| STANDARD | UNS | WERKSTOFF NR. | JIS | 
| Alloy 660 | S66286 | 
				Incoloy A-286 | 
			SUH 660 | 
| Grade | C | Ni | Si | Mo | Mn | P | Cr | Al | S | Ti | |
| Alloy 660 | min. | - | 24. | - | 1.0 | - | - | 13.5 | - | - | 1.9 | 
| max. | 0.08 | 27.0 | 0.1 | 1.5 | 2.0 | 0.025 | 16.0 | 1.35 | 0.35 | 2.35 | |
| Grade | Tensile Strength (ksi) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (ksi) min | Hardness | 
| 660 | 140 | 12 | 95 | - |