Surface structure | Code No. | Features | Application |
---|---|---|---|
Conventional spangle | Z | Spangles condensated on zinc coating under normal conditions after galvanizing. | Commercial purposes |
Small spangle | X | Surface in spangles smaller than conventional ones and due to controlled condensation of zinc coating. | Applications where conventional spangles cannot meet the surface appearance requirements. |
Skin passed spangle | G | Surface structure after special skin pass treatment. | Applications of high surface quality requirements, such as color coating base plates. |
Skin passed small spangle | GX | - | - |
Zero spangle | N | No visible spangles on coating surface as a result of a special production process. | - |
Zn-Fe alloy | R | No spangle, gray, normally matter | Applicable to further painting |
Item | Description |
---|---|
Chromate treatment (L) | Chromate treatment is a chemical treatment with an aim to prevent white rusts formed on product surfaces during transportation and storage. |
Oiling (Y) | Oiling is to prevent white rusts formed on product surfaces during transportation and storage. |
Chromate treatment+ Oiling (LY) | Chromate treatment+ Oiling (LY) This treatment with oiling after surface chromate treatment is to further avoid the forming of white rusts. |
Grade | Chemical Composition.% Max | |||
---|---|---|---|---|
C | Mn | P | S | |
SGHC | 0.15 | 0.8 | 0.05 | 0.05 |
SGHC400 | 0.25 | 1.7 | 0.2 | 0.05 |
SGHC440 | 0.25 | 2 | 0.2 | 0.05 |
SGHC490 | 0.3 | 2 | 0.2 | 0.05 |
SGHC540 | 0.3 | 2.5 | 0.2 | 0.05 |
SGCC | 0.15 | 0.8 | 0.05 | 0.05 |
SGCH | 0.18 | 1.2 | 0.08 | 0.05 |
SGCD1 | 0.12 | 0.6 | 0.04 | 0.04 |
SGCD2 | 0.1 | 0.45 | 0.03 | 0.03 |
SGCD3 | 0.08 | 0.45 | 0.03 | 0.03 |
SGCD4 | 0.06 | 0.45 | 0.03 | 0.03 |
SGC340 | 0.25 | 1.7 | 0.2 | 0.05 |
SGC400 | 0.25 | 1.7 | 0.2 | 0.05 |
SGC440 | 0.25 | 2 | 0.2 | 0.05 |
SGC490 | 0.3 | 2 | 0.2 | 0.05 |
SGC570 | 0.3 | 2.5 | 0.2 | 0.05 |