Chemical compositions of stainless steels to BS 6258
Introduction
BS 6258, Hollow steel 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The standard is withdrawn. Stainless steel hollow bar products are now covered by EN Standard 10294 part 2 published in 2012.
As an alternative to scanning down the list try the ‘find’ facility on your keyboard, using the ‘Ctrl’ and ‘F’ keys together. Type in the term you are looking for in the dialog box that then appears.
The data given is not intended to replace that shown in individual standards to which reference should always be made.
BS 6258 chemical composition table
| Grade |
Chemical composition (% by mass – max unless stated) |
| . |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Others |
| Ferritic steels |
| 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 steels |
| 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 steels |
| 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 |
– |
← Back to previous
↑ Top
