Semyon Vaynman, Morris E. Fine
Steel containing 0.03% carbon, 1.35% copper and 0.84% nickel exhibited yield strength in the range of 540-625 MPa, ultimate tensile strength ranging from 625 to 690 MPa, and 25-30% elongation when air cooled after hot rolling. This study aimed at developing a high strength weldable steel with adequate fracture toughness for bridge applications. The methodology involved investigating six laboratory heats produced via vacuum-induction melting and casting, followed by hot rolling and air cooling, at Northwestern University. The steel's composition was designed to enhance weldability while omitting expensive alloying elements. Results showed that no brittle heat-affected zone formed during both manual and automatic submerged arc welding without requiring pre-heating or post-heating. Additionally, the fracture toughness in both the plate and heat-affected zone was exceptional, with low carbon content maintaining good mechanical properties. This innovative approach demonstrated significant cost savings while fulfilling infrastructure needs without sacrificing performance.
@article{8de886eb-6dfb-4985-a34f-f3aff169ca89,
title={Copper Precipitation Hardened High Stren},
author={Semyon Vaynman and Morris E. Fine},
year={2026},
language={en}
}TY - JOUR TI - Copper Precipitation Hardened High Stren AU - Semyon Vaynman AU - Morris E. Fine PY - 2026 LA - en ER -
Mirjana Filipović, Željko Kamberović, Marija Korać
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