Steel Plate Weight

Steel plates are flat rectangular sections of structural steel produced by hot-rolling at thicknesses 5-100+ mm. Per IS 2062:2011, steel plates are graded by yield strength (Fe-410, Fe-490, Fe-540, Fe-590) and through-thickness Z-quality for welded applications. Used for: gusset plates, end plates, base plates, cover plates, stiffeners, plate-girder webs and flanges, and architectural cladding. Major Indian plate suppliers: SAIL, JSW, JSPL, Tata Steel, ESSAR, ArcelorMittal Nippon Steel.

Standard plate dimensions: thicknesses 5, 6, 8, 10, 12, 16, 20, 25, 32, 40, 50, 63, 75, 100 mm; widths 1000-3000 mm; lengths 4000-12000 mm. For plates >25 mm thick used in heavy welded connections, IS 2062 mandates through-thickness Z-quality (Z15, Z25, or Z35) to prevent lamellar tearing during welding. Z25 = 25% reduction of area through-thickness in tensile test. Cost premium for Z-quality: 5-15%; essential for plate-girder bridges, welded box girders, and heavy industrial structures. The most-overlooked plate quality issue: through-thickness Z-quality. Many Indian residential and small commercial projects use plates without specified Z-quality; risk of lamellar tearing in heavy welded connections.