316 / 316L Stainless Steel Flat Bar
Stellanox Steel supplies corrosion-resistant 316 / 316L Stainless Steel Flat Bars, designed for performance in aggressive environments such as marine, chemical, and pharmaceutical industries. Thanks to the presence of molybdenum, 316 flat bars offer superior resistance to pitting, crevice corrosion, and chlorides—making them ideal for coastal and sanitary applications.
316L, the low-carbon variant, ensures weld integrity and prevents carbide precipitation in welded joints, which is critical in high-purity and high-pressure environments.
What is 316 / 316L Stainless Steel Flat Bar?
316 / 316L Stainless Steel Flat Bar is a rectangular flat-section bar made from austenitic stainless steel alloy containing chromium, nickel, and 2–3% molybdenum. The molybdenum content enhances its resistance to chemicals and saltwater corrosion, while the “L” variant (316L) improves its performance in welding and heat-affected zones.
These flat bars are ideal for fabrication, structural reinforcement, bracing, and hygienic environments where corrosion resistance and cleanability are critical.
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Stainless Steel |
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Duplex Stainless Steel |
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Flanges |
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Fasteners |
Key Features of 316 / 316L Stainless Steel Flat Bar
- Molybdenum-Enriched: Offers superior resistance to chlorides and acidic corrosion.
- Excellent Weldability: 316L minimizes carbide precipitation in welded zones.
- Non-Magnetic (Annealed): Slightly magnetic after cold working.
- High Strength and Durability: Withstands mechanical stress and chemical attack.
- Smooth Surface Finish: Suitable for architectural, marine, and pharmaceutical use.
- Sanitary & Food-Grade Safe: Ideal for environments requiring strict hygiene standards.
Specification Chart – 316 / 316L Stainless Steel Flat Bar
| Property | Details |
|---|---|
| Grade | 316 / 316L (UNS S31600 / S31603) |
| Standards | ASTM A276, ASTM A484, EN 10088-3 |
| Thickness Range | 3 mm – 50 mm |
| Width Range | 12 mm – 300 mm |
| Length | Up to 6 meters or custom-cut |
| Finish | Hot Rolled, Cold Drawn, Polished |
| Tolerance | As per ASTM or customer specifications |
Chemical Composition – 316 / 316L Stainless Steel Flat Bar
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Carbon (C) | ≤ 0.08 (316), ≤ 0.03 (316L) |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties – 316 / 316L Stainless Steel Flat Bar
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 515 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (HRB) | ≤ 95 (Annealed) |
| Density | 8.00 g/cm³ |
Equivalent Grades – 316 / 316L Stainless Steel Flat Bar
| Standard | Grade |
|---|---|
| ASTM | 316 / 316L |
| EN | 1.4401 / 1.4404 |
| JIS | SUS 316 / SUS 316L |
| UNS | S31600 / S31603 |
| DIN | X5CrNiMo17-12-2 / X2CrNiMo17-12-2 |
Applications of 316 / 316L Stainless Steel Flat Bar
- Marine and Offshore Components
- Pharmaceutical and Cleanroom Equipment
- Heat Exchangers and Process Piping
- Bracing, Mounting, and Framing Hardware
- Dairy and Food Industry Machinery
- Architectural and Coastal Installations
Benefits of 316 / 316L Stainless Steel Flat Bar
- Outstanding corrosion resistance, especially in marine and acidic environments
- Ideal for welded structures—no risk of intergranular corrosion with 316L
- Non-reactive and hygienic surface for medical and food processing
- Highly formable and machinable for custom fabrication
- Long-lasting and low maintenance in extreme conditions
- Great strength-to-weight ratio for structural use
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