Product introduction
◆ Standards
GB/T 2518-2019 : DX51D+Z, DX51D+ZF, DX51D+ZA, DX51D+AZ
EN 10346:2015 : DX51D
JIS G 3302:2012 : SGCC, SGHC
ASTM A653M-17 : CS Type C
◆ Properties
Chemical properties:
| dx51d material properties | ||||||
| Grade | Chemical composition (mass fraction)/%, ≤ | |||||
| C | Si | Mn | P | S | Ti | |
DX51D+Z DX51D+ZF DX51D+ZA DX51D+AZ | 0.18 | 0.50 | 1.20 | 0.12 | 0.045 | 0.30 |
Mechancal properties:
| dx51d material properties | |||||
| Grade | Lower yield strength ReL/MPa | Tensile strength Rm/MPa | Elongation after break A80mm/% | Plastic strain ratio r90 | Transverse Tensile Strain Hardening Exponent n90 |
DX51D+Z DX51D+ZF DX51D+ZA DX51D+AZ | - | 270~500 | ≥22 | - | - |
Coating properties:
| dx51d material properties | |||||
| Type of coating | Density d/(g/cm3) | Coating form | Recommended Nominal Coating Weight/(g/m2) | Coating Code | |
| type | code name | ||||
| Pure zinc coating | Z | 7.1 | Equal thickness plating | 60 80 100 120 150 180 200 220 250 275 350 450 600 | 60 80 100 120 150 180 200 220 250 275 350 450 600 |
| Different thickness plating | 30/40 40/60 40/100 | 30/40 40/60 40/100 | |||
| Zinc-iron alloy coating | ZF | 7.1 | Equal thickness plating | 60 90 120 140 | 60 90 120 140 |
| Zinc-aluminum alloy coating | ZA | 6.6 | Equal thickness plating | 60 80 100 120 150 180 200 220 250 275 300 | 60 80 100 120 150 180 200 220 250 275 300 |
| Al-Zn Alloy Coating | AZ | 3.8 | Equal thickness plating | 60 80 100 120 150 180 200 | 60 80 100 120 150 180 200 |
◆ Application
DX51D galvanized steel sheet consists of five parts: product use code, steel type code, steel properties, hot-dip code (D) and coating type code, among which hot-dip code (D) and coating code are connected by "+".
DX of DX51D: the first letter D indicates flat steel for cold forming; the second letter X indicates that the rolling state of the substrate is not specified.
The steel grade characteristic of DX51D galvanized steel sheet is low carbon steel.
DX51D+Z: It is one of the most commonly used coating types in manufacturing and construction.
DX51D+ZF: Suitable for exterior parts such as automobiles and home appliances.
DX51D+ZA: Primarily used in applications where good ductility is required (eg deep drawn parts) and where moderate corrosion resistance is required.
DX51D+AZ: Suitable for environments requiring high corrosion resistance, high temperature resistance and heat reflectivity, such as roofs and walls.
