Stainless Steel Bars & Rods
High Precision Round, Hex, and Square Bars in Bright, Polish, and Black Finishes.
Precision Engineered Bar Stock
Pannani Tubes is a premier stockist of Stainless Steel Round and Hex Bars conforming to ASTM A276 and ASTM A479 standards. We specialize in "Pump Shaft Quality" (PSQ) bars that require extreme straightness and diameter tolerance (h9/h11). Whether you need Cold Drawn Bright Bars for CNC machining or Peeled & Polished Bars for decorative applications, we maintain ready stock in grades 304, 316L, 410, and 17-4PH.
SS Round Bar
Available in Hot Rolled (Black) and Cold Drawn (Bright) finishes. Ideal for shafts, fasteners, and machining.
- Dia: 3mm to 300mm
- Tolerance: h9, h11, k12
- Length: 1 to 6 Meters
SS Hex Bar
Hexagonal bars designed for manufacturing nuts, bolts, and valves. Excellent machinability.
- Size: 5mm to 100mm
- Finish: Bright, Polish
- Grade: 303, 304, 316
Technical Specifications
Chemical Composition & Mechanical Properties (ASTM A276)
Chemical Composition (%)
| Grade | C (Max) | Mn (Max) | P (Max) | S (Max) | Si (Max) | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| SS 304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0 - 20.0 | 8.0 - 10.5 | - |
| SS 304L | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0 - 20.0 | 8.0 - 12.0 | - |
| SS 316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0 - 18.0 | 10.0 - 14.0 | 2.0 - 3.0 |
| SS 316L | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0 - 18.0 | 10.0 - 14.0 | 2.0 - 3.0 |
| SS 410 | 0.15 | 1.00 | 0.040 | 0.030 | 1.00 | 11.5 - 13.5 | 0.75 | - |
Mechanical Properties (Typical)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB Max) |
|---|---|---|---|---|
| SS 304 / 304L | 515 Min | 205 Min | 40 Min | 201 |
| SS 316 / 316L | 515 Min | 205 Min | 40 Min | 217 |
| SS 410 | 485 Min | 275 Min | 20 Min | - |
| 17-4 PH | 930 Min | 725 Min | 10 Min | 363 |
Need Custom Lengths or Finishes?
We offer cutting, centerless grinding, and polishing services. Send us your specific diameter and tolerance requirements today.