Stainless Steel 316 / 316L Round Bar is a high-quality austenitic stainless steel product containing molybdenum for superior corrosion and pitting resistance, especially in chloride and marine environments. Type 316L, the low-carbon version, provides enhanced weldability and excellent resistance to intergranular corrosion after welding.
These bars offer a smooth surface finish, high strength, and durability, making them ideal for use in chemical processing, marine equipment, food and pharmaceutical machinery, architectural structures, and decorative applications. Available in both hot rolled and cold drawn conditions, with surface finishes including bright, polished, and #4 or #6 decorative finishes.
Each bar is produced according to ASTM A276 / A479 and EN 10088 standards, ensuring consistent quality, dimensional accuracy, and mechanical performance. Custom diameters, lengths, and tolerances are available upon request.
| Specifications of 316/316L SS round bar: |
| Specifications | ASTM A276, A479 |
| Grade | 316,316L,etc. |
| Length | 1000 mm – 6000 mm or as requested |
| Diameter Range | 10 mm – 200 mm (custom available) |
| Technology | Hot Rolled / Forged / Cold Drawn |
| Surface Finish | Bright, Peeled, Polished, Turned, Pickled |
| Form | Round, Square, Flat, Hexagonal |
| 316/316L round bar Equivalent Grades: |
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST |
| SS 316 | S31600 | 1.4401 / 1.4436 | Z7CND17‐11‐02 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 | SUS 316 | 316S31 / 316S33 | - |
| SS 316L | S31603 | 1.4404 / 1.4435 | Z3CND17‐11‐02 / Z3CND18‐14‐03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 |
| Chemical Composition SS 316 316L Round Bar: |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| SS 316 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 16.00 - 18.00 | 2.00 - 3.00 | 11.00 - 14.00 | 67.845 min |
| SS 316L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 16.00 - 18.00 | 2.00 - 3.00 | 10.00 - 14.00 | 68.89 min |
| Mechanical Properties Of SS 316/316L Hot Rolled Round Bar: |
| Grade | Tensile Strength(MPa) min | Yield Strength 0.2% Proof (MPa) min | Elong (% in 50mm) min |
| SS 316 | 515 | 205 | 40 |
| SS 316L | 485 | 170 | 40 |
| Ferrite Content Testing: |
According to the standard, the smaller the required measurement precision, the greater the number of fields and grid points needed. For example, to achieve a precision of less than 2 %, approximately 30 fields with a 10 × 10 grid (100 points) or 5 fields with a 20 × 20 grid (400 points) are typically required.
| Visual Area Fraction Estimate (%) | Recommended Grid Size (Number of Points) |
| 2 – 5 % | 100 points |
| 5 – 10 % | 49 points |
| 10 – 20 % | 25 points |
| > 20 % | 16 points |
| 10*10=100 (Magnified 100 times) | 20*20=400 (Magnified 500 times) |
The finer the grid and the larger the number of observation fields, the higher the accuracy — and consequently, the higher the testing cost. This method ensures that the ferrite phase in 316 / 316L stainless steel is accurately quantified, guaranteeing product stability and consistent performance in critical applications such as pressure vessels, welded structures, and marine components.
The test is performed according to ASTM E562-19e1 (Metallographic Point Count Method) and/or Magnetic Method, and a Ferrite Content Test Certificate is issued with the measured Fe% value.
All test results are documented and traceable.The combination of magnetic and metallographic methods ensures accuracy and compliance with ASTM, EN, and ISO standards.
| Applications of 316 / 316L Round Bars: |
Chemical and Petrochemical Industry: Storage tanks, heat exchangers, pressure vessels, and process piping exposed to acids, chlorides, and solvents.
Marine and Offshore Structures: Shafts, propellers, fasteners, and fittings resistant to seawater and saline atmospheres.
Food and Beverage Processing: Equipment and components requiring hygiene, easy cleaning, and non-contamination.
Pharmaceutical and Medical Equipment: Machinery parts and support structures where corrosion resistance and purity are critical.
Architectural and Decorative Uses: Handrails, columns, and structural details with polished or mirror finishes for aesthetic appeal.
Pulp and Paper Industry: Rollers, tanks, and equipment exposed to corrosive bleaching chemicals.
Heat Exchangers and Boilers: Components exposed to high temperature and moisture.
| FAQ |
Q1: What is the difference between 316 and 316L stainless steel?
A1: 316L has lower carbon content, providing better resistance to intergranular corrosion after welding.
Q2: What finish options are available for 316/316L round bars?
A2: Bright, polished, or black finishes are available; decorative surfaces like #4 and #6 can be provided upon request.
Q3: Can you provide mill test certificates?
A3: Yes, MTC in EN 10204 3.1 format is provided with every batch.
Q4: What is the typical tolerance on diameter and length?
A4: Diameter tolerance: h9–h11; Length tolerance: ±10mm.
Q5: Do you supply cut-to-size bars?
A5: Yes, customized cut lengths are available as per your order.
| Why Choose SAKYSTEEL : |
| SAKY STEEL'S Quality Assurance (including both Destructive and Non-Destructive) : |
| Custom Processing Capabilities: |
Cut-to-size service
Polishing or surface conditioning
Slitting into strips or foil
Laser or plasma cutting
OEM/ODM welcome
| SAKY STEEL'S Packaging: |
