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ASTM A269 / ASME SA269 TP316L Polished Austenitic Stainless Steel Welded Tube
ASTM A269 specifies the requirements for seamless and welded austenitic stainless steel 304/ 304L/ 316L/ ... / 317/ 321/ 347 tubing intended for general corrosive service, which commonly used in piping and plumbing applications.
Tube Manufacturing & Process:
Welded Construction: Formed from flat-rolled stainless steel strip/sheet, longitudinally welded (TIG, laser, or plasma welding).
Polished Finish: Surface is mechanically polished (e.g., #4 brushed, mirror, or electropolished) to improve:
Hygiene: Reduces bacterial adhesion (critical for food, pharma, and medical applications).
Aesthetics: Smooth, reflective appearance.
Corrosion Resistance: Minimizes surface defects that could trap contaminants.
Equivalent Grades of ASTM A269 TP316L Polished Stainless Steel Welded Tube
STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
SS 316L | 1.4404 / 1.4435 | S31603 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 | Z3CND17‐11‐02 / Z3CND18‐14‐03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
Chemical Composition of ASTM A269 TP316L Polished Stainless Steel Welded Tube
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
SS 316L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 16.00 - 18.00 | 2.00 - 3.00 | 10.00 - 14.00 | 68.89 min |
Physical Properties of ASTM A269 TP316L Polished Stainless Steel Welded Tube
Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Co-eff of Thermal Expansion (µm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Elec Resistivity (nΩ.m) | |||
0-100°C | 0-315°C | 0-538°C | At 100°C | At 500°C | |||||
316/L/H | 8000 | 193 | 15.9 | 16.2 | 17.5 | 16.3 | 21.5 | 500 | 740 |
Comparison with Other Standards
Applications
Pharmaceutical/Biotech: Clean-in-place (CIP) systems, process piping.
Food & Beverage: Sanitary tubing, dairy processing.
Chemical Processing: Acid/caustic fluid transfer.
Marine/Coastal: Saltwater-exposed components.
Medical Devices: Implants, surgical instruments (post-processing may be required).