ASTM A269 TP310S Bright Annealed Stainless Steel Tube

If you are looking for a stainless steel tubing solution that offers outstanding heat resistance, ultra-clean surfaces, and precise dimensional accuracy for extreme high-temperature and high-purity environments, our TP310S (UNS S31008, 1.4845) tubing is an ideal choice. Manufactured with a premium alloy composition containing 24–26% chromium and 19–22% nickel, it can operate continuously at temperatures up to 1150°C and intermittently up to 1200°C, far exceeding the heat resistance limits of conventional 304 or 316 stainless steel.

 

The ASTM A269 TP310S stainless steel tubes we supply are annealed in a hydrogen/inert atmosphere (1050–1150°C), resulting in oxidation-free surfaces without acid pickling and without harmful surface residues. Compared with standard annealed and pickled (AP) tubes, which typically have a matte finish, surface roughness (Ra) of 1.0–1.5 μm, and residual acid contamination, our bright annealed tubes improve heat transfer efficiency by 15–20% and effectively suppress bacterial growth, which is especially critical for pharmaceutical, food processing, and semiconductor applications.

ASTM A269 TP310S Stainless Steel Seamless Pipe specification

Standard	ASTM A269,ASME SA269
Pipe Type	Bright Annealed Stainless Steel Tubing
Grades	304, 304L, 316, 316L, 321, 310S
Dimensions	Outer Diameter (OD): 1.00 mm to 76.2 mm
Wall Thickness	0.2 mm to 6.0 mm
Length	Up to 12 meters (custom lengths available upon request)
Manufacturing Process	Cold Drawn, Bright Annealed, Seamless
Material Surface Finish	Bright Annealed (BA), Mirror Polished, No. 4 Finish
End Type	Plain End (PE), Beveled End (BE), Threaded End (TE)
Certifications	ISO 9001, EN 10204 3.1 / 3.2, PED, ASME

 

Chemical Composition of ASTM A269 TP310S Stainless Steel Seamless Tubes

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	N
310	min. max.	- 0.25	- 2.00	- 1.50	- 0.04	- 0.030	24.0 26.0	-	19.0 22.0
310S	min. max.	- 0.08	- 2.00	- 1.50	- 0.04	- 0.030	24.0 26.0	-	19.0 22.0

 

Mechanical Properties of ASTM A269 TP310S Stainless Steel Seamless Tubes

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
310	515	205	40	95	217
310S	515	205	40	95	217

 

Key differences: 310S BA vs. AP tubing

Item	Bright Annealed (BA)	Pickled (AP)
Heat Treatment Atmosphere	Hydrogen / inert gas protection, no oxidation	Air annealing + pickling to remove oxide scale
Surface Appearance	Mirror bright, clean and free of dirt	Matte dark surface with slight pits
Surface Roughness	Ra 0.2–0.5μm	Ra 1.0–1.5μm
Cleanliness	Ultra high purity, no acid or iron ion residue	Pickling residue exists, easy to stain and rust
Production Cost	Higher	Lower

 

What is the difference between TP310 and TP310S?

TP310 has a maximum carbon content of 0.25%, while TP310S has a carbon content limited to below 0.08%. The low-carbon TP310S effectively inhibits carbide precipitation during welding, thereby reducing the risk of intergranular corrosion.

 

ASTM A269 TP310S Seamless BA Tubing price

Size (OD x WT) - mm	Size (OD x WT) - inch	Unit Price (USD/MT FOB)	Unit Price (USD/Meter)	Condition
6.35 x 0.89	1/4" x 0.035"	$9,250 – $9,600	~$1.20 – $1.40	Seamless / BA
9.53 x 1.24	3/8" x 0.049"	$8,900 – $9,300	~$2.40 – $2.70	Seamless / BA
12.70 x 1.24	1/2" x 0.049"	$8,750 – $9,100	~$3.30 – $3.60	Seamless / BA
19.05 x 1.65	3/4" x 0.065"	$8,600 – $8,950	~$6.50 – $7.00	Seamless / BA
25.40 x 2.11	1" x 0.083"	$8,500 – $8,850	~$10.80 – $11.50	Seamless / BA

Note: Prices are indicative and may vary based on quantity, surface finish, and delivery terms (FOB/CIF). Contact us for an official quotation.

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What tests does GNEE provide when supplying TP310S BA pipe?

To ensure safety under high-temperature conditions, every batch of products supplied by GNEE includes:

100% Eddy Current Testing (ET): Detects minute defects in the pipe wall.

Hardness Testing: Ensures a hardness between 70-80 HRB for easy bending in the field.

Flanging and Flattening Tests: Verifies material plasticity.

PMI Material Composition Analysis: Ensures nickel-chromium content meets standards.

 

ASTM A269 TP310S Seamless BA Tubing HS Code

Region/Standard	HS Code	Description (Technical Interpretation)
International (Generic)	7304.41	Tubes, pipes and hollow profiles, seamless, of iron or steel: Of stainless steel, cold-drawn or cold-rolled (cold-reduced).
China (Export)	7304.41.90.00	Other seamless circular cross-section tubes, pipes, and hollow profiles, of cold-drawn or cold-rolled stainless steel.

 

Shipping and Packaging:

All our products can be shipped via various methods, including Full Container Load (FCL), Less than Container Load (LCL), and air freight. Waterproof paper and steel strapping are used for packaging, meeting standard export sea freight packaging requirements and suitable for various modes of transport, or customized according to customer requirements.