BS 3146-2 Chemical Composition of Stainless Steel
BS 3146-2 is the material standard for stainless steel and some nickel based alloy castings, to be made by the investment (or lost wax) process. Martensitic, precipitation hardening, austenitic austenitic-ferritic duplex grades are included. The chemical composition of the stainless steel and some nickel based alloys in the standard are listed.
Despite the advent of the European standards system, this BS is still current. There is no EN standard replaces it.
BS 3146-2 chemical composition table
| Grade |
| Chemical composition (% by mass - max unless stated) |
| |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Others |
| Martensitic Stainless Steel Grades |
| ANC1- A |
0.15 |
0.2/1.2 |
0.2/1.0 |
0.035 |
0.035 |
11.5/13.5 |
- |
1.0 |
- |
| ANC1- B |
0.12/0.2 |
0.2/1.2 |
0.2/1.0 |
0.035 |
0.035 |
11.5/13.5 |
- |
1.0 |
- |
| ANC1- C |
0.2/0.3 |
0.2/1.2 |
0.2/1.0 |
0.035 |
0.035 |
11.5/13.5 |
- |
1.0 |
- |
| ANC2 |
0.12/0.25 |
0.2/1.0 |
0.2/1.0 |
0.035 |
0.035 |
15.5/20.0 |
- |
1.5/3.0 |
- |
| Austenitic Stainless Steel Grades |
| ANC3 - A |
0.12 |
0.2/2.0 |
0.2/2.0 |
0.035 |
0.035 |
17.0/20.0 |
- |
8.0/12.0 |
- |
| ANC3 - B |
0.12 |
0.2/2.0 |
0.2/2.0 |
0.035 |
0.035 |
17.0/20.0 |
- |
8.5/12.0 |
Nb 8xC/1.10 |
| ANC4 - A |
0.08 |
0.2/1.5 |
0.2/2.0 |
0.035 |
0.035 |
18.0/20.0 |
3.0/4.0 |
11.0/14.0 |
- |
| ANC4 - B |
0.08 |
0.2/1.5 |
0.2/2.0 |
0.035 |
0.035 |
17.0/20.0 |
2.0/3.0 |
10.0 min |
- |
| ANC4 - C |
0.12 |
0.2/1.5 |
0.2/2.0 |
0.035 |
0.035 |
17.0/20.0 |
2.0/3.0 |
10.0 min |
Nb 8xC/1.10 |
| ANC5 - A |
0.5 |
0.2/3.0 |
0.20/2.0 |
- |
- |
22.0/27.0 |
- |
17.0/22.0 |
- |
| ANC5 - B |
0.5 |
0.2/3.0 |
- |
- |
15.0/25.0 |
- |
36.0/46.0 |
- |
- |
| ANC5- C |
0.75 |
0.2/3.0 |
0.2/2.0 |
- |
- |
10.0/20.0 |
- |
55.0/65.0 |
- |
| ANC6 - A |
0.15/0.3 |
0.75/2.0 |
0.2/1.0 |
0.035 |
0.035 |
20.0/25.0 |
- |
10.0/15.0 |
- |
| ANC6 - B |
0.15/0.3 |
0.75/2.0 |
0.2/1.0 |
0.035 |
0.035 |
20.0/25.0 |
- |
10.0/15.0 |
W 2.5/3.5 |
| ANC6 - C |
0.05/0.15 |
0.75/2.0 |
0.2/1.0 |
0.035 |
0.035 |
20.0/25.0 |
- |
10.0/18.0 |
W 2.5/3.5 |
| Precipitation Hardening Grades |
| ANC20 A |
0.07 |
0.2/2.0 |
0.2/1.0 |
0.025 |
0.025 |
12.5/15.5 |
0.5/2.5 |
3.0/6.0 |
Cu 1.0/3.5 Nb 0.5 |
| ANC20 B |
0.07 |
0.2/2.0 |
0.2/1.0 |
0.025 |
0.025 |
12.5/15.5 |
0.5/2.5 |
3.0/6.0 |
Cu 1.0/3.5 Nb 0.5 |
| Duplex Stainless Steel Grades |
| ANC21 |
0.05 |
0.75 |
0.75 |
0.050 |
0.050 |
25.0/27.0 |
1.75/2.25 |
4.75/6.00 |
Cu 2.75/3.25 N 0.10 |
Note
For grades ANC1, ANC3 and ANC4, where specified, the sulphur (S) level may be as high as 0.3% where free machining properties are required.
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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