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STS321TF chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS321TF

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This page is mainly introduced the STS321TF chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS321TF,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Steel tubes for fired heater

Steel Garde:STS321TF
Type:Stainless Steels
Country:Korea
Standard:KS
Standard Number:

ITEM Standard Number Descriptions

1 D 3587 (1991) Steel tubes for fired heater
Metallographic Structure:Austenite
Application:Steel tubes for fired heater

ITEM	Standard Number	Descriptions
1	D 3587 (1991)	Steel tubes for fired heater

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
STS321	KS	Korea
STS321TKA	KS	Korea
STS321HTB	KS	Korea
STS321HTF	KS	Korea
STS321TB	KS	Korea
STS321TPY	KS	Korea
STS321FB	KS	Korea
STS321HFB	KS	Korea
STS321HTP	KS	Korea
STS321TP	KS	Korea

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.08
Si		1.00
Mn		2.00
P		0.045
S		0.030
Cr	17.00	19.00
Ni	9.00	13.00
Mo
N
Ti	5×C％

Mechanical Properties

Tensile strength	339～789	σb/MPa
Yield Strength	942	σ 0.2 ≥/MPa
Elongation	83	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	856～280	-
HRC	30	-

Physical Properties

Thermal expansion	67-39	e-6/K
Thermal conductivity	72-32	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7154-8222	째C
Density	8173-2142	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)
STS321TF 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