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SUS 309 STB chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS 309 STB

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JIS SUS 309 STB

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This page is mainly introduced the SUS 309 STB chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS 309 STB,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Stainless steel boiler and heat exchanger tubes

Steel Garde:SUS 309 STB
Type:Stainless Steels
Country:Japan
Standard:JIS
Standard Number:

ITEM Standard Number Descriptions

1 G 3463 (2012) Stainless steel boiler and heat exchanger tubes
Metallographic Structure:Austenite
Application:Stainless steel boiler and heat exchanger tubes

ITEM	Standard Number	Descriptions
1	G 3463 (2012)	Stainless steel boiler and heat exchanger tubes

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
SUS 309 STP	JIS	Japan
SUS 309S	JIS	Japan
SUS 309S	JIS	Japan
SUS 309S	JIS	Japan
SUS 309S	JIS	Japan
SUS 309S	JIS	Japan
SUS 309S	JIS	Japan
SUS 309S	JIS	Japan
SUS 309S	JIS	Japan
SUS 309S TPY	JIS	Japan
KSUS309S	NKK	Japan
SUS 309STP	JIS	Japan
SUS 309STP Y	JIS	Japan

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.08
Si		1.00
Mn		2.00
P		0.045
S		0.03
Cr	22.00	24.00
Ni	12.00	15.00
Mo
N

Mechanical Properties

Tensile strength	490～438	σb/MPa
Yield Strength	831	σ 0.2 ≥/MPa
Elongation	65	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	409～087	-
HRC	30	-

Physical Properties

Thermal expansion	40-40	e-6/K
Thermal conductivity	83-45	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	5547-4182	째C
Density	6925-2115	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)
SUS 309 STB 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