321 Stainless Steel Pipe & Tube

What is 321 Stainless Steel Pipe & Tube?

321 Stainless Steel Pipe & Tube is a titanium-stabilized austenitic stainless steel product, specially designed to resist intergranular corrosion after welding. It focuses on high-temperature stability, suitable for high-temperature piping and heat exchange components.

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: Fixes carbon atoms to prevent post-weld intergranular corrosion, ensuring structural integrity after welding • Good high-temperature stability, capable of long-term service at up to 870°C, suitable for high-temperature exhaust and heat exchanger tubes • Excellent weldability and formability, easy to assemble into welding-intensive piping systems • Superior to 304 series in high-temperature and post-weld corrosion resistance, balancing performance and cost

321 vs 304 Stainless Steel Pipe & Tube (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.