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In modern industry, stainless steel materials are widely used for their excellent corrosion resistance, mechanical properties, and machinability.ASTM A312 321/H Stainless Steel 1/4inch Seamless Tube is a high-quality stainless steel tube commonly used in applications requiring extremely high temperature and corrosion resistance.
| Standard | ASME/ASTM SA/A213, ASTM A269, ASME/ASTM SA/A789 |
| Grade | TP316/L, TP304/L, TP321/L, TP310S, TP316Ti, 2205, 2507... |
| Outer Diameter | 1/4 "to 2"（OD≤1 1/2", All Bight Annealed ），DN6-DN50 |
| Wall thickness | Sch10s, Sch40, Sch40s, Sch80, Sch80s |
| Certificates | ISO, PED |
| Surface | Polished/Bight Annealed OD≤1 1/2", All Bight Annealed ( If you need annealed pickled, we also provide) |
| Processes | Cold Rolled, Cold Drawing |
| End Cut | Plain End ( PE ) / Bevel End ( Be ) |
| Inspection | 100% |
| Price Term | FOB , CFR , CIF or as negotiation |
| Payment | T / T , L / C or as negotiation |
| Delivery time | 2 weeks after received your deposit ( Normally according to the order quantity ) |
| Package | woven bag or as per customer’s requirement |
| Element | 321 Composition | 321H Composition |
| C | ≤ 0.08 | 0.04 - 0.10 |
| Si | ≤ 0.75 | ≤ 0.75 |
| Mn | ≤ 2.00 | ≤ 2.00 |
| P | ≤ 0.045 | ≤ 0.045 |
| S | ≤ 0.030 | ≤ 0.030 |
| Cr | 17.0 - 19.0 | 17.0 - 19.0 |
| Ni | 9.0 - 12.0 | 9.0 - 12.0 |
| Ti | 5x(C+N) - 0.70 | 4x(C+N) - 0.70 |
| Property | 321/H |
| Density (g/cm³) | 7.92 |
| Melting Point (°C) | 1399-1420 |
| Thermal Conductivity (W/m·K) | 16.2 (at 100°C) |
| Electrical Resistivity (μΩ·cm) | 74.0 (at 20°C) |
2,000 Tons Stainless Steel Seamless Pipes
200 Tons Stainless Steel Seamless Tubes
500 Tons of Stainless Steel Flange Raw Materials
10,000 ㎡ Indoor Warehouse
Orders inspected and shipped within 2 weeks, reducing lead times and financial pressures.
With 16 years of expertise, SMLSCO secures favorable raw material prices, benefiting customers.