BS 6258 Chemical Composition of Stainless Steel
BS 6258, Stainless steel hollow bars for machining, was published in 1988 and includes a range of ferritic, martensitic and austenitic stainless steel hollow bars for supply in either the hot or cold finished condition. The 'bars' (essentially thick walled tubes) must be seamless to comply with BS 6258.
The standard is current. Stainless steel hollow bar products are not currently covered by European standards. Solid bars for general engineering purposes are however covered by EN 10088-3
BS 6258 chemical composition table
| Grade |
Chemical composition (% by mass - max unless stated) |
| . |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Others |
| Ferritic stainless steel |
| 403S17 |
0.08 |
1.00 |
1.00 |
0.040 |
0.030 |
12.0/14.0 |
- |
0.50 |
- |
| 430S17 |
0.08 |
1.00 |
1.00 |
0.040 |
0.030 |
16.0/18.0 |
- |
0.50 |
- |
| Martensitic stainless steel |
| 410S21 |
0.09/0.15 |
1.00 |
1.00 |
0.040 |
0.030 |
11.5/13.5 |
- |
1.00 |
- |
| 420S29 |
0.14/0.20 |
1.00 |
1.00 |
0.040 |
0.030 |
11.5/13.5 |
- |
1.00 |
- |
| 420S37 |
0.20/0.28 |
1.00 |
1.00 |
0.040 |
0.030 |
12.0/14.0 |
- |
1.00 |
- |
| 431S29 |
0.12/0.20 |
1.00 |
1.00 |
0.040 |
0.030 |
15.0/18.0 |
- |
2.00/3.00 |
- |
| Austenitic stainless steel |
| 303S31 |
0.12 |
1.00 |
2.00 |
0.060 |
17.0/19.0 |
1.00 |
8.00/10.0 |
|
| 302S31 |
0.12 |
1.00 |
2.00 |
0.045 |
0.030 |
17.0/19.0 |
- |
8.00/10.0 |
- |
| 304S11 |
0.030 |
1.00 |
2.00 |
0.045 |
0.030 |
17.0/19.0 |
- |
9.00/12.0 |
- |
| 304S15 |
0.06 |
1.00 |
2.00 |
0.045 |
0.030 |
17.5/19.0 |
- |
8.00/11.0 |
- |
| 304S31 |
0.07 |
1.00 |
2.00 |
0.045 |
0.030 |
17.0/19.0 |
- |
8.00/11.0 |
- |
| 321S31 |
0.08 |
1.00 |
2.00 |
0.045 |
0.030 |
17.0/19.0 |
- |
9.00/12.0 |
Ti 5C/0.80 |
| 347S31 |
0.08 |
1.00 |
2.00 |
0.045 |
0.030 |
17.0/19.0 |
- |
9.00/12.0 |
Nb 10C/1.00 |
| 316S11 |
0.030 |
1.00 |
2.00 |
0.045 |
0.030 |
16.5/18.5 |
2.0/2.50 |
11.00/14.0 |
- |
| 316S13 |
0.030 |
1.00 |
2.00 |
0.045 |
0.030 |
16.5/18.5 |
2.5/3.00 |
11.5/14.5 |
- |
| 316S31 |
0.07 |
1.00 |
2.00 |
0.045 |
0.030 |
16.5/18.5 |
2.0/2.50 |
10.5/13.5 |
- |
| 316S33 |
0.07 |
1.00 |
2.00 |
0.045 |
0.030 |
16.5/18.5 |
2.5/3.00 |
11.0/14.0 |
- |
| 320S31 |
0.08 |
1.00 |
2.00 |
0.045 |
0.030 |
16.5/18.5 |
2.0/2.50 |
11.0/14.0 |
Ti 5C/0.80 |
| 310S31 |
0.15 |
1.50 |
2.00 |
0.045 |
0.030 |
24.0/26.0 |
- |
19.0/22.0 |
- |
Related References:
1. British Standard BS for Stainless Steel for General Application
2. British Standard for Welding and Fabrication of Stainless Steel
3. BS ASTM Tolerances Surface Finish and Test of Stainless Steel
4. British EN Standard Strength of Steel
5. BS Pipe Tube and Fitting Standard and Specification
6. BS ASTM Tolerances Surface Finish and Test of Stainless Steel
7. EN ASTM Stainless Steel for Pressure Vessel Application
9. BS Aerospace S100 Chemical Composition Mechanical Properties
10. BS Aerospace S500 Chemical Composition Mechanical Properties
11. BS 3100 Chemical Composition of Stainless Steel
12. BS 3100 1991 Cast Steel Chemical Composition
13. BS 970 Stainless Steel Chemical Composition
14. BS 6744 Chemical Composition and Mechanical Properties of stainless steel
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