Understand The Test Data, Import Good Quality of Color Coating Steel
2020年4月27日
In the purchase of color coating steel, how to ensure import good quality steel? This requires chemical and physical testing of each coil during and after production.If the test datum meet the quality requirements, that means we purchase good quality color coated steel. So what tests need to be done?
Color Coated Steel Test Items
| NO. | TEST ITEMS | CONDITION | RESULT |
| 1 | T-BEND TEST | 180°BENDING | 2~3T FOR BUILDING MATERIAL
≤1T FOR SPECIALLY BEND MATERIAL |
| 2 | PENCIL HARDNESS | USE PENCIL TIP TO TEST THE HARDNESS | ≥H |
| 3 | SALT SPRAY | 500Hr IN SALT CONDITION | NO CORROSION |
| 4 | IMPACT TEST | 80LN-LB | NO CRACK, NO PAINT PEELING |
| 5 | MEK RUB TEST | RUB BOTH SIDES BY CHEMICAL SOLUTIONS | ≥100TIMES ON TOP
≥50TIMES AT BOTTOM |
| 6 | GLOSS | AS PER REQUIREMENTS | 10% TOLERANCE |
| 7 | COLOR VARIATION | ASTM A755 | ≤δ0.7 |
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