| 摘要 |
This disclosure relates to a metallic composite article, i.e. ingot, slab, strip or sheet, having a thin stainless steel core sandwiched between two relatively thick low carbon or low alloy steel outer layers. The composite article is formed at the ingot stage by casting low carbon steel or low alloy steel simultaneously about a stainless steel plate suspended in a mold, which plate has had its major surfaces covered by a metallic protective layer so as to control the alloy depletion therefrom, especially the chromium to a value not less than about 11%, by weight. The resulting article exhibits excellent resistance to pitting and penetration in those corrosive environments where such phenomena are known to be a problem.
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