Steel Guides

GI Coating Classes Explained: Z120, Z180, Z275 and G90
Two GI coils can look identical on the truck and last completely different lengths of time on a roof. The difference is the zinc coating, and it is written in a short code on the mill certificate: Z120, Z275, G90. This page explains what those codes mean and which one to specify in the UAE. What the Z number means Under EN 10346, the European standard for continuously galvanized sheet and coil, the number after the Z is the minimum total zinc coating mass in grams per square metre, counting... Read more...
Steel Grades Explained: S275 vs S355 vs A36 vs SS400
S275, S355, A36, SS400. The same beam can arrive under four different grade names depending on which standard the mill rolled it to, and UAE projects specify all of them. This page explains what each one means, how they compare, and which one to ask for. What the grade name tells you For European grades the number is the minimum yield strength in N/mm² (MPa) for thinner material. S275 yields at 275 MPa, S355 at 355 MPa. The S simply means structural steel. The letters after it, JR, J0 or... Read more...
Steel Weight Chart for the UAE: kg per Metre and kg per Square Metre
Almost every steel enquiry in the UAE turns into a weight question sooner or later. You are quoted per tonne, you are delivered by the tonne, and your own cutting list is in metres and pieces. This page has the conversion tables and the formulas behind them, so you can work out a load without waiting for anyone to come back to you. The one number everything comes from Carbon steel has a density of 7.85 g/cm³, which is 7,850 kg per cubic metre. Every figure below comes from that... Read more...