GB/T 22641-2020 Wrought aluminium alloy sheets and plates for ships
1. Scope
This standard specifies the requirements, test methods, inspection rules, marking, packing, transporting, storing, quality certificate and the order (or contract) information of wrought aluminium alloy sheets and plates for ships.
This standard is applicable to wrought aluminium alloy sheets and plates for ships
.（hereafter referred to ‘Sheets and Plates’）.
2. Normative references
The following referenced documents are indispensable for the application 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.
GB/T 232 Metallic material —— Bending test methods
GB/T 3190 Wrought aluminium and aluminium alloys – Chemical composition
GB/T 3199 Aluminium and aluminium alloy products – Packing, marking, transporting and storing
GB/T 3246.1 Inspection method for structure of wrought aluminium and aluminium alloy products---Part 1: Inspection method for microstructure
GB/T 3246.2 Inspection method for structure of wrought aluminium and aluminium alloy products---Part 1: Inspection method for macrostructure
GB/T 3880.1 Wrought aluminium and aluminium alloy plates，sheets and strips for general engineering━part 1: Technical conditions of delivery
GB/T 3880.3-2012 Wrought aluminium and aluminium alloy plates，sheets and strips for general engineering━part 3: Dimension Tolerances
GB/T 6519 Ultrasonic inspection of wrought aluminium and magnesium alloy products
GB/T 7999 Optical emission spectrometric analysis method of aluminium and aluminium alloys
GB/T 16865 Test pieces and method for tensile test for wrought aluminium and magnesium alloys products
GB/T 17432 Methods for sampling for analyzing the chemical composition of wrought aluminum and aluminum alloys
GB/T 20975 (All parts) Chemical analysis method of aluminium and aluminium alloys
GB/T 22639 Test method of exfoliation corrosion for wrought aluminium and aluminium alloys
GB/T 26491 Determination of intergranular corrosion of 5xxxseries aluminum alloys by mass loss
YS/T 590 wrought aluminium and aluminium alloys rectangle ingots
YS/T 600 Analysis method of hydrogen in liquid aluminum and aluminum alloysa, the method of the closed gas loop circulation
3. Requirements
3.1 Product Classification
3.1.1 Alloy,temper and dimension:
Alloy designation, supplied temper and thickness of sheets and plates shall be as shown in Table 1 ,and width and length corresponding to thickness shall be as specified in Table 2.
Table 1 Alloy, supplied temper and thickness
