Weld Mold® 9551
Patent Pending
Weld Mold 9551 has special alloying that gives it unique properties. Capable of being work hardened after welding, maximum hardness is achieved with a temper as low as 1050˚F and designed to provide superior hardness retention through 1,200°F. Designed to be used where cobalt based materials would be used on hot trim tools and shallow impression overlays.
Applications
Designed specifically to be used as a lower cost, more available substitute for or together with Stellite® type of weld overlays in forge tooling, On trim tooling, productivity has been improved as much as 4 times over traditional materials. Weld Mold 9551 has also shown itself to be exceptionally versatile in shallow forging die cavities when used in conjunction with 9580, improving die life by more than 5 times over traditional materials.
9551 is also used to overlay preform tooling such as benders, roll dies and edgers.
Procedure
Remove all defects and surface contaminants. Preheat will be dictated by base metal, maintain temperature during welding utilizing short arc lengths. Peening is critical to mechanically relieve stresses when flood welding small or large cavities. It is recommended that once welding has been completed, re-established the pre-heat for 2-3 hours, with a slow cool to room temperature. Temper at 1050˚F for two hours. An increase of 1-2 points in hardness can be realized with a second temper 30⁰F below the first.
SMAW - AC/DC+
FCAW - DC+ / 92% Ar/8CO2
DC+ - Neutral Flux
Technical Data
- Class - Hot Work Die Steel CrCoMoW
- Hardness: AWRC with ttemper 42-58 & WHRC with temper 47-60
- Tensile: Up to 300 ksi
- Machinability: Tough, use carbide tools
