Steel Plates & Sheets
Steel plate and sheet are flat-rolled steel products used as the base material for fabrication, structural connections, and vessel or tank construction, plate generally 6mm and thicker, sheet thinner and often coil-fed. NLS sources structural and pressure-quality plate to ASTM A283 and A572, and structural steel sheet to EN 10025-2, in mill or cut-to-size format against a fabrication drawing.
Steel plate and sheet are the flat starting material behind most fabricated steel, base plates, gusset plates, tank shells, ductwork, equipment skids, and any structure built by cutting, forming, or welding flat steel rather than assembling rolled sections. The line between plate and sheet is thickness: plate generally starts around 6mm and runs to well over 50mm for heavy structural or pressure-vessel work, while sheet covers thinner gauges, often supplied in coil and slit or cut to size.
NLS sources two main grade families for plate. ASTM A283 covers general-purpose carbon steel plate for structural and moderate-strength fabrication, the workhorse grade for base plates, gusset plates, and light equipment structures. ASTM A572 covers high-strength low-alloy plate, several strength grades in one specification, used where a lighter section needs to carry more load than A283 plate of the same thickness allows, common on heavier structural connections and crane or lifting-related fabrication. EN 10025-2 covers non-alloy structural steel including flat products, the reference where a project follows European material designations (S235, S275, S355) instead of ASTM grades. NLS supplies both hot-rolled and, where specified, cold-rolled sheet finishes.
On Saudi projects, plate shows up as base plates and gusset plates on structural steel connections, stiffener and doubler plates on fabricated members, tank and bin shell material, and the flat stock behind custom brackets, skids, and equipment supports. Thickness and grade are usually called out on the fabrication drawing, since a plate that's under-graded for its stress case is a structural risk even if it looks the same as the correct one.
NLS quotes plate and sheet against thickness, grade, and dimensions (mill sheet size or cut-to-size list), and returns a priced quote in USD. Standard A283 plate in common thicknesses typically sources faster than A572 high-strength grades or thick pressure-quality plate, which more often runs on a mill or stockist lead time confirmed at quote stage.
Specifications
- ✓Thickness range: plate from ~6mm to 50mm+, sheet in thinner gauges, coil or cut-to-size
- ✓Grades: ASTM A283 (general-purpose carbon steel), ASTM A572 (high-strength low-alloy)
- ✓European equivalent: EN 10025-2 (S235, S275, S355 designations)
- ✓Finish: hot-rolled standard, cold-rolled sheet where specified
- ✓Format: mill sheet sizes or cut-to-size per fabrication drawing
- ✓Typical use: base plates, gusset plates, tank and bin shells, equipment skids
Frequently Asked Questions
What's the difference between steel plate and steel sheet?+
The line is thickness. Plate generally starts around 6mm and can run well past 50mm for heavy structural or pressure work, while sheet covers thinner gauges and is often supplied in coil before being slit or cut to size.
When does a project need A572 plate instead of A283?+
A572 is a higher-strength low-alloy grade, specified when a design needs more load capacity from a thinner or lighter plate than A283 can deliver at the same thickness. The structural drawing or plate schedule will call out which grade applies.
Can NLS supply plate cut to a fabrication drawing rather than standard mill sheets?+
Yes. Plate and sheet can be quoted as standard mill sizes or cut to a dimensioned list from the fabrication drawing, which is the more common request on structural and equipment fabrication jobs.