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Standard Stainless Steel 314 (UNS S31400) high-silicon heat-resistant pipes are engineered for demanding thermal applications, including radiant tubes, heat-treating furnace components, annealing covers, petroleum refining cracking tubes, and glass manufacturing equipment. The combined chromium-nickel-silicon chemistry builds a highly protective protective oxide scale that resists thermal shock and carbon penetration.
| Product Form | Outer Diameter (OD) | Wall Thickness (WT) | Standard Length |
|---|---|---|---|
| Seamless Pipe (SMLS) | 10.3mm – 610.0mm (1/8" – 24") | 1.24mm – 59.54mm (SCH 5S – SCH 160) | 6m / 12m / Fixed Length |
| Welded Pipe (ERW / EFW) | 15.0mm – 1219.0mm (1/2" – 48") | 1.5mm – 30.0mm (SCH 5S – SCH 80S) | 6m / Cut-to-length |
| Radiant / Furnace Tube | 15.88mm – 101.6mm | 1.5mm – 10.0mm | Straight 12m / U-Bended |
| Element | Cr | Ni | Si | C | Mn | P | S | Fe |
|---|---|---|---|---|---|---|---|---|
| Min. | 23.0 | 19.0 | 1.50 | - | - | - | - | Bal. |
| Max. | 26.0 | 22.0 | 2.50 | 0.25 | 2.00 | 0.045 | 0.030 | Bal. |
| Tensile Strength Rm (MPa) | Yield Strength Rp0.2 (MPa) | Elongation A5 (%) | Hardness (HB) | Density (g/cm³) | Melting Range (°C) |
|---|---|---|---|---|---|
| ≥ 550 | ≥ 240 | ≥ 30 | ≤ 223 | 7.90 | 1375 – 1425 |
