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This article presents in-depth metallurgical information about the response of carbon and low-alloy steels to welding conditions and micro-structural evolution in the weld heat-affected zone. It discusses the fabrication weldability and service weldability of carbon and low-alloy steels. The article describes six general classes of the metal: low-carbon steels, high-strength low-alloy steels, quenched-and-tempered steels, heat-treatable low-alloy steels, thermal-mechanical-controlled processing steels, and chromium-molybdenum steels. It concludes with an illustration of steels' susceptibility to hydrogen-assisted cold cracking relative to carbon content and carbon equivalent.

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Bruce R. Somers, Introduction to the Selection of Carbon and Low-Alloy Steels, Welding, Brazing and Soldering, Vol 6, ASM Handbook, Edited By David LeRoy Olson, Thomas A. Siewert, Stephen Liu, Glen R. Edwards, ASM International, 1993, p 405–407,

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