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ISO 657-1:2026Published

Hot-rolled steel sections — Dimensions, sectional properties and tolerances — Part 1: Angles, sloping flange channels and sloping flange beams

Profilés en acier laminés à chaud — Dimensions et caractéristiques rapportées aux axes — Partie 1: Cornières, profilés en U à ailes inclinées et poutrelles à ailes inclinées

Abstract / scope

This document specifies requirements for dimensions, sectional properties and tolerances for hot-rolled sections as follows:

  1. equal angle LE (L section);
  2. unequal angle LU (L section);
  3. sloping flange channel US (U section);
  4. sloping flange I beam IS(I section).

This document is used together with technical delivery conditions especially, but is not limited, ISO 630-1, ISO 630-2, ISO 630-3, ISO 630-5 and ISO 630-6.

Life cycle

Replaces

ISO 657-5:1976WithdrawnHot-rolled steel sections — Part 5: Equal-leg angles and unequal-leg angles — Tolerances for metric and inch seriesInternational Standard · Published 1 Nov 1976 · ISO/TC 17/SC 3ISO 657-11:1980WithdrawnHot-rolled steel sections — Part 11: Sloping flange channel sections (Metric series) — Dimensions and sectional propertiesInternational Standard · Published 1 Sep 1980 · ISO/TC 17/SC 3ISO 657-15:1980WithdrawnHot-rolled steel sections — Part 15: Sloping flange beam sections (Metric series) — Dimensions and sectional propertiesInternational Standard · Published 1 Sep 1980 · ISO/TC 17/SC 3ISO 657-2:1989WithdrawnHot-rolled steel sections — Part 2: Unequal-leg angles — DimensionsInternational Standard · Published 26 Jun 1989 · ISO/TC 17/SC 3ISO 657-1:1989WithdrawnHot-rolled steel sections — Part 1: Equal-leg angles — DimensionsInternational Standard · Published 13 Jul 1989 · ISO/TC 17/SC 3