Product Overview
SN HSS-972 Hardening Salt is a high-temperature salt bath compound for the hardening of High Speed Steel (HSS) cutting tools and hot-work die steels. The bath operates from 970°C up to 1300°C — the full range required for hardening M2, M35, T1, H13, H11 and similar grades that demand precise high-temperature austenitising.
The salt provides an oxygen-free, neutral environment at temperature. This prevents decarburisation — the most common cause of HSS tool failure after heat treatment — and eliminates the scale and oxide layer that would otherwise require additional grinding or blasting. Tools emerge bright and ready for quench transfer.
Technical Specifications
| Product Code | SN HSS-972 |
| Salt Type | High-temperature neutral hardening salt |
| Working Temperature | 970°C – 1300°C |
| Physical Form | Granular salt compound |
| Packaging | 25 kg HDPE sealed bags |
| Surface Effect | No decarburisation · No scale · No oxidation |
| Compatible Steel Grades | M2, M35, T1 (HSS) · H11, H13 (hot-work die) |
| Bath Maintenance | Use Regenerator |
| Recommended Pre-Heat | Use SN-660 bath at 750°C–850°C before transfer |
| Documentation | COA, MSDS, TDS included with every order |