SPOT WELD STRENGTHS ON MATERIAL - ALLOY STEEL ULTRA-HIGH STRENGTH 'HALMO' (CRUCIBLE STEEL CO.).
Abstract
Resistance spot welds were made with 0.050 inch thick Halmo, a 0.35% carbon, 5% chromium, 5% molybdenum hot-work die steel. After heat treatment consisting of heating at 1950 F for 1 hour, air cooling and double tempering at 1050 F for 2 hours, the materials' mechanical properties were: ultimate strength, 265.5 ksi; yield strength, 225.4 ksi, and elongation, 3% in 2 in. Several sequence combinations of heat treatment and welding were tried to obtain tensile-shear strengths comparable with Mil-W6858 values for non-hardenable stainless steel, but only welding in the heat treated condition followed by tempering in the spot welding machine was successful in producing weld strengths comparable to those in Mil-W-6858. Under the above welding conditions, average weld strengths of 1918 lbs. in tensile-shear and 234 lbs. in cross-tension were attained. The cross-tension to tension-shear ratio was 0.12. (A thor)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 04, 1958
- Accession Number
- AD0290656
Entities
People
- A. Giuntoli
- H. C. Turner
- P. W. Bergstedt
Organizations
- General Dynamics