Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section (B21B17/00 - B21B23/00 take precedence; with respect to composition of material to be rolled B21B3/00; extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B5/00; metal-rolling stands as units B21B13/00; continuous casting into moulds having walls formed by moving rolls B22D11/06); Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations

Child Classifications

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• B21B 1/02 for rolling heavy work, e.g. ingots, slabs, billets, in which the cross-sectional form is unimportant
• B21B 1/08 for rolling work of special cross-section, e.g. angle steel (rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects B21H8/00)
• B21B 1/16 for rolling wire or material of like small cross-section
• B21B 1/22 for rolling bands or sheets of indefinite length (B21B1/42 takes precedence)
• B21B 1/38 for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, (B21B1/40 takes precedence; folding sheets before, or separating layers after, rolling B21B47/00)
• B21B 1/40 for rolling foils which present special problems, e.g. because of thinness
• B21B 1/42 for step-by-step or planetary rolling (making tubes by pilgrim-step rolling B21B21/00)
• B21B 1/46 for rolling metal immediately subsequent to continuous casting (metal-rolling stands B21B13/22; continuous casting B22D11/00, e.g. into moulds with rolls B22D11/06)