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STR409 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STR409

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KS STR409

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This page is mainly introduced the STR409 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STR409,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Heat - resisting steel plates and sheets

Steel Garde:STR409
Type:Stainless Steels
Country:Korea
Standard:KS
Standard Number:

ITEM Standard Number Descriptions

1 D 3732 (2002) Heat - resisting steel plates and sheets
Metallographic Structure:Ferrite
Application:Heat - resisting steel plates and sheets

ITEM	Standard Number	Descriptions
1	D 3732 (2002)	Heat - resisting steel plates and sheets

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
STR409L	KS	Korea

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.08
Si		1.00
Mn		1.00
P		0.04
S		0.03
Cr	10.50	11.75
Ni		0.60
Mo
N
Ti	6×C％	0.75

Mechanical Properties

Tensile strength	271～685	σb/MPa
Yield Strength	051	σ 0.2 ≥/MPa
Elongation	92	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	377～215	-
HRC	30	-

Physical Properties

Thermal expansion	35-67	e-6/K
Thermal conductivity	69-65	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	0278-1314	째C
Density	6608-8868	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)
STR409 Stainless Steels	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