Which is better SUS316 or SS316L stainless steel plate?
Jun 23, 2025
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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.
What Do SUS316 and SS316L Mean?
| 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 |
SUS316 VS. SS316L cold rolled stainless steel plate：Chemical Composition Comparison
| 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) |
SUS316 VS. SS316L stainless flat sheet：Mechanical Properties
| 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 |
SUS316 VS. SS316L stainless steel thin plate：Application Scenarios
| 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 |
is ss316l low carbon stainless steel plate better than 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.
SS316 stainless steel Product Forms
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
📩 Looking for Reliable SUS316 or SS316L Plate Supplier?
We supply SUS316 / SS316 / SS316L stainless steel plates with full mill certificates and global export support. Whether you're building a pressure vessel, chemical tank, or marine platform - we provide precision-cut, certified, and ready-to-ship stainless plates.
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