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STS321HTF chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS321HTF

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KS STS321HTF

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This page is mainly introduced the STS321HTF chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS321HTF,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:STS321HTF
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
STS321TB	KS	Korea
STS321TF	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	593～939	σb/MPa
Yield Strength	127	σ 0.2 ≥/MPa
Elongation	86	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	780～517	-
HRC	30	-

Physical Properties

Thermal expansion	89-86	e-6/K
Thermal conductivity	79-80	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	9099-5078	째C
Density	0992-8891	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)
STS321HTF 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