Trim Designations
| API Trim No |
Seat Face |
Wedge Face |
Stem |
BS Designation |
| 1 |
13 Chrome |
13 Chrome |
13 Chrome |
CR13 |
| 2 |
304 |
304 |
A276 304 |
18-8 Ti |
| 3 |
310 |
310 |
A276 310 |
25-20 |
| 5 |
Stellite 6 facing |
Stellite 6 facing |
A276 410 or 420 |
HF |
| 6 |
13 Chrome against 30% min nickel facing |
A276 410 or 420 |
CR and Cu-Ni |
| 8 |
13 Chrome against Stellite 6 facing |
A276 410 or 420 |
CR + HF |
| 9 |
Monel |
Monel |
Monel |
Ni-Cu |
| 10 |
316 |
316 |
A276 316 |
18-10-2 |
| 11 |
Monel against Stellite 6 facing |
Monel |
HF-Ni |
| 12 |
316 against Stellite 6 facing |
A276 316 |
- |
| 13 |
Alloy 20 |
Alloy 20 |
B473 |
- |
| 14 |
Alloy 20 against Stellite 6 facing |
B473 |
- |
| 15 |
Stellite 6 facing |
Stellite 6 facing |
A276 304 |
- |
| 16 |
Stellite 6 facing |
Stellite 6 facing |
A276 316 |
- |
| - |
347 |
347 |
A276 347 |
18-8 Nb |