ISO 7452:2013 PDF

Hot-rolled steel plates — Tolerances on dimensions and shape

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Title (English):

ISO 7452:2013

Hot-rolled steel plates — Tolerances on dimensions and shape

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 14
Publication date:: January 8, 2013
Edition:: ISO IS 7452 edition 3 version 1
ICS:: 77.140.50

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Description (English):

ISO 7452:2013 specifies requirements for tolerances for hot-rolled steel plates made on a reversing mill with the following characteristics: nominal thickness: 3 mm ≤ t ≤ 400 mm; nominal width: w ≥ 600 mm. ISO 7452:2013 does not apply to stainless steel. ISO 7452:2013 does not include continuous mill products, custom-made plate, checker plate or bulb plate for flooring or wide flats.

Technical details

Technical committee: ISO/TC 17/SC 3 - Steels for structural purposes
SKU: ISO 7452:2013

Abstract

Overview

ISO 7452:2013 - Hot-rolled steel plates - Tolerances on dimensions and shape - defines dimensional and shape tolerances for hot-rolled steel plates produced on a reversing mill. The standard applies to plates with nominal thickness 3 mm ≤ t ≤ 400 mm and nominal width ≥ 600 mm. It excludes stainless steel, continuous mill products, custom-made plate, checker plate, and bulb plate for flooring or wide flats.

Key topics and technical requirements

Scope and ordering information
- Purchaser must specify product description, selection of Annex A or B, nominal thickness/width/length, and tolerance classes (thickness, width, length, flatness).
- Several options exist (trimmed vs untrimmed edges (NK), limited camber/out-of-squareness (G), special flatness (S)) and must be agreed at order.
Tolerances on dimensions
- Thickness: multiple classes (A, B, C, D) - Class A varies with nominal thickness; Class B and C provide fixed minus tolerances; Class D gives symmetrical tolerances. Detailed values are in Annex A (Table A.1) and Annex B.
- Width and length: tolerance tables provided (Annex A Tables A.2 and A.3, Annex B equivalents).
Tolerances on shape
- Edge camber (q) and out‑of‑squareness (u) limits ensure a rectangle of ordered dimensions can be inscribed within the delivered plate.
- Flatness: normal (N) and special (S) flatness classes with measuring lengths of 1 000 mm, 2 000 mm or 4 000 mm. Wave pitch, measuring locations, and exclusion thresholds (deviations ≤ 2 mm not considered a wave) are specified.
Measurement procedures
- Measurements at ambient temperature.
- Thickness measured at points >25 mm from edges (unless untrimmed edges agreed otherwise).
- Flatness measured with straight edges; measuring points ≥25 mm from longitudinal edges and ≥200 mm (normal) or ≥100 mm (special) from plate ends.

Applications and practical value

Ensures consistent quality and interchangeability of hot‑rolled steel plates for:
- Structural steel fabrication and construction
- Heavy fabrication, shipbuilding, pressure parts (where applicable grades are specified)
- Plate suppliers, mills and quality control laboratories enforcing dimensional acceptance criteria
Helps purchasers and manufacturers agree unambiguous delivery requirements and inspection methods at the time of order.

Who uses ISO 7452

Steel mills and plate manufacturers (reversing mill production)
Procurement teams and purchasers specifying plate tolerances
Quality inspectors and metrology labs performing acceptance checks
Fabricators, structural engineers and project managers integrating plate tolerances into design and fabrication planning

Related standards

ISO 630 and ISO 9328 series (steel grade references)
ISO 683-1, -2, -10, -11 (steels)
ISO 6929 (steel products - vocabulary)
Note: continuous mill flat-rolled products and steel tubes are covered by other ISO technical committees (ISO/TC 17/SC 12; ISO/TC 5/SC 1).

Keywords: ISO 7452, hot-rolled steel plates, tolerances, thickness tolerances, flatness, edge camber, out-of-squareness, reversing mill.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope and ordering information
- Purchaser must specify product description, selection of Annex A or B, nominal thickness/width/length, and tolerance classes (thickness, width, length, flatness).
- Several options exist (trimmed vs untrimmed edges (NK), limited camber/out-of-squareness (G), special flatness (S)) and must be agreed at order.
Tolerances on dimensions
- Thickness: multiple classes (A, B, C, D) - Class A varies with nominal thickness; Class B and C provide fixed minus tolerances; Class D gives symmetrical tolerances. Detailed values are in Annex A (Table A.1) and Annex B.
- Width and length: tolerance tables provided (Annex A Tables A.2 and A.3, Annex B equivalents).
Tolerances on shape
- Edge camber (q) and out‑of‑squareness (u) limits ensure a rectangle of ordered dimensions can be inscribed within the delivered plate.
- Flatness: normal (N) and special (S) flatness classes with measuring lengths of 1 000 mm, 2 000 mm or 4 000 mm. Wave pitch, measuring locations, and exclusion thresholds (deviations ≤ 2 mm not considered a wave) are specified.
Measurement procedures
- Measurements at ambient temperature.
- Thickness measured at points >25 mm from edges (unless untrimmed edges agreed otherwise).
- Flatness measured with straight edges; measuring points ≥25 mm from longitudinal edges and ≥200 mm (normal) or ≥100 mm (special) from plate ends.

Applications and practical value

Ensures consistent quality and interchangeability of hot‑rolled steel plates for:
- Structural steel fabrication and construction
- Heavy fabrication, shipbuilding, pressure parts (where applicable grades are specified)
- Plate suppliers, mills and quality control laboratories enforcing dimensional acceptance criteria
Helps purchasers and manufacturers agree unambiguous delivery requirements and inspection methods at the time of order.

Who uses ISO 7452

Steel mills and plate manufacturers (reversing mill production)
Procurement teams and purchasers specifying plate tolerances
Quality inspectors and metrology labs performing acceptance checks
Fabricators, structural engineers and project managers integrating plate tolerances into design and fabrication planning

Related standards

ISO 630 and ISO 9328 series (steel grade references)
ISO 683-1, -2, -10, -11 (steels)
ISO 6929 (steel products - vocabulary)
Note: continuous mill flat-rolled products and steel tubes are covered by other ISO technical committees (ISO/TC 17/SC 12; ISO/TC 5/SC 1).

Keywords: ISO 7452, hot-rolled steel plates, tolerances, thickness tolerances, flatness, edge camber, out-of-squareness, reversing mill.

ISO 7452:2013 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and practical value

Who uses ISO 7452

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and practical value

Who uses ISO 7452

Related standards

Related standards

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