ISO 657 (Hot-rolled steel sections) is an International Organization for Standardization, ISO Standardization, standard that specifies the tolerances for hot-finished circular, square and rectangular structural hollow sections and gives the dimensions and sectional properties for a range of standard sizes. This first edition as an International Standard constitutes a technical Modifications (genetics), revision of International Organization for Standardization, ISO Recommendation R 657-1:1968. ISO 657 consists of 21 parts integrating any shapes of sections. ISO 657-1 specifies dimensions of hot-rolled equal-leg angles.

Amendments

*ISO 657-2:1989 *ISO 657-5:1976 *ISO 657-11:1980 *ISO 657-14:2000 **Revisions ***ISO/DIS 12633-2 ***ISO 657-14:1982 *ISO 657-15:1980 *ISO 657-16:1980 *ISO 657-18:1980 *ISO 657-19:1980 *ISO 657-21:1983

References

ISO Catalogue in the ISO website
ISO standards, #00657 {{standard-stub