15N20 is an acid-resistant steel commonly used for forging with high carbon steels to bring out clear contrast in billets with damascus patterns for knives, swords, and more. It contains a high nickel content.
15N20 pairs well with high carbon steels like 1084, K720, 1095, 80CrV2, etc.
Chemical Composition
C |
Mn |
Ni |
P |
S |
Si |
0.75% |
0.4% |
2.00% |
0.02% |
0.01% |
0.3% |
Normalizing
Normalizing is a process aimed at refining the grain and relieving stress in the blades before hardening when necessary. Condursal Z1100 can be used to reduce surface decarburization and scale. Recommended time and temperature for varying thicknesses. Once the knife has cooled and becomes black and magnetic, it can be reintroduced into the oven.
| (1st cycle) 900°C (10-15 min) | (2nd cycle) 815°C (10-15 min) | (3rd cycle) 730°C (10-15 min) |
| Hardening | Soaking Time | HRC |
| 850 - 890°C | 1.5 minutes per mm | 60-62 |
Tempering:
2 times for 40 minutes
| Temperature | Hardness HRC |
| 150°C | 59 |
| 180°C | 58 |
| 200°C | 57 |
| 230°C | 55 |
| 260°C | 57 |
| 290°C | 52 |
| 320°C | 50 |