ISO 657-1 Hot-rolled sections: angles, sloping flange channels and beams

Is ISO 657-1 still current?

Yes. ISO 657-1:2026 is the latest edition MechAtlas found (MechAtlas review: 27 October 2026). Check the publisher for amendments before you specify it.

What it covers

Dimensions, section properties and tolerances of equal and unequal angles, sloping flange channels and I beams.

Parts that use ISO 657-1

• I-beam (taper flange) (ISO / EN, main)
  Hot-rolled I-shaped beam with sloping (taper) inner flange faces, used for general frames, supports and runway beams.
  Sloping flange I beams, channels and angles; 2026 edition.
• Channel (C / U section) (ISO / EN, main)
  Hot-rolled U-shaped section used for frames, purlins, bracing, conveyor stringers and platforms.
  Includes sloping flange channels.
• Equal and unequal angle (ISO / EN, main)
  Hot-rolled L-shaped section used for bracing, frames, supports, cleats and edge protection.
  Equal (LE) and unequal (LU) angles; 2026 edition.

Official source

MechAtlas does not reproduce standards. Check the official edition at the publisher's page for ISO 657-1 or the ISO store.

Other steel grades & sections standards

• EN 10277 Replaced
  Bright steel products
• IS 2062 Replaced
  Hot-rolled structural steel
• DIN 1025-2 Withdrawn
  Wide flange I-beams (IPB / HEB series)
• IS 12778 Withdrawn
  Parallel flange beams, columns and bearing piles
• EN 10210-1 / 10219-1 Changing
  Hot-finished / cold-formed hollow sections
• ASTM A105/A105M Current
  Carbon steel piping forgings
• ASTM A108 Current
  Cold-finished carbon and alloy steel bars
• ASTM A1085 Current
  Cold-formed welded carbon steel HSS
• ASTM A240/A240M Current
  Stainless plate, sheet & strip
• ASTM A29 Current
  General requirements for hot-wrought steel bars
• ASTM A36/A36M Current
  Carbon structural steel
• ASTM A572 / A992 / A500 / A514 Current
  HSLA, W-shapes, HSS, Q&T plate

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