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Buying Guide
SS 316 vs SS 316L
SS 316L is the low-carbon version of SS 316. Both contain molybdenum for chloride resistance, but 316L (max 0.03% C) avoids carbide precipitation during welding, making it the standard choice for welded marine and chemical fabrications.
Side-by-side comparison
| Attribute | SS 316 | SS 316L |
|---|---|---|
| Carbon (C) max | 0.08% | 0.03% |
| Chromium | 16–18% | 16–18% |
| Nickel | 10–14% | 10–14% |
| Molybdenum | 2–3% | 2–3% |
| Tensile strength | ≥ 515 MPa | ≥ 485 MPa |
| Weldability | Good | Excellent |
| Corrosion in chlorides | Very good | Very good (better in welded joints) |
| Common uses | Marine hardware, surgical | Pharma vessels, marine pipework, chemical tanks |
When to choose SS 316
Choose SS 316 for non-welded marine and chemical parts — bolts, fittings, machined components.
Buy SS 316 on MetaleMartWhen to choose SS 316L
Choose SS 316L for welded marine, chemical, and pharma fabrications where intergranular corrosion in the weld zone must be eliminated.
Buy SS 316L on MetaleMartFrequently asked questions
Is 316L stronger than 316?
Slightly weaker in yield strength (170 vs 205 MPa) but the difference rarely matters in practice.
Which grade is used for surgical implants?
316L is the standard for surgical and medical implants because of its superior biocompatibility and resistance to body fluids.
Is 316L more expensive than 316?
Typically 5–10% more due to tighter chemistry control.