321 Stainless Steel Seamless Pipe

Material Grade

ASTM A312 / TP321 (UNS S32100, EN 1.4541)

Titanium-stabilized austenitic stainless steel with excellent high-temperature and corrosion resistance.

Manufacturing Type

Seamless Pipe

Produced by hot or cold rolling; ensures uniform wall thickness and superior mechanical strength.

Outer Diameter (OD)

6 mm – 1219 mm (1/8" – 48")

Full size range available for industrial, structural, or decorative applications.

Wall Thickness

0.5 mm – 50 mm (SCH 5S – SCH XXS)

Meets various pressure and mechanical requirements; custom schedules available.

Length

1 m – 12 m (Single / Double Random or Cut-to-Length)

Customized lengths provided based on project needs.

Surface Finish

2B, Pickled, Bright Annealed, Polished, Brushed (HL)

Aesthetic and protective finishes suitable for different industries.

Chemical Composition (Typical)

Cr: 17.0–19.0%

Ni: 9.0–12.0%

Ti: ≥ 5×(C+N)–0.70%

C: ≤ 0.08%

Mn: ≤ 2.0%

Si: ≤ 1.0%

P: ≤ 0.045%

S: ≤ 0.03%

Titanium stabilization enhances resistance to intergranular corrosion and high-temperature oxidation.

Mechanical Properties

Tensile Strength ≥ 515 MPa

Yield Strength ≥ 205 MPa

Elongation ≥ 40%

Ensures durability and stability under high stress and thermal conditions.

Standards

ASTM A312 / ASME SA312 / EN 10216-5 / JIS G3459

Fully compliant with international stainless steel pipe standards.

Level of deviation

Allowable deviation of standardized outer diameter

D1

±1.5%,The minimum±0.75 mm

D2

±1.0%.The minimum±0.50 mm

D3

±0.75%.The minimum±0.30 mm

D4

±0.50%.The minimum±0.10 mm