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is a product of Zinc coated steel plate through continuous hot dipping process previously passed through the annealing process (furnace) which can be set to enerate minimum tensile strength 270 Mpa up to 570 Mpa with coating thickness from 80 (Z08) to 600 (Z60) gram/m2.
Chemical Composition | G250 Max% | G300 G350 Max% | G450 G500 G550 Max% |
---|---|---|---|
Carbon - C | 0.12 | 0.30 | 0.20 |
Manganese - Mn | 0.50 | 1.60 | 1.20 |
Phosphorus - P | 0.040 | 0.040 | 0.040 |
Sulfur - S | 0.035 | 0.035 | 0.03 |
Physical Properties | Range |
---|---|
Base Metal Thickness, mm | 0.25 - 2.50 |
Strip width, mm | 600-1250 |
Coating weight, gr/m2 | 100-600 |
Steel Grade | G250, G300, G350, G450, G500, G550 |
Grade | Longitudinal Tensile Test | Transverse Band Test | |||
---|---|---|---|---|---|
Min Yield Strength | Min Tensile Strength | Min Elongation (Lo 50 mm) | Angle of Bend | Diameter of Mandrel in term of test piece thickness | |
Mpa | Mpa | % | t | degrees | |
G250 | 250 | 320 | 25 | 180 | 0 |
G300 | 300 | 340 | 20 | 180 | t |
G350 | 350 | 420 | 15 | 180 | 2t |
G450 | 450 | 480 | 10 | 90 | 4t |
G500 | 500 | 520 | 8 | 90 | 6t |
G550 | 550 | 550 | 2 | - | - |
Base Metal Thickness | Nominal Width < 1000 mm | Nominal Width 1000 to 1219 mm |
---|---|---|
0.25 ≤ T ≤ 0.30 | ± 0.02 | ± 0.02 |
0.30 < T ≤ 0.50 | ± 0.03 | ± 0.04 |
0.50 < T ≤ 0.80 | ± 0.04 | ± 0.05 |
0.80 < T ≤ 1.20 | ± 0.05 | ± 0.06 |
1.20 < T ≤ 1.60 | ± 0.06 | ± 0.07 |
1.60 < T ≤ 2.00 | ± 0.07 | ± 0.08 |
2.00 < T ≤ 2.50 | ± 0.08 | ± 0.09 |
Edge type | Width (W) mm | Tolerance Minus mm | Tolerance Plus mm |
---|---|---|---|
Mill Edge | W < 1000 | 0 | 4 |
1000 ≤ W ≤ 1250 | 0 | 5 | |
Slitted Edge | 30 ≤ W ≤ 150 | 0 | 0.40 |
150 < W ≤ 300 | 0 | 0.60 | |
300 < W ≤ 450 | 0 | 0.80 | |
450 ≤ W ≤ 600 | 0 | 1.00 | |
600 < W ≤ 750 | 0 | 1.00 |