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STR3 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STR3

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KS STR3

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This page is mainly introduced the STR3 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STR3,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
KS standard martensite heat resistant steel

Steel Garde:STR3
Type:Special Alloy
Country:Korea
Standard:KS
Application:KS standard martensite heat resistant steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
STR31	KS	Korea
STR35	KS	Korea
STR36	KS	Korea
STR37	KS	Korea
STR38	KS	Korea
STR309	KS	Korea
STR310	KS	Korea
STR330	KS	Korea

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	702～761	σb/MPa
Yield Strength	922	σ 0.2 ≥/MPa
Elongation	08	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	874～222	-
HRC	30	-

Physical Properties

Thermal expansion	48-88	e-6/K
Thermal conductivity	39-10	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	0866-7099	째C
Density	2824-5759	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)
STR3 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