ASTM A213 TP321 Stainless Steel Seamless Pipe

What is ASTM A213 TP321?

ASTM A213 TP321 is a titanium-stabilized austenitic stainless steel seamless pipe, designed to resist intergranular corrosion after welding. It is mainly used in high-temperature heat exchanger tubes, boiler superheaters and exhaust system pipelines.

Equivalent Grades (Horizontal)

UNS: S32100 | JIS: SUS321 | GB: 06Cr18Ni11Ti | EN: X6CrNiTi18-10 | W.Nr.: 1.4541

Chemical Composition (wt%, Horizontal)

C: ≤0.08 | Si: ≤1.00 | Mn: ≤2.00 | P: ≤0.045 | S: ≤0.030 | Cr: 17.00-19.00 | Ni: 9.00-12.00 | Ti: ≥5×C | Fe: Balance

Key Properties (20°C, Annealed, Horizontal)

Density: 7.93g/cm³ | Melting Point: 1400-1450°C | Tensile Strength: ≥515N/mm² | Yield Strength: ≥205N/mm² | Elongation: ≥40% | Hardness: ≤201HB

Core Characteristics

• Titanium stabilizes carbon atoms, effectively preventing post-weld intergranular corrosion and improving structural stability • Good high-temperature stability, capable of long-term service at temperatures up to 870°C • Excellent weldability and formability, suitable for welding-intensive pipeline installation • Superior to TP304 in high-temperature and post-weld corrosion resistance scenarios

TP321 vs TP304 (Horizontal)

Stabilizer: 321 (Titanium) | 304 (None) | Post-weld Corrosion: 321 (Excellent) | 304 (Poor) | High-Temp Limit: 321 (≤870°C) | 304 (≤800°C) | Application: 321 (High-Temp Welding) | 304 (General Purpose)

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N	Other
321	min. max	- 0.08	2.00	0.75	0.045	0.030	17.0 19.0	-	9.0 12.0	0.10	Ti=5(C+N) 0.70
321H	min. max	0.04 0.10	2.00	0.75	0.045	0.030	17.0 19.0	-	9.0 12.0	-	Ti=4(C+N) 0.70

 

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
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