ASME SA213 TP321 Bright Annealed Seamless Tube Manufacturer

ASTM A213 TP321 stainless steel bright-annealed tube is a seamless tubing product specifically designed for high-temperature applications such as boilers, superheaters, and heat exchangers.

The TP321 bright-annealed tubes supplied by GNEE are manufactured through cold-drawing or hot-rolling, followed by solution annealing at 920–1150°C or stabilization treatment at 850–930°C. Produced from 321 austenitic stainless steel, the alloy is titanium-stabilized to prevent intergranular corrosion during prolonged exposure to elevated temperatures - up to 1600°F (870°C).

The "bright annealed" finish is achieved through heat treatment in a non-oxidizing atmosphere, resulting in a clean, smooth, and highly corrosion-resistant surface without the need for additional polishing. This makes TP321 BA tubes ideal for fluid transport systems, heat exchanger tubing, instrumentation lines, and other applications requiring excellent surface cleanliness and high-temperature stability.

ASME SA213 TP321 Bright Annealed Seamless Tube

ASTM A269 TP 304 Stainless Steel Tubing Specifications

TP321 Tube Chemical Composition

WEIGHT %	NI	CR	MN	C	SI	S	P
MIN	9.00	17.00
MAX	12.00	19.00	2.00	.080	1.00	.030	.045

ASTM A213 TP321 Mechanical Properties:

Density	8.0 g/cm³
Melting Point	1454 °C (2650 °F)
Tensile Strength	Psi – 75000 , MPa – 515
Yield Strength (0.2%Offset)	Psi – 30000 , MPa – 205
Elongation	35 %

ASTM A213 Stainless Steel Tubes Outside Diameter and Wall Thickness Tolerance

OD, mm	OD Tolerance
< 25.4	+/- 0.10
25.4 – <= 38.1	+/- 0.15
> 38.1 -< 50.8	+/- 0.20
50.8 -< 63.5	+/- 0.25
63.5 -< 76.2	+/- 0.30
76.2 – <= 101.6	+/- 0.38
> 101.6 – <= 190.5	+0.38/-0.64
> 190.5 – <= 228.6	+0.38/-1.14

OD, mm	WT Tolerance
<= 38.1	+20%/-0
> 38.1	+22%/-0

ASTM A213 TP321 Stainless Steel Seamless Pipes Physical Properties

Grade	Density (kg/m³)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
321	8027	193	16.6	17.2	18.6	16.1	22.2	500	720

Equivalent Material for 321 Grade Stainless Steel

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
321	S32100	321S31	58B, 58C	1.4541	X6CrNiTi18-10	2337	SUS 321

Applications:

-Food preparation equipment particularly in chloride environments
-Laboratory benches & equipment
-Coastal architectural panelling, railings & trim
-Boat fittings
-Chemical containers, including for transport
-Heat Exchangers
-Woven or welded screens for mining, quarrying & water filtration
-Threaded fasteners
-Springs

If you have any project requirements for ASTM A213 TP321 stainless steel pipes, please click the button below to contact us immediately. We are happy to serve you.

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Value-add services

GNEE, with 18 years of experience in pipe manufacturing, is a trusted supplier of stainless steel pipes. The factory not only produces annealed steel pipes in standard sizes but also offers extended lengths of 18 meters and 25 meters to meet diverse customer needs. The factory is fully equipped, including cold rolling mills, smokeless furnaces, immersion tanks, ultrasonic eddy current cleaning machines, and physical and chemical laboratories.

Highest quality packaging and shipping

The package is packed with waterproof paper and steel strapping, which meets the standard export sea freight packaging requirements and is suitable for various modes of transportation or can be customized according to customer requirements.