We are a manufacturer and supplier of stainless steel bar, DONGSHANG offers a wide range of sizes of stainless steel bars to meet various demands, stainless steel materials have high strength and good corrosion resistance, and the bars can be used in industrial, machining, and fabrication applications.
There are several specifications covering hot-finished or cold-finished bars, stainless steel bars should be produced conforming to these standards and specifications, like ASTM A276, the shapes have round bar, square bar, hex bar, and flat bar.
Stainless Steel Bar Specifications
- ASTM A276 / A276M-Standard Specification for Stainless Steel Bars and Shapes
- ASTM A479 / A479M-Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
- ASTM A484 / A484M-Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings
- ASTM A582 / A582M-Standard Specification for Free-Machining Stainless Steel Bars
Stainless Steel Grades
Stainless steel grades are available for bars which include Austenitic, Austenitic-ferritic (Duplex), Ferritic, and Martensitic grades, these grades have specific properties applied in specific applications, common stainless steel includes 304/304L, 316/316L, 321, 347 and 400 series grades, with multiple surface finish options.
| Stainless Steel Grades | Chemical Composition % By Mass Max Unless Stated | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| UNS No | AISI No. | C | Si | Mn | P | S | Cr | Mo | Ni | Others |
| S30400 A276 For Bar | 304 | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 18.0/20.0 | 8.0/11.0 | ||
| S30403 A276 For Bar | 304L | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 18.0/20.0 | 8.0/12.0 | ||
| S31600 | 316 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0/18.0 | 2.00/3.00 | 10.0/14.0 | N 0.10 |
| S31603 | 316L | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0/18.0 | 2.00/3.00 | 10.0/14.0 | N 0.10 |
| S31635 | 316Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0/18.0 | 2.00/3.00 | 10.0/14.0 | Ti 5x (C+N) / 0.70 N 0.10 |
| S31700 | 317 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0/20.0 | 3.0/4.0 | 11.0/15.0 | N 0.10 |
| S31703 | 317L | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0/20.0 | 3.00/4.00 | 11.0/15.0 | N 0.10 |
| S32100 | 321 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0/19.0 | – | 9.0/12.0 | Ti 5 X C Min/0.70 N 0.10 |
| S34700 | 347 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0/19.0 | – | 9.0/13.0 | Nb+Ta 10 X C Min/1.0 |
Stainless Steel Bar Shapes And Types
Stainless steel sizes range from 5 mm to 500 mm, the length can be random or cut into fixed lengths, we offer tight sizes and dimensions for stainless steel bars, there are several shapes for options, round bar, square bar, hexagon bar, flat bar, we have large stainless steel bar stock and various size for option.
Stainless Steel Round Bar
Stainless Steel Square Bar
Stainless Steel Hexagon Bar
Stainless Steel Flat Bar
Stainless Steel Bar Tolerances
Stainless steel bar permitted variations in size should be in accordance with standards, the tolerances are stated in ASTM A484 specification, cold finished and hot finished bar tolerances are separately shown, there are also different shapes on different tolerance, like the round bar, square bar, hex bar, and flat bar, cold finished round bar tolerances are shown below.
| Size Tolerances – Cold Finished Round Bars – A484 | ||
|---|---|---|
| Specified Sizes Inches (Mm) | Over In. (Mm) | Under In. (Mm) |
| .1/16 To 5/16” (1.5 To 8.00), Excl | 0.001 (0.03) | 0.001 (0.03) |
| 5/16” To 1/2” (8.0 To 13.0) Excl | 0.0015 (0.04) | 0.0015 (0.04) |
| 1/2 To 1” (13.0 To 25.0) Excl | 0.002 (0.05) | 0.002 (0.05) |
| 1” To 1-1/2” (25.0 Tp 38.0) Excl | 0.0025 (0.06) | 0.0025 (0.06) |
| 1-1/2” To 3-1/4” (38.0 To 83.0) Excl | 0.003 (0.08) | 0.003 (0.08) |
| 3-1/4” T O4” (83.0 To 100) Excl | 0.005 (0.13) | 0.005 (0.13) |
Manufacture And Conditions
Cold finishing is a common method for stainless steel bars, made from stainless steel plates or strips, cold forming and extrusion, then a cold drawn and annealed process is carried out, making the bar surface bright and smooth, a polishing service is available.
- hot worked
- hot worked and annealed
- hot worked, annealed and cold worked
- hot worked, annealed, and heat-treated