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STS444TB chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS444TB

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This page is mainly introduced the STS444TB chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS444TB,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Stainless steel for boiler and heat exchanger tubes

Steel Garde:STS444TB
Type:Stainless Steels
Country:Korea
Standard:KS
Standard Number:

ITEM Standard Number Descriptions

1 D 3577 (2007) Stainless steel for boiler and heat exchanger tubes
Metallographic Structure:Ferrite
Application:Stainless steel for boiler and heat exchanger tubes

ITEM	Standard Number	Descriptions
1	D 3577 (2007)	Stainless steel for boiler and heat exchanger tubes

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
STS444	KS	Korea
STS444TP	KS	Korea

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.025
Si		1.00
Mn		1.00
P		0.040
S		0.030
Cr	17.00	20.00
Ni		0.60
Mo	1.75	2.50
N		0.025
Ti,Nb,Zr	8×(C％+N％)	0.80

Mechanical Properties

Tensile strength	549～152	σb/MPa
Yield Strength	203	σ 0.2 ≥/MPa
Elongation	56	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	641～182	-
HRC	30	-

Physical Properties

Thermal expansion	88-46	e-6/K
Thermal conductivity	62-84	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	8771-8971	째C
Density	3169-1977	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)
STS444TB 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