Z120 (120 g/m² zinc coating) is India's most widely used GP grade — perfect for roofing, ducting, and industrial enclosures. Available from stock in all thicknesses and widths.
Get Live Price →GP 120 GSM refers to a Galvanised Plain sheet with a zinc coating weight of 120 grams per square metre (on both sides combined). This means each side carries approximately 60 g/m² of zinc, providing a solid barrier against corrosion.
The Z120 grade sits in the sweet spot between cost and corrosion protection, making it the default choice for most Indian applications:
| Parameter | Specification |
|---|---|
| Zinc Coating | 120 g/m² (both sides combined) |
| Standard | IS 277:2008 |
| Base Metal | Cold Rolled steel (CQ/DQ grade) |
| Thickness Range | 0.18 mm – 2.0 mm |
| Width Range | 600 mm – 1500 mm |
| Surface | Regular Spangle / Zero Spangle |
| Passivation | Chromated or Chemical treatment |
| HSN Code | 7210 |
| Grade | Zinc (g/m²) | Life (Normal) | Price vs Z120 |
|---|---|---|---|
| Z80 | 80 | 8–12 years | ₹1,500 less |
| Z120 | 120 | 15–20 years | Base |
| Z180 | 180 | 25–30 years | ₹2,500 more |
| Z275 | 275 | 35+ years | ₹7,000 more |
GSM stands for grams per square metre. GP 120 GSM means the total zinc coating on both sides of the sheet weighs 120 grams per square metre. This is approximately 8.5 microns of zinc on each side.
Yes! Z120 is the most commonly used grade for roofing sheets in India. In normal (non-coastal, non-industrial) environments, it provides 15–20 years of corrosion-free service life.
Current price is approximately ₹70–74 per kg (₹70,000–74,000 per metric tonne) ex-Faridabad, exclusive of 18% GST. Check our website for real-time updated pricing.