T/TISA 003-2024 Continuous hot-dip aluminum-zinc alloy plated steel sheet and steel strip for high and low voltage switchgear

Scope

Main technical content: 1. Grade and chemical composition: This section stipulates that the grade and chemical composition (melt analysis) of the steel strip shall comply with the provisions of GB/T 2518 for DX51D+AZ, and further strict requirements for the composition shall be specified based on actual production and market conditions. The chemical composition (melt analysis) of the steel strip in this standard is compared with GB/T 2518, EN 10346, and JIS G3321 in Table 1. As can be seen from Table 1, the chemical composition (melt analysis) of the steel strip specified in this document is more stringent than those in GB/T 2518, EN 10346, and JIS G3321, in order to meet the production and processing requirements of high- and low-voltage switchgear. 2. Mechanical properties: The mechanical properties of the steel strip refer to GB/T 2518 and EN 10346. A comparison of this document with GB/T 2518 and EN 10346 is shown in Table 2. It can be seen from the table that the requirements in this document are more stringent than those in GB/T 2518 and EN 10346. 3. Regarding the adhesion of the coating: Based on the processing requirements of high- and low-voltage switchgear from downstream customers, detailed specifications for the adhesion test of the coating have been set forth. The diameter of the bend center for the coating adhesion test of the steel strip shall comply with the provisions in Table 3. The test samples can be taken horizontally or vertically. After the test, there shall be no coating peeling on the outer surface of the test samples, but cracks in the coating are allowed. Coating peeling within 5 mm from the edge of the test samples shall not be considered. If the supplier can guarantee this, the test may be omitted.

Development Information

Related Standards