Equilateral Triangle Steel Plates – Cut to Size

Flat equilateral triangle plates with three equal sides and 60° corners, plasma cut from 3, 4 or 5 mm mild steel, 304 or 316 stainless. Side lengths run from 100 mm to 600 mm.

At a glance

• Shape: equilateral triangle, no holes
• Side lengths: 100, 150, 200, 300, 400, 500 or 600 mm
• Thickness: 3 mm as standard, 4 mm and 5 mm cost more
• Material: mild steel, 304 or 316 stainless
• Finish: plasma-cut edge, deburred, mill finish (unpainted)
• Made in Knowsley, Merseyside

Need a right-angle triangle? See gusset plates. For other angles or rounded corners, send us a drawing.

Common uses

Equilateral triangles are used for warning and wayfinding sign blanks, tripod and three-leg base plates, corner shelves, decorative and geometric panels, and frame bracing. The height of an equilateral triangle is about 0.87 × the side length.

Choose your material

• Mild steel: the economical choice. Paint, prime or galvanise it for outdoor use.
• 304 stainless: the everyday stainless grade for indoor and sheltered outdoor use.
• 316 stainless: best near the coast, pools, salt or chemicals. 304 vs 316 explained.

How to order

1. Pick your material and thickness.
2. Pick the side length.
3. We plasma cut, deburr and pack your order.
4. Delivery is added at checkout.

Made to order. We email your dispatch date. See delivery rates.

Questions

How tall is a 300 mm triangle?
About 260 mm from the base to the tip.

How much does a 300 mm triangle weigh?
About 0.9 kg in 3 mm mild steel.

Are these laser cut?
No. They are plasma cut and deburred, so edges show a plasma-cut finish and are not held to laser-cut tolerances. For tight-tolerance parts, send us a drawing.