WELDING METHODS FOR PRODUCING ULTRA-HIGH STRENGTH WELDMENTS WITH WELD METALS HAVING EXCELLENT CRYOGENIC TEMPERATURE FRACTURE TOUGHNESS

摘要

WELDING METHODS ARE PROVIDED FOR USE IN JOINING ULTRA-HIGH STRENGTH, LOW ALLOY STEELS TO PRODUCE WELDMENTS HAVING TENSILE STRENGTHS GREATER THAN ABOUT 900 MPA (130 KSI) WITH WELD METALS HAVING FRACTURE TOUGHNESS SUITABLE FOR CRYOGENIC APPLICATIONS ACCORDING TO KNOWN PRINCIPLES OF FRACTURE MECHANICS.