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Coated Product
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variety
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Steel grade
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standard/specification
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Purposes & LYS product characteristics
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Coated Product
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DX51D+AZ
DX52D+AZ
S220GD+AZ
S250GD+AZ
S280GD+AZ
CSTYPEB+AZ
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DIN EN10327
DIN EN10142
Q/OHAC905-2005
ASTM A 653M-05
Q/OHAC905
DIN EN10327
DIN EN10142
Q/OHAC905-2005
ASTM A 653M-05
Q/OHAC905
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It’s mainly used in household appliance and auto industry. There is little surface defect (zinc thickness fluctuation, silver, etc.) in the galvanized sheet, its surface quality can reach to S3 or higher. Its adhesion of zinc is good, formability is better than SGCC, meeting the requirements of household appliance and auto steel that need bending and drawing.
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Main performance index
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Inner standard of coated and drawing steel mechanical property
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grades
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Rp0.2
(MPa)
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Rm
(MPa)
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A80(%)≥
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0.25～0.5
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＞0.50～0.7
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＞0.7
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DX51D+Z
DX51D+AZ
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—
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≥270
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18
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20
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22
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DX52D+Z
DX52D+AZ
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140～300
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270～420
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22
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24
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26
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CSTYPEB
CSTYPEB+AZ
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205～380
245～410
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—
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20
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Inner standard of coated structural steel mechanical performance
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grades
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Rp0.2(MPa)≥
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Rm(MPa)≥
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A80(%)
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＜0.7
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0.7~2.0
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S250GD+AZ
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250
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330
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17
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19
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S280GD+AZ
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280
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360
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16
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18
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S320GD+AZ
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320
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390
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15
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17
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Inner standard of coating weight
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Standard
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Code
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Weight
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DIN EN 10327
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Z
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30、40、50、60、80、100、120、140、150、160、180、200、220、225、275
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AZ
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30、40、50、60、80、100、120、140、150
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DIN EN 10326
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AZ
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30、40、50、60、80、100、120、140、150
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ASTM A653M-05
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G
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30、40、60、90、100、115、140、165、185、210
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ASTM A792M-05
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AZM
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30、40、50、60、80、100、120、140、150
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Technical assurance of the key process
1. Substrate performance control technology;
2.Substrate shape and surface quality control technology;
3. Quality assurance of sheet surface cleaning;
4. Annealing furnace inner atmosphere control technology;
5. Accurate control technology of sheet temperature and liquid zinc temperature
6. Accurate control technology of coating thickness, coating weight and its uniformity
7.Sheet profile control technology;
8. Production process of chromate-free passivation and fingerprint resistant steel;
9. Production technology of heavy gauge coated steel.
