304 bar: what it costs in the UK

As read on 5 Oct 2026, Ø25 mm 304 round bar is listed from £36.96 per metre ex VAT (AMB Steels (Sheffield)), up to £50.20 per metre (Rapid Metals). We track 10 sizes of 304 (round, flat and square bar); the cheapest price for each is in the table above. These are online list prices excluding delivery; an account price will usually be lower.

Ø16 mm round from £18.60/m (Aluminium Warehouse); Ø20 mm round from £23.71/m (AMB Steels); Ø25 mm round from £36.96/m (AMB Steels); Ø25.4 mm round from £36.26/m (Aluminium Warehouse); Ø40 mm round from £96.00/m (AMB Steels); Ø50 mm round from £148.80/m (AMB Steels); 16 mm square from £28.28/m (Aluminium Warehouse); 20 mm square from £38.00/m (Aluminium Warehouse); 25 mm square from £55.00/m (Aluminium Warehouse); 20 × 8 mm flat from £14.08/m (Aluminium Warehouse), as read on 5 Oct 2026, per metre ex VAT.

At Rapid Metals, the stockist with the longest record for this grade, Ø25 mm 304 was £33.00 per metre in Oct 2021 and is £50.20 now (+52%). Its highest recorded price was £60.20 in May 2022.

This week the dearest Ø25 mm listing is 1.4× the cheapest. Online stockists price in cutting, handling, stock-holding and the small-order market they serve, and finish and certification can differ between listings. Shops marked retail sell mainly to the public. Delivery charges differ too and aren't included here. Compare the total delivered cost for your order, not the per-metre figure alone.

1 m of Ø25 mm bar is π × (12.5 mm)² × 1 m × 7.93 g/cm³ = 3.893 kg, using the density on our 304 material page. So £36.96/m is £9.49/kg. The lowest per kg this week, across every size we track, is £9.02/kg for Ø25.4 mm round. Small-section retail bar costs far more per kg than mill or trade prices.