ASTM A269 TP347 Bright Annealing Tube
Material：Stainless Steel
Surface Treatment：Polish, Sandblasting, Pickling
Shape：Round
Technicial：Cold Rolling/Drawing
Outside Diameter：3.18-810mm
Wall Thickness：0.2-40mm
Size：8"-72"(DN200-DN1800)/219.1mm-1829mm
Standard：ASTM A312, ASTM A213, ASTM A269, etc.
Transport Package：with Plastic Caps on Both End, Pack Into Bundle
What is ASTM A269 TP347 bright annealed tube?
ASTM A269 TP347 bright annealed tube is a high-performance austenitic stainless steel tube stabilized with niobium (columbium), designed for superior resistance to intergranular corrosion and high-temperature service. It undergoes bright annealing in a controlled hydrogen atmosphere, resulting in an exceptionally clean, smooth, and oxide-free surface.
ASTM A269 TP347 bright Annealed seamless tube
Advantages of ASTM A269 TP347 bright annealed tube
It eliminates internal stress caused by cold working, prevents oxidation, keeps the tube surface bright metal texture, enhances corrosion resistance, and has a surface finish of Ra ≤ 0.2 μm, making it an ideal choice for sanitary and high-purity systems.
What industries use TP347 bright annealed tubes?
Chemical & Petrochemical plants – for heat exchangers and process piping
Food & Beverage – sanitary piping and steam lines
Pharmaceutical – pure water and sterile systems
Power Generation – superheaters and boiler tubes
Aerospace – thermal and exhaust applications
TP347 stainless steel tubing surface treatment
Bright Annealed (BA): Mirror-like metallic finish, Ra ≤ 0.2μm
Electropolished (EP): Further enhanced smoothness, Ra ≤ 0.1μm (optional)
Pickled and Annealed (AP): Matte, clean finish, Ra ≤ 1.6μm
Precision bright annealed TP347 tubes Specifications
| Standard | Equivalent Grade |
|---|---|
| EN/DIN | 1.4550 / X6CrNiNb18-10 |
| JIS | SUS347 |
| ISO | X6CrNiNb18-10 |
| ASTM | TP347 / UNS S34700 |
| Item | Specification |
|---|---|
| Standard | ASTM A269 / ASME SA269 |
| Steel Grade | TP347 (UNS S34700) |
| Tube Type | Seamless (Cold drawn) |
| Outer Diameter Range | 6 – 101.6 mm (customizable) |
| Wall Thickness | 0.5 – 5 mm |
| Surface Finish | Bright Annealed (BA) – Ra ≤ 0.2 μm |
| Tensile Strength (min) | ≥515 MPa |
| Yield Strength (min) | ≥205 MPa |
| Elongation (min) | ≥35% |
| Hardness (max) | ≤90 HRB |
Why choose GNEE
GNEE supplies ASTM A269 TP347 seamless tubes with:
Ultra-smooth inner surface: Ra ≤ 0.2 μm
Mill Test Certificates (EN 10204 3.1)
Eddy current & hydrostatic testing available
Custom lengths and packaging for export
Polished, pickled, or custom finishes upon request
Get a free quote now and receive samples upon request!
1.4550 stainless steel pipe supplier
GNEE Stainless Steel Testing
UNS S34700 Seamless Tube Packaging
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