WELDABILITY OF 18NI-9CO-5MO MARAGING STEEL SHEET,
Abstract
Results of a weldability study on 18Ni-9Co-5Mo maraging steel sheet are presented. The alloy is easily welded in either the annealed or the heat treated condition. Sound TIG welds can be produced without benefit or preheat or postheat. Simple aging treatments resulted in ultimate strengths ranging from 240 KSI to 319 KSI. Increasing the Ti content in the weld metal improved the weld strength. The maraging steel is less susceptible to hot-cracking than 4340 steel. The room temperature net-fracture strength was evaluated by the shallow-crack criterion. The effect of Ti content on the net fracture strength of the weld deposit was studied. The critical crack depth of 0.015 inches is similar for all levels of Ti. The net fracture strength decreased more rapidly in the higher Ti welds, after the critical crack depth is exceeded, than in relatively low Ti welds. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 16, 1964
- Accession Number
- AD0437108
Entities
People
- M. M. Mabry
Organizations
- Douglas