We manufacture welded 316 and 316L stainless steel tube from 6mm to 63.5mm OD, 0.4mm to 2mm wall thickness, to ASTM A249 and A269 standards.
We manufacture welded 316 and 316L stainless steel tube from 6mm to 63.5mm OD, 0.4mm to 2mm wall thickness, to ASTM A249 and A269 standards. 316 adds 2-3% molybdenum to the 304-type composition, significantly improving resistance to pitting and crevice corrosion in chloride-containing and chemically aggressive environments; 316L is the low-carbon variant for welded applications.
| Element | 316 | 316L |
|---|---|---|
| Chromium (Cr) | 16.0–18.0 | 16.0–18.0 |
| Nickel (Ni) | 10.0–14.0 | 10.0–14.0 |
| Molybdenum (Mo) | 2.0–3.0 | 2.0–3.0 |
| Carbon (C) | ≤0.08 | ≤0.03 |
| Manganese (Mn) | ≤2.00 | ≤2.00 |
| Silicon (Si) | ≤0.75 | ≤0.75 |
| Phosphorus (P) | ≤0.045 | ≤0.045 |
| Sulfur (S) | ≤0.030 | ≤0.030 |
| Nitrogen (N) | ≤0.10 | ≤0.10 |
| Iron (Fe) | Balance | Balance |
| Property | 316 | 316L |
|---|---|---|
| Tensile strength | ≥515 MPa | ≥485 MPa |
| Yield strength (0.2%) | ≥205 MPa | ≥170 MPa |
| Elongation | ≥40% | ≥40% |
| Density | 8.0 g/cm³ | 8.0 g/cm³ |
Figures shown are standard reference values for this grade; exact limits are governed by the applicable ASTM/ASME specification on your order and Mill Test Certificate.
| 316 | 321 | |
|---|---|---|
| Primary strength | Chloride/pitting corrosion resistance | Sustained high-temperature stability |
| Stabilizing element | None (relies on low carbon in 316L) | Titanium |
| Typical use | Chemical processing, marine, chloride exposure | High-temperature welded service (exhaust, process equipment) |
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