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321 Stainless Steel Tubing is a low-carbon austenitic stainless steel with titanium stabilizing carbides to significantly improve its high-temperature performance. Composed of 18-20% chromium, 9-12% nickel, and 0.1-0.8% titanium, 321 Stainless Steel Tubing prevents intergranular corrosion at elevated temperatures and ensures structural integrity.
JBLSTEEL stocks 321 stainless steel tubing in seamless or welded forms,available in various sizes. We also provide a tube cutting service where we supply your tubular products to exact lengths.
321 Stainless Steel Tubing (UNS S32100) is a titanium-stabilized austenitic stainless steel that belongs to the 18-8 series of alloys.By adding titanium (Ti) to the alloy to inhibit chromium carbide precipitation at elevated temperatures, significantly improving resistance to intergranular corrosion, especially in high temperature environments from 800 °F to 1500 °F (approximately 427 °C to 816 °C).
321 Stainless Steel is a low-carbon austenitic stainless steel with titanium stabilizing carbides to significantly improve its high-temperature performance. Composed of 18-20% chromium, 9-12% nickel, and 0.1-0.8% titanium, 321 stainless steel tube prevents intergranular corrosion at elevated temperatures and ensures structural integrity.
| Standard | ASTM A240,ASTM A213,ASTM A312,ASTM A269,JIS G4303,DIN 17440,EN 10088‑1 |
| Klasse | S32100, 1.4541, SUS321 |
| Typen | Seamless,Welded |
| Outer Diameter |
Round Pipe: 4 mm - 200 mm Seamless Pipe: 1/2” NB — 18” NB |
| Wall Thickness | Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness) |
| Länge | 0.1 m-12.5 m; Single Random Length, Double Random Length and Customized Size |
| End | Plain/Beveled |
| Oberflächenbehandlung | Pickling, Polishing, Mirror NO.1, 2B, 2D, HL, 8K, HL, BA, etc |
| Delivery Conditions | Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Drawn |
321H (UNS S32109) is a titanium (Ti)-stabilized austenitic stainless steel that is a high-carbon modified version of grade 321, with a carbon content of 0.04 % to 0.10 %. Compared to 321, 321H maintains higher strength and creep resistance above 1000 °F (approximately 538 °C), making it suitable for higher temperature service.
1. Resistance to Intergranular Corrosion
The addition of titanium inhibits CrC precipitation, prevents intergranular corrosion after welding, especially suitable for long-term work in temperatures from 800 °F-1500 °F.
2. High-temperature Strength
321 stainless steel maintains good strength,creep and stress rupture properties at 1500 °F (approximately 816 °C), superior to 304/304L, suitable for aircraft engines, heat exchangers and boiler piping.
3. Excellent Corrosion Resistance
High chromium-nickel content resists oxidizing and acidic corrosion, making it suitable for use in the chemical and petroleum industries.
4. Good Weldability
Like other austenitic grades,321 has excellent welding characteristics.Post-weld annealing is not required,and the weld heat-affected zone is still resistant to intergranular corrosion.
5. Low Temperature Toughness
Non-magnetic in annealed condition, good low temperature toughness.
6. Moderate Cost
Compared with molybdenum-containing 316/317, 321 is more cost-competitive, and its performance meets the needs of most high-temperature occasions.
JBLSTEEL stocks 321 stainless steel tubing in seamless or welded forms,available in various sizes. We also provide a tube cutting service where we supply your tubular products to exact lengths.
| Klasse | 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 |
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