321 Stainless Steel Pipe & Tube: Titanium-Stabilized Post-Weld Corrosion Resistant Piping

What is 321 Stainless Steel Pipe & Tube?

321 is a titanium-stabilized austenitic stainless steel pipe, designed to eliminate post-weld intergranular corrosion by fixing carbon atoms with titanium. It excels in high-temperature welding scenarios across industrial sectors.

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 stabilization: Prevents post-weld intergranular corrosion, ensuring structural reliability after welding • Good high-temperature stability: Suitable for long-term service at up to 870°C, ideal for heat exchanger tubes and boiler components • Excellent processability: Easy to weld and form, compatible with welding-intensive pipeline installation • Superior to 304 in high-temperature scenarios: Balances corrosion resistance and cost for industrial high-temp piping

321 vs 304 Stainless Steel Pipe (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.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.