Hexagon & Octagon Steel Plates – Cut to Size

Flat regular hexagon and octagon plates, plasma cut from 3, 4 or 5 mm mild steel, 304 or 316 stainless. Sizes run from 100 mm to 600 mm across flats.

At a glance

• Shapes: regular hexagon (6 sides) or octagon (8 sides), no holes
• Sizes: 100, 150, 200, 250, 300, 400, 500 or 600 mm across flats
• 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 different polygon, a centre hole or a custom size? Send us a drawing.

Measuring across flats

Sizes are measured across flats, which is the distance between two opposite parallel sides. Across the corners is larger: about 1.15 × the flats size for a hexagon and 1.08 × for an octagon. Hexagon and octagon plates are popular for table and stool tops, plinths, base plates for planters and fire pits, signs and decorative panels.

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 shape and the size across flats.
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. Need a round plate instead? See circular metal plate.

Questions

What does 300 mm across flats measure corner to corner?
About 346 mm for a hexagon and 325 mm for an octagon.

How much does a 300 mm hexagon weigh?
About 1.8 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.