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SUS 321 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS 321

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JIS SUS 321

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This page is mainly introduced the SUS 321 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS 321,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Heat-resisting steel plate, sheet and strip

Steel Garde:SUS 321
Type:Stainless Steels
Country:Japan
Standard:JIS
Standard Number:

ITEM Standard Number Descriptions

1 G 4312 (2011) Heat-resisting steel plate, sheet and strip
Metallographic Structure:Austenite
Application:Heat-resisting steel plate, sheet and strip

ITEM	Standard Number	Descriptions
1	G 4312 (2011)	Heat-resisting steel plate, sheet and strip

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
KSUS321	NKK	Japan
SUS 321	JIS	Japan
SUS 321	JIS	Japan
SUS 321	JIS	Japan
SUS 321	JIS	Japan
SUS 321	JIS	Japan
SUS 321	JIS	Japan
SUS 321	JIS	Japan
SUS 321	JIS	Japan
SUS 321 FB	JIS	Japan
SUS 321 HFB	JIS	Japan
SUS 321 HTB	JIS	Japan
SUS 321 HTF	JIS	Japan
SUS 321 HTP	JIS	Japan
SUS 321 TB	JIS	Japan
SUS 321 TF	JIS	Japan
SUS 321 TKA	JIS	Japan
SUS 321 TP	JIS	Japan
SUS 321 TPY	JIS	Japan
SUS 321FB	JIS	Japan
SUS 321HFB	JIS	Japan
SUS 321HTP	JIS	Japan
SUS 321TKA	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	17.00	19.00
Ni	9.00	13.00
Mo
N
Ti	5×C％

Mechanical Properties

Tensile strength	684～725	σb/MPa
Yield Strength	312	σ 0.2 ≥/MPa
Elongation	86	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	243～998	-
HRC	30	-

Physical Properties

Thermal expansion	20-41	e-6/K
Thermal conductivity	42-56	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	9791-4026	째C
Density	8749-5043	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 321 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