ASTM A453 Grade 660 Chemical Composition with permisable variations. The chemical composition is equivalent to UNS S66286 referred to as the trade name Alloy a286 as one of the prominent stainless steel grades.
| Grade | ASTM A453 Grade 660 Class A/B/C/D | |
|---|---|---|
| UNS Number | S66286 | |
| Elements | Content, % | Product Analysis Variation, Over or Under, % |
| Carbon (C) | 0.08 max | 0.01 over |
| Manganese (Mn) | 2.00 max | 0.04 |
| Phosphorus (P) | 0.040 max | 0.005 over |
| Sulfur (S) | 0.030 max | 0.005 over |
| Silicon (Si) | 1.00 max | 0.05 |
| Nickel (Ni) | 24.0-27.0 | 0.2 |
| Chromium (Cr) | 13.5-16.0 | 0.2 |
| Molybdenum (Mo) | 1.00-1.50 | 0.05 |
| Titanium (Ti) | 1.90-2.35 | 0.05 |
| Aluminum (Al) | 0.35 max | 0.05 over |
| Vanadium (V) | 0.10-0.50 | 0.03 |
| Boron (B) | 0.001-0.010 | 0.0004 under to 0.001 over |
