Steel Technological

galvanized steel grades and technical requirements

galvanized steel grades and technical requirements
1, galvanized steel sheet and strip grades naming
Common brands are DX51D + Z, DX52D + Z, DC51D + Z, DC52D + Z, S350GD + Z and so on. Galvanized steel or steel grades by product uses code, steel grade code, characteristic steel, hot dip galvanized code (D), +, plating general category code five parts, specific grades are named as follows:
A) cold forming of galvanized sheet:
Grade Example: DX51D + Z (or ZF \ AZ), DC51D + Z (or ZF \ AZ), DD52D + Z (or ZF \ AZ)
DX: The first letter D flat steel for cold forming, if the second letter is X, rolling state represents a substrate not specified; if the second letter is C, on behalf of the substrate is defined as cold-rolled substrate; a second place If the letter is D, the representative of the substrate is defined as hot rolled substrate;
51 to 57: two numbers indicate the number of steel grade;
After a two digit code D is hot dip galvanized;
Z represents a pure zinc coating, ZF indicates Galvanized iron alloy, AZ expressed galvanized.
So: DX51D + Z says that the product uses for cold forming, flat steel, unspecified state board, the serial number of steel grade 51, the pure zinc coating, hot-dip products.
    B) Other brands named example galvanized
       S350GD + Z: S is expressed as structural steel, 350 represents a specified minimum yield strength of 350Mpa, G represents steel properties are not specified, D represents galvanized, + Z expressed as zinc plating.
       HX340LAD + ZF: that the product uses for cold forming high strength flat steel, does not require the state board, the specified minimum yield strength of 340Mpa, steel types of high-strength low-alloy steel, zinc-iron alloy plating, hot dip products.
       HC340 / 590DPD + Z: that the product uses for cold forming, high-strength flat steel, cold-rolled substrate, the substrate is specified, the specified minimum yield strength is 340Mpa, the specified minimum tensile strength of 590Mpa, steel types of duplex steel, pure zinc hot dip coating products.
    2, galvanized steel sheet and strip steel grades and characteristics are shown in Table 2
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