| GB | JIS | DIN | ASTM/AISI/SAE |
| 40 Cr | SCr40 | 41Cr4 | 5140 |
| C | SI | MN | S | P. | CR | Ni/Cu |
| 0.38-0.43 | 0.15-0.35 | 0.70-0.90 | 0.025 (max) | 0.025 (max) | 0.70-0.90 | 0.25 (max) |
| Barre rotonde laminate a caldo | da 16 mm A 350 mm |
| Barre trafilate a freddo | da 6 mm A 50 mm |
| Barre tonde forgiate | 200 mm-800 mm |
| Ossigeno | Azoto | Idrogeno |
| 20 ppm (max) | 90 ppm (max) | 2 ppm (max) |
| R | B | C | D | |
| MAX | MAX | MAX | MAX | |
| Sottile | 2.5 | 2.0 | 0.5 | 0.5 |
| Spesso | 1.5 | 1.0 | 1.0 | 1.0 |