is 55% Al-Zn alloy coated steel processed in Continuous Galvanizing Line, the unique coating gives the steel greater protection from the corrosion, typically used for the roll-forming process e.g : Roofing, Cladding, and other structural products.

Technical Data
Standard Reference :
AS 1397 for product & AS 1365 for dimension
Other Standard :
AS 1397, MS 1196:2000, ASTM A-792, ISO 9364, IS 15961, EN 10346:2015, TISI 2228-2259, JIS G-3321
Chemical Composition Of Steel Base
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
Chemical Composition Of Steel Base
Physical Properties Range
Base Metal Thickness, mm 0.25 - 2.50
Strip width, mm 600-1250
Coating weight, gr/m2 150-200
Steel Grade G250, G300, G350, G450, G500, G550
Guaranteed Properties Of Steel
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 - -
Other grade available upon request
Note :
- Tensile tested in longitudinal rolling direction, bending tested in transverse rolling direction.
- Yield Strength & Tensile Strength guaranteed for thickness > 0.40 mm, Elongation guranteed for thickness > 0.60 mm.
Dimension Tolerance & Capabilities
Thickness Tolerance
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
Width Tolerance
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
Standard product is 914 mm, 1100 mm & 1219 mm, other sizes may be available upon request