BS 3100 Chemical Composition of Stainless Steel
BS 3100, Steel castings for general engineering purposes, was published in 1991 and covers a wide range of steel casting grades. These include the stainless steel in the following tables. Some of these grades are similar to grades published more recently in EN 10283, as European grades, but BS 3100 uses the 'traditional' BS grade designation types. This table should be useful in identifying some of the older 'BS' castings grades. EN 10283 does not supersede BS3100 as this also includes non-stainless steel casting grades.
Only the chemical composition of the stainless steel in BS3100 are listed. Grades shown with a suffix 'LT 196' are intended for low temperature applications and are required to pass a Charpy impact test at -196 C by the standard.
BS 3100 chemical composition table
| Grade |
Chemical composition % by mass (max unless otherwise stated) |
| . |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Nickel |
Others |
| 410C21 |
0.15 |
1.0 |
1.0 |
0.040 |
0.040 |
11.5/13.5 |
- |
1.00 |
Cu 0.30 |
| 420C28 |
0.20 |
1.0 |
1.0 |
0.040 |
0.040 |
11.5/13.5 |
- |
1.00 |
Cu 0.30 |
| 420C29 |
0.20 |
1.0 |
1.0 |
0.040 |
0.040 |
11.5/13.5 |
- |
1.00 |
Cu 0.30 |
| 425C12 |
0.06 |
1.0 |
1.0 |
0.040 |
0.030 |
11.5/14.0 |
0.40/1.0 |
3.5/4.5 |
- |
| 425C11 |
0.10 |
1.0 |
1.0 |
0.040 |
0.030 |
11.5/13.5 |
0.60 |
3.4/4.2 |
- |
| 302C25 |
0.12 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
- |
8.0 min |
- |
| 304C12 |
0.03 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
- |
8.0/12.0 |
- |
| 304C12 LT196 |
0.03 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
- |
8.0/12.0 |
- |
| 304C15 |
0.08 |
1.5 |
2.0 |
0.040 |
0.040 |
18.0/21.0 |
- |
8.0/11.0 |
- |
| 304C15 LT196 |
0.08 |
1.5 |
2.0 |
0.040 |
0.040 |
18.0/21.0 |
- |
8.0/11.0 |
- |
| 347C17 |
0.08 |
1.5 |
2.0 |
0.040 |
0.040 |
18.0/21.0 |
- |
9.0/12.0 |
Nb 8xC/1.0 |
| 316C12 |
0.03 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
2.0/3.0 |
9.0 min |
- |
| 316C12 LT196 |
0.03 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
2.0/3.0 |
9.0 min |
- |
| 316C16 |
0.08 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
2.0/3.0 |
9.0 min |
- |
| 316C16 LT196 |
0.08 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
2.0/3.0 |
9.0 min |
- |
| 317C16 |
0.08 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
3.0/4.0 |
9.0 min |
- |
| 318C17 |
0.08 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
2.0/3.0 |
9.0 min |
Nb 8xC/1.00 |
| 332C11 |
0.07 |
1.5 |
1.5 |
0.040 |
0.040 |
19.0/22.0 |
2.0/3.0 |
27.5/30.5 |
Cu 3.0/4.0 |
| 332C13 |
0.04 |
1.0 |
1.0 |
0.040 |
0.040 |
24.5/26.5 |
1.75/2.25 |
4.75/6.00 |
Cu 2.75/3.25 |
| 332C15 |
0.08 |
1.5 |
1.5 |
0.040 |
0.040 |
21.0/27.0 |
1.75/3.00 |
4.0/7.00 |
N 0.10/0.25 |
| 420C24 |
0.25 |
2.0 |
1.0 |
0.050 |
0.050 |
12.0/16.0 |
- |
- |
- |
| 452C11 |
1.00 |
2.0 |
1.0 |
0.050 |
0.050 |
25.0/30.0 |
1.5 |
4.0 |
- |
| 452C12 |
1.0/2.0 |
2.0 |
1.0 |
0.050 |
0.050 |
25.0/30.0 |
1.5 |
4.0 |
- |
| 302C35 |
0.2/0.4 |
2.0 |
2.0 |
0.050 |
0.050 |
17.0/22.0 |
1.5 |
6.0/10.0 |
- |
| 309C30 |
0.5 |
2.5 |
2.0 |
0.050 |
0.050 |
22.0/27.0 |
1.5 |
10.0/14.0 |
- |
| 309C40 |
0.5 |
2.0 |
2.0 |
0.050 |
0.050 |
25.0/30.0 |
1.5 |
8.0/12.0 |
- |
| 310C45 |
0.5 |
3.0 |
2.0 |
0.050 |
0.050 |
22.0/27.0 |
1.5 |
17.0/22.0 |
- |
| 311C11 |
0.5 |
3.0 |
2.0 |
0.050 |
0.050 |
17.0/23.0 |
1.5 |
23.0/28.0 |
- |
| 330C12 |
0.75 |
3.0 |
2.0 |
0.050 |
0.050 |
13.0/20.0 |
1.5 |
30.0/40.0 |
- |
| 331C60 |
0.75 |
3.0 |
2.0 |
0.050 |
0.050 |
15.0/25.0 |
1.5 |
36.0/46.0 |
- |
| 334C11 |
0.75 |
3.0 |
2.0 |
0.050 |
0.050 |
10.0/20.0 |
1.5 |
55.0/65.0 |
- |
| 309C32 |
0.20/0.45 |
1.5 |
2.5 |
0.040 |
0.040 |
24.0/28.0 |
1.5 |
11.0/14.0 |
N 0.20 |
| 309C35 |
0.20/0.50 |
1.5 |
2.0 |
0.040 |
0.040 |
24.0/28.0 |
1.5 |
11.0/14.0 |
- |
| 310C40 |
0.30/0.50 |
1.5 |
2.0 |
0.040 |
0.040 |
24.0/27.0 |
1.5 |
19.0/22.0 |
- |
| 330C11 |
0.35/0.55 |
1.5 |
2.0 |
0.040 |
0.040 |
13.0/17.0 |
1.5 |
33.0/37.0 |
- |
| 331C40 |
0.35/0.55 |
1.5 |
2.0 |
0.040 |
0.040 |
17.0/21.0 |
1.5 |
37.0/41.0 |
- |
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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