If you're sourcing stainless steel for chemical equipment, marine structures, or food-grade applications, you've likely encountered terms like SUS316, SS316, and SS316L. These grades are closely related, but there are critical differences-especially when it comes to corrosion resistance, weldability, and long-term performance.
This guide compares SUS316 vs SS316L stainless steel plate, helping procurement teams and engineers make informed decisions.
| Grade | Standard System | Common Use Region |
|---|---|---|
| SUS316 | JIS (Japan) | Japan, Korea, some Chinese mills |
| SS316 | AISI / ASTM (USA) | Global use (ASTM A240, A213) |
| SS316L | AISI / ASTM (USA) | Low-carbon version of SS316 |
| Element | SUS316 / SS316 (%) | SS316L (%) |
|---|---|---|
| Chromium | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel | 10.0 – 14.0 | 10.0 – 14.0 |
| Molybdenum | 2.0 – 3.0 | 2.0 – 3.0 |
| Carbon | ≤ 0.08 | ≤ 0.03 (low carbon) |
| Property | SUS316 / SS316 | SS316L |
|---|---|---|
| Tensile Strength (Rm) | 515 – 750 MPa | 485 – 700 MPa |
| Yield Strength (Rp0.2) | ≥ 205 MPa | ≥ 170 MPa |
| Elongation | ≥ 40% | ≥ 45% |
| Hardness (HB) | ≤ 217 | ≤ 217 |
| Application | Recommended Grade |
|---|---|
| Welded tanks & pressure vessels | ✅ SS316L |
| Offshore structures | ✅ SUS316 / SS316L |
| Chemical and acid piping | ✅ SS316L |
| Food & beverage machinery | ✅ SUS316L |
| High-strength marine components | ✅ SUS316 |
Yes. SS316L is generally considered superior to SUS316 in applications involving welding or corrosive environments due to its lower carbon content (≤0.03%), which significantly reduces the risk of intergranular corrosion after welding.
While the corrosion resistance and mechanical properties of both grades are similar, SS316L stainless steel corrosion resistant plate is the preferred choice for pressure vessels, sanitary systems, and components that must comply with ASME or EN standards. However, SUS316 is still suitable for non-welded components.
Thickness: 2.0 mm to 50 mm
Width: up to 1500 / 2000 mm
Finish: 2B, No.1, No.4, HL, mirror
Standards: ASTM A240, JIS G4304, EN 10088-2
Certificates: EN 10204 3.1, NACE MR0175, PED
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