IS 14246:2013 specifies continuously hot-dip zinc coated (galvanized) steel sheets and coils for structural, roofing, and general engineering applications. Unlike IS 277 which focuses on formed roofing sheets, IS 14246 covers the coil form supplied to downstream processors — colour coaters, profilers, roll formers, and fabricators — making it the reference standard for galvanized coil trade in India.
Technical Overview
IS 14246 covers the full range of continuously galvanized coil — from light interior-grade coatings to heavy structural and outdoor grades. The standard specifies coating designation (Z-series), base metal mechanical properties, surface conditions, and dimensional tolerances. Products supplied under IS 14246 are tested for coating adherence, coating weight (triple-spot test), and surface appearance. The standard aligns with EN 10346 for coating designations, aiding specification comparison for export-oriented manufacturers. Most SAIL, JSPL, and JSW galvanized coils are certified to both IS 14246 and IS 277.
Grades & Mechanical Properties
| Grade | Notes |
|---|---|
| Z100 | Light interior coating |
| Z200 | General engineering, moderate outdoor |
| Z275 | Standard outdoor grade — most traded |
| Z350 / Z450 / Z600 | Heavy-duty outdoor and corrosive environments |
Values are minimum requirements unless otherwise stated. Always verify with the current edition of the standard and the mill test certificate.
Common Applications
- Substrate for colour-coated (PPGI) sheets
- Roll-formed roofing and wall cladding profiles
- Cold-formed structural sections (purlins, rails)
- HVAC duct fabrication
- Solar mounting structure profiles
- Automotive underbody and structural components
International Equivalents
EN 10346
European standard for continuously hot-dip coated steel — primary reference IS 14246 aligns with
ASTM A653
US galvanized sheet standard
IS 277:2018
Indian standard for finished galvanized roofing sheets (downstream product)
Frequently Asked Questions
What is IS 14246?
What is the difference between IS 14246 and IS 277?
Related Standards
IS 277:2018 — Galvanized Steel Sheets (Plain and Corrugated)
IS 277:2018 is the BIS specification for hot-dip galvanized steel sheets in plain (GP) and corrugated (GC) form. The standard defines zinc coating weight classes, dimensional requirements, and quality conditions for sheets used in roofing, wall cladding, agricultural buildings, and industrial enclosures. It is the most referenced standard for galvanized sheets in the Indian construction market.
View standard
IS 513:2008 — Cold Rolled Low Carbon Steel Sheets and Strips
IS 513:2008 is the Bureau of Indian Standards specification for cold rolled low carbon steel sheets and strips. It defines five grades (CR1 to CR5) based on formability — from commercial quality for general fabrication to ultra deep drawing quality for complex press-formed components. CR steel is characterised by its smooth surface finish, tighter dimensional tolerance, and superior formability compared to HR equivalents.
View standard
IS 1079:2017 — Hot Rolled Carbon Steel Sheet and Strip
IS 1079:2017 specifies hot rolled carbon steel sheets and strips for general engineering purposes. It defines four commercial grades — HR1 through HR4 — based on forming characteristics, covering thicknesses from 1.6mm to 10mm in sheet form and strips up to 600mm wide. It is the foundational standard for the hot rolled coil and sheet supply chain in India.
View standard