ISO 11772:2024

Hot-rolled longitudinally profiled steel plate

This document specifies requirements for hot-rolled longitudinally profiled steel plates (LP steel plates). This document applies to hot-rolled LP steel plates with thickness between 4 mm and 400 mm for general structural and engineering purposes.

Tôle d'acier profilée longitudinalement laminée à chaud

General Information

• Status: Published
• Publication Date: 23-May-2024
• ICS: 77.140.50 - Flat steel products and semi-products
• Technical Committee: ISO/TC 17/SC 3 - Steels for structural purposes
• Drafting Committee: ISO/TC 17/SC 3 - Steels for structural purposes
• Current Stage: 6060 - International Standard published
• Start Date: 24-May-2024
• Due Date: 17-Mar-2025
• Completion Date: 24-May-2024

Overview

ISO 11772:2024 - Hot-rolled longitudinally profiled steel plate - defines requirements for hot-rolled longitudinally profiled (LP) steel plates used for general structural and engineering purposes. The standard applies to LP steel plates with thicknesses from 4 mm to 400 mm, covering product designation, dimensions, tolerances, technical delivery conditions and inspection/test methods for plates that have regular changes in thickness along the rolling (longitudinal) direction.

Key topics

• Scope & classification
  • Covers LP steel plates (types 01–10 are illustrated), including equal-thickness and variable-thickness sections.
  • Typical designation format: [steel grade]-LP[type] (example: S235-LP01).
• Dimensions & identification
  • Identification methods include nominal thickness × width × length or thickness/slope × width × length for commonly used types.
  • Annex A lists applicable dimensions; Annex B gives methods for nominal-dimension calculation for variable-thickness sections.
• Tolerances & shape
  • Thickness and dimensional tolerances conform to ISO 7452 Class D; flatness tolerances to ISO 7452 Class N.
  • Edge camber, out-of-squareness and width/length tolerances also reference ISO 7452.
• Technical requirements
  • Chemical composition and delivery conditions reference the ISO 630 series (Parts 1–6) for structural steels.
  • Plates are delivered by calculated mass (calculation methods in Annex C).
  • Surface quality, internal soundness and mechanical properties are specified; internal soundness inspection uses appropriate ultrasonic methods.
• Inspection & test methods
  • Clause 9 details measurement and test methods for thickness, width, total length, flatness, edge camber, out-of-squareness, mass calculation and internal soundness.
• Purchaser information
  • Purchasers must specify reference to ISO 11772:2024, steel grade, delivery conditions, nominal dimensions/type, quantity, marking and special requirements.

Applications

ISO 11772:2024 is intended for:

• Structural and civil engineering elements requiring variable-thickness plates (bridges, building sections)
• Heavy engineering and machinery components where weight optimization or section profiling is needed
• Shipbuilding, offshore structures and fabricated assemblies that use profiled plates to improve performance or reduce weight

Who uses this standard

• Steel producers and plate mills fabricating hot-rolled LP plates
• Procurement and quality teams specifying and accepting plate deliveries
• Structural engineers, fabricators and inspectors responsible for material conformity and testing

Related standards

• ISO 630 series (structural steels)
• ISO 7452 (tolerances on dimensions and shape)
• ISO 7788 (surface finish)
• ISO 10474 (inspection documents)
• ISO 17577 (ultrasonic testing of steel flat products)

Keywords: ISO 11772:2024, longitudinally profiled steel plate, LP steel plate, hot-rolled, tolerances, dimensions, structural steel.

Standards Content (Sample)

International
Standard
ISO 11772
First edition
Hot-rolled longitudinally profiled
2024-05
steel plate
Tôle d'acier profilée longitudinalement laminée à chaud
Reference number
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
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or ISO’s member body in the country of the requester.
ISO copyright office
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Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification and designation . 2
4.1 Classification .2
4.2 Designation .4
4.3 Identification methods of LP steel plate .4
5 Information to be supplied by the purchaser . 5
6 Dimensions, shapes, mass and permissible tolerance . 5
6.1 Dimensions .5
6.2 Tolerances on dimensions .5
6.3 Tolerances on shape .5
6.3.1 Tolerance on flatness .5
6.3.2 Tolerances on edge camber to length (L) and out-of-squareness to length (L).5
6.4 Mass .6
7 Technical requirements . 6
7.1 Grades and chemical compositions .6
7.2 Delivery conditions . .6
7.3 Mechanical properties .6
7.4 Surface quality .6
7.5 Internal soundness .6
7.6 Others .6
8 Inspection . 6
9 Test methods . 7
9.1 Dimension measurement .7
9.1.1 Thickness .7
9.1.2 Width .7
9.1.3 Total length .7
9.1.4 Flatness .7
9.1.5 Edge camber .9
9.1.6 Out-of-squareness .9
9.2 Calculation of mass .9
9.3 Internal soundness .9
9.4 Others .9
10 Marking . .10
Annex A (informative) Applicable dimensions of LP steel plate to be supplied .11
Annex B (informative) Calculation method of nominal dimension for variable thickness section .13
Annex C (normative) Calculation methods of mass . 14
Bibliography .15

iii
Foreword
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iv
International Standard ISO 11772:2024(en)
Hot-rolled longitudinally profiled steel plate
1 Scope
This document specifies requirements for hot-rolled longitudinally profiled steel plates (LP steel plates).
This document applies to hot-rolled LP steel plates with thickness between 4 mm and 400 mm for general
structural and engineering purposes.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 630-1, Structural steels — Part 1: General technical delivery conditions for hot-rolled products
ISO 630-2, Structural steels — Part 2: Technical delivery conditions for structural steels for general purposes
ISO 630-3, Structural steels — Part 3: Technical delivery conditions for fine-grain structural steels
ISO 630-4, Structural steels — Part 4: Technical delivery conditions for high yield strength quenched and
tempered structural steel plates and wide flats
ISO 630-5, Structural steels — Part 5: Technical delivery conditions for structural steels with improved
atmospheric corrosion resistance
ISO 630-6, Structural steels — Part 6: Technical delivery conditions for seismic-proof improved structural steels
for building
ISO 7452, Hot-rolled steel plates — Tolerances on dimensions and shape
ISO 7788, Surface finish of hot-rolled plates and wide flats — Delivery requirements
ISO 10474, Steel and steel products — Inspection documents
ISO 17577, Steel — Ultrasonic testing of steel flat products of thickness equal to or greater than 6 mm
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
longitudinally profiled steel plates
LP steel plates
steel plates with regular changes in thickness along rolling direction (longitudinal direction)
3.2
equal thickness section
longitudinally profiled steel section with parallel upper and lower surfaces

3.3
variable thickness section
longitudinally profiled steel section with non-parallel upper and lower surfaces
3.4
slope
k
gradient of thickness between the two ends of variable thickness section
Note 1 to entry: The slope is calculated as
...