Development of covered electrodes for welding HSLA-100 steel
HSLA-100 steel is a low-carbon, copper-precipitation-strengthened steel developed by the U.S. Navy as a replacement for HY-100 steel. HSLA-100 has excellent resistance to hydrogen cracking, offering the potential for dramatic savings in fabrication costs through reduction or elimination of preheat and postheat requirements. Unfortunately, s the cracking-resistance of the base metal has improved, the weld metal crack susceptibility has become the primary concern. The objective of the present study is to develop covered electrodes for shielded metal arc welding (SMAW) of HSLA-100. This paper presents the mechanical property evaluation phase of this program. A series of test weldments were fabricated in 3/4-in. thick HSLA-100 plate under nominally constant conditions. The alloy selected for evaluation was a low carbon, Ni-Mn-Mo-Ti system. Results showed that mechanical property goals were achieved with the low-carbon, Ni,Mo-Ti design. Manganese and molybdenum were found to be potent strengtheners and were able to compensate for the reduced carbon and chromium. Nickel also provided effective strengthening. The influence of alloying of impact toughness was complex. In general, increasing nickel decreased upper shelf and CVN transition temperature. Maganese and titanium appeared to generally have a positive effect on impact toughness. The influence of molybdenum was dependent on the level of nickel present.
- OSTI ID:
- 115476
- Report Number(s):
- CONF-9404233-; TRN: 95:002927-0054
- Resource Relation:
- Conference: 75. American Welding Society (AWS) annual meeting, Philadelphia, PA (United States), 10-15 Apr 1994; Other Information: PBD: 1994; Related Information: Is Part Of 75th Diamond anniversary American Welding Society annual meeting; PB: 273 p.
- Country of Publication:
- United States
- Language:
- English
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