Bright Mild Steel Round Bar 3m - EN3B 080A15 Bar 4mm to 25mm

Buy our bright mild steel round bar in grade EN3B (080A15), supplied in 3m lengths. Bright drawn for a smooth surface finish and close dimensional tolerance, this round bar is ideal for machining, turning, shafts, pins and precision fabrication. Available in diameters from 4mm to 25mm, from £23.99, with cut-to-size available on request and fast UK delivery.

Sizes and Prices

All bars are bright drawn EN3B mild steel in 3m lengths. Cut to size is available on request - contact us before ordering with your required lengths.

Key Features

• Grade EN3B (080A15) bright drawn mild steel
• Smooth bright surface finish and close dimensional tolerance
• Solid round section in 3m lengths
• Diameters from 4mm to 25mm
• Ideal for machining, turning, drilling and precision fabrication
• Suitable for shafts, pins, dowels and engineering components
• Cut to size available on request

About EN3B (080A15) Bright Bar

EN3B, also known as 080A15, is a low-carbon bright drawn mild steel. The bright drawing process gives a smoother surface finish and tighter dimensional tolerance than hot-rolled bar, making it well suited to machining, turning and applications where finish and accuracy matter. It is readily welded, drilled and fabricated.

Bright Bar vs Hot-Rolled (Black) Bar

Bright bar is cold drawn for a clean, accurate finish and closer tolerance, ideal for machining and visible work. Hot-rolled (black) bar, such as our S275 round bar, has a darker scaled surface and looser tolerance, and is typically chosen for general structural and fabrication use where finish is less critical.

Common Uses

Machining and turning, shafts, pins, dowels and spacers, engineering components, brackets, repair work and general precision fabrication.

Finish

Supplied bright drawn with a smooth finish. Bright bar is not corrosion-protected, so for outdoor or damp use it should be cleaned and protected with a suitable coating.

Delivery Information

Lead times are currently 3-5 working days. Bars are supplied in 3m lengths, so suitable delivery access is required. If your order is long or heavy, please ensure someone is available to help with offloading on arrival.

Frequently Asked Questions

What is EN3B bright mild steel?
EN3B (080A15) is a low-carbon bright drawn mild steel with a smooth, shiny finish and tight dimensional tolerances. It is the standard material for turned parts, machining stock and applications where surface finish matters.

How does bright bar differ from black bar?
Bright bar is cold-drawn through a die, giving a smooth surface, accurate diameter and closer tolerances. Black bar is hot-rolled with a rough mill scale surface and wider tolerances. Bright suits machining; black suits structural fabrication.

What diameters are available?
4mm upwards in 3m lengths. Check the product page for the full diameter range.

Can EN3B be case-hardened?
Yes. EN3B is a low-carbon steel that can be case-hardened (carburised) to give a hard wear-resistant surface with a tough core. It is widely used for pins, shafts and small machine components for this reason.

What is bright round bar used for?
CNC and manual turning, machined pins and shafts, dowels, axles, bushings, spacers, model engineering, furniture components and any application requiring a precise, clean-finish bar.