
Standard:KS
Application:Carbide for cutting tools

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
STF4	KS	Korea

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	330～824	σb/MPa
Yield Strength	145	σ 0.2 ≥/MPa
Elongation	10	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	806～354	-
HRC	30	-

Physical Properties

Thermal expansion	39-77	e-6/K
Thermal conductivity	55-60	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	5930-0939	째C
Density	3517-8515	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)
STF4 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