ISO 4998:2023
Steel sheet, zinc‐coated and zinc‐iron alloy‐coated by the continuous hot‐dip process, of structural quality
This document specifies the requirements for steel sheet, zinc-coated and zinc-iron alloy-coated by the continuous hot-dip process, of structural quality.
The product is intended for applications where resistance to corrosion is of prime importance.
The steel sheet is produced in a number of grades, coating masses, ordering conditions, and surface treatments.
This document does not cover steel sheet designated as commercial quality, or drawing quality, which are covered in ISO 3575.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Dimensions
5 Conditions of manufacture
5.1 Steelmaking
5.2 Chemical composition
5.3 Chemical analysis
5.3.1 Heat analysis
5.3.2 Product analysis
5.4 Mechanical properties
5.5 Coating
5.5.1 Coating mass
5.5.2 Coating adherence
5.6 Weldability
5.7 Painting
5.8 Surface treatment
5.8.1 Mill passivation
5.8.2 Mill phosphating
5.8.3 Oiling
5.9 Dimensional and shape tolerances
6 Sampling
6.1 Chemical composition
6.2 Tensile test
6.3 Coating tests
6.3.1 Coating mass
6.3.2 Triple-spot test
6.3.3 Single-spot test
6.3.4 Coating adherence
7 Test methods
7.1 Tensile test
7.2 Coating properties
7.2.1 Coating mass
7.2.2 Coating adherence
8 Designation system
8.1 General
8.2 Coating type
8.3 Coating mass
8.4 Coating finish condition
8.5 Surface treatment
8.6 Example
9 Retests
9.1 Machining and flaws
9.2 Elongation
9.3 Additional tests
10 Resubmission
11 Workmanship
12 Inspection and acceptance
13 Coil size
14 Marking
15 Information supplied by the purchaser
Annex A (normative) Orders requiring base-metal thickness
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Dimensions
5 Conditions of manufacture
5.1 Steelmaking
5.2 Chemical composition
5.3 Chemical analysis
5.3.1 Heat analysis
5.3.2 Product analysis
5.4 Mechanical properties
5.5 Coating
5.5.1 Coating mass
5.5.2 Coating adherence
5.6 Weldability
5.7 Painting
5.8 Surface treatment
5.8.1 Mill passivation
5.8.2 Mill phosphating
5.8.3 Oiling
5.9 Dimensional and shape tolerances
6 Sampling
6.1 Chemical composition
6.2 Tensile test
6.3 Coating tests
6.3.1 Coating mass
6.3.2 Triple-spot test
6.3.3 Single-spot test
6.3.4 Coating adherence
7 Test methods
7.1 Tensile test
7.2 Coating properties
7.2.1 Coating mass
7.2.2 Coating adherence
8 Designation system
8.1 General
8.2 Coating type
8.3 Coating mass
8.4 Coating finish condition
8.5 Surface treatment
8.6 Example
9 Retests
9.1 Machining and flaws
9.2 Elongation
9.3 Additional tests
10 Resubmission
11 Workmanship
12 Inspection and acceptance
13 Coil size
14 Marking
15 Information supplied by the purchaser
Annex A (normative) Orders requiring base-metal thickness
Bibliography