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  • ASTM A312 TP321H steel pipes

ASTM A312 TP321H steel pipes

  • Material Standard: ASTM A312
  • Grade No.: TP321H,S32109,1.4878
  • Type: Seamless welded pipes
  • End: Beveled End,Plain End


SS 321 is a stabilized austenitic stainless steel similar to 321 but with a titanium addition. This titanium reduces or prevents carbide precipitation during welding and in 800 - 1500 °F (427 - 816 °C) service. It also improves the elevated temperature properties of the alloy. 321 stainless steel pipe is non-magnetic and heat resistant for continuous service at elevated temperatures.

HT PIPE is one of producer and manufacturer of the 321 and 321h stainless steel pipes and tubes, we are committed to providing customers with better quality stainless steel pipes, we provide stainless steel seamless pipes and welded pipes with wall thickness from sch5 to XXS, and at the same time provide customers with Cutting and customized prefab welding services.

Specification of Stainless steel 321 Pipes, 321h Pipes

ASTM A312: Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

ASTM A213: Standard Specification for Seamless Ferritic and  Austenitic Alloy-Steel Boiler, Super heater, and Heat-Exchanger Tubes

ASTM A269: Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service

Outside Diameter: 6.00mm to 914.4mm, 1/2” to 48"

Thickness Range: 0.3mm - 50mm, SCH 5, SCH 10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS

Length: single random, double random and required length

Technique: Hot rolling, Hot work, Cold rolling, Cold drawn

Form: Seamless Pipe & Tube, SAW/ERW/EFW Pipe & Tube

End: PE(plain end), BE(beveled end)

Standard: ASME B36.10, ASME B36.19

Type: SS321 seamless Pipe, TP321 welded Pipe, SS321H seamless Tube, TP321H welded Tube, 1.4541 seamless Tube, 1.4878 Pipe

Stainless steel 321 Pipe, ss321h Pipe  Chemical Composition

Grade UNS C≤ Mn P≤ S≤ Si≤ Cr Mo Ni
TP321 S32100 0.08 2 0.045 0.03 1 17.0-19.0 - 9.0-12.0
321H S32109 0.04-0.1 2 0.045 0.03 1 17.0-19.0 - 9.0-12.0
Stainless steel 321 Pipe, ss321h Pipe Mechanical Properties

Mechanical properties

Tensile, min, ksi[MPa]

Yield, min, ksi[MPa]

Elongation, %(min)

Hardness, HB(max)

TP321, 321H





Stainless steel 1.4541 Pipe, ss 1.4878 Pipe Equivalent Grades

321 1.4541 S32100 SUS321 - - - X6CrNiTi18-10
321H 1.4878 S32109 SUS 321H - - - X12CrNiTi18-9

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