Stainless Steel 304 / 304L / 316 / 316L Round Bars
Stainless steel 304 and 316 are the most widely used austenitic grades in the world. Grade 304 (18Cr-8Ni) offers excellent corrosion resistance, formability and weldability for general engineering, food processing and architectural use, while Grade 316 (16Cr-10Ni-2Mo) adds molybdenum for improved resistance to pitting in chloride, marine and chemical environments. The low carbon 304L and 316L variants prevent sensitisation and are preferred for welded components.
Nexforge Alloys manufactures and holds ready stock of SS 304, 304L, 316 and 316L round bars in hot rolled black, peeled, bright drawn and centreless ground finishes to ASTM A276 / A479 and ASME SA479. Dual certified 304/304L and 316/316L bars are available, along with cut-to-length and chamfering services.
SS 304 / 304L / 316 / 316L round bars from 6 mm to 500 mm diameter in bright, peeled, polished and black finishes, as per ASTM A276 / A479, dual certified on request.
Stainless Steel 304 / 316 Round Bar Specification
| Parameter | Details |
|---|---|
| Grades | SS 304 (S30400, 1.4301), 304L (S30403, 1.4307), 316 (S31600, 1.4401), 316L (S31603, 1.4404) |
| Standards | ASTM A276, ASTM A479, ASME SA479, ASTM A182 F304 / F316 (forged), EN 10088-3, IS 6603 |
| Size Range | 6 mm to 500 mm diameter |
| Length | Random 3 to 6 metres, or cut to length |
| Condition | Annealed (solution annealed and pickled) |
| Surface Finish | Hot rolled black, peeled, bright drawn, centreless ground, polished |
| Tolerance | h8 / h9 / h10 / h11 or as per drawing |
| Testing | Chemical, tensile, hardness, IGC (ASTM A262 Practice E), UT on request |
| Certification | EN 10204 3.1 mill test certificate |
Chemical Composition (% by weight)
| Grade (UNS) | C | Mn | Si | P | S | Cr | Ni | Mo | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| SS 304 (S30400) | 0.08 max | 2.00 max | 1.00 max | 0.045 max | 0.030 max | 18.0 - 20.0 | 8.0 - 11.0 | - | 0.10 max | Balance |
| SS 304L (S30403) | 0.030 max | 2.00 max | 1.00 max | 0.045 max | 0.030 max | 18.0 - 20.0 | 8.0 - 12.0 | - | 0.10 max | Balance |
| SS 316 (S31600) | 0.08 max | 2.00 max | 1.00 max | 0.045 max | 0.030 max | 16.0 - 18.0 | 10.0 - 14.0 | 2.00 - 3.00 | 0.10 max | Balance |
| SS 316L (S31603) | 0.030 max | 2.00 max | 1.00 max | 0.045 max | 0.030 max | 16.0 - 18.0 | 10.0 - 14.0 | 2.00 - 3.00 | 0.10 max | Balance |
Mechanical Properties
| Grade | Tensile Strength (min) | 0.2% Yield Strength (min) | Elongation (min) | Hardness (typ. max) | Density |
|---|---|---|---|---|---|
| SS 304 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 40 % | 201 HB | 7.93 g/cm³ |
| SS 304L | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 40 % | 201 HB | 7.93 g/cm³ |
| SS 316 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 40 % | 217 HB | 7.98 g/cm³ |
| SS 316L | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 40 % | 217 HB | 7.98 g/cm³ |
Values are minimum or typical figures as per the referenced standards and are for guidance only. Please refer to the mill test certificate supplied with the material for actual values.
Key Features
- Large ready stock in bright and black finish for fast delivery
- 316 / 316L give superior pitting resistance in chloride and marine environments
- Low carbon L grades resist sensitisation after welding
- Excellent formability, machinability (with correct tooling) and weldability
Applications
- Shafts, spindles, studs, bolts and machined components
- Food, dairy, pharmaceutical and beverage processing equipment
- Pump, valve and heat exchanger components
- Marine fittings, architectural and structural hardware
- Chemical, textile and paper industry equipment