ISO 657 Hot-rolled steel sections

It is an ISO

International Organization for Standardization

The International Organization for Standardization , widely known as ISO, is an international standard-setting body composed of representatives from various national standards organizations. Founded on February 23, 1947, the organization promulgates worldwide proprietary, industrial and commercial...

 standard

Standardization

Standardization is the process of developing and implementing technical standards.The goals of standardization can be to help with independence of single suppliers , compatibility, interoperability, safety, repeatability, or quality....

 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 revision

Modifications (genetics)

In opposition to mutations, modifications are included in the band width of the genome of an individual creature. Modifications are dependent on the plentifulness of the substrate, light, warmths, stress, training, and so on....

 of 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