Nearly one third of the globally produced structural flat and long structural products are in the 0.11 to 0.16% carbon range. By definition, numerous steelmakers globally define this approximate carbon range as peritectic in their melting grade family within their organization. The metallurgical consequence is the result of numerous global structural specifications which allow carbon to wide carbon ranges resulting in quality issues. For example, such specifications as ASTM A588 set no minimum and a 0.15 to 0.20%C maximum depending on the specific grade. This peritectic region is specifically challenging because of solidification issues and a higher propensity for slab or billet cracking during continuous casting. The relative steelmaking operational cost of production is compared between peritectic and non-peritectic carbon compositions for a given specification.
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