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Engineering Steel Bar — Bright Round Bar

Bright Round Bar.
Cut to Length from 10mm.

Bright drawn round bar in 20+ engineering steel grades — 3mm – 310mm diameter, metric and imperial. Cold drawn to h9, h10 or h11 tolerance per BS EN 10278. Goes directly onto CNC lathes without preliminary turning. Cut to any length from one piece.

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Bright round bar with green colour-coded ends — cold drawn to h9/h10/h11 tolerance per BS EN 10278
Operative picking bright round bar from blue cantilever racking — Parkside Steel stockholding facility
Macro shot of bright bar in racking — smooth drawn surface visible with yellow protective wrapping
Bright bar ends close-up with yellow colour code — diameter marked on rack label
3mm–310mmDiameter range
h9/h10/h11BS EN 10278
1 pieceMinimum order
2–3 daysCut-to-length
About This Profile

What is Bright Round Bar?

Bright round bar is produced by cold drawing hot-rolled steel through a precision die. The drawing process compresses the bar, producing a smooth, clean surface and precise diameter tolerances — typically h9, h10 or h11 per BS EN 10278. The dimensional accuracy means bright round bar goes directly onto a CNC lathe without preliminary turning, saving time and reducing waste.

Available in all 20+ engineering grades from EN1A free-cutting steel through to EN24T nickel-chromium-molybdenum alloy. Both metric diameters (3mm–310mm) and imperial sizes (1/8" to 6") held in stock. Cut to any length from one piece — standard cut tolerance is −0/+2mm.

Tolerances

Dimensional Standards.

Bright drawn: Cold drawn through a die after hot rolling. Upper deviation = 0 (never oversize).
h9 — tightest tolerance, diameters to ~50mm. h10 — 50–80mm. h11 — 80mm+. All per BS EN 10278.

Full tolerance tables by diameter: BS EN 10278 reference ›

Size Range

Available Sizes.

Stocked in both metric and imperial sizes. Cut to any length from 1 piece. −0/+2mm standard cut tolerance.

GradeBS / EN DesignationSize RangeConditionStandard
EN8080M406–150mmBright drawnBS EN 10277 / h9–h11
EN8D080A426–150mmBright drawnBS EN 10277 / h9–h11
EN8M212A426–150mmBright drawn (free-cutting)BS EN 10277 / h9–h11
EN16T605M368–100mmBright drawn, H&TBS EN 10277 / h9–h11
EN19T708M408–100mmBright drawn, H&TBS EN 10277 / h9–h11
EN24T817M40T8–100mmBright drawn, H&TBS EN 10277 / h9–h11
EN1A230M075–210mmBright drawn (free-cutting)BS EN 10277 / h9–h11
EN1A Pb230M07Pb5–210mmBright drawn (leaded)BS EN 10277 / h9–h11
EN3B070M203–310mmBright drawnBS EN 10277 / h9–h11
BMS080A153–310mmBright drawnBS EN 10277 / h9–h11
EN32M210M153–100mmBright drawn (case hardening)BS EN 10277 / h9–h11
EN9070M5510–80mmBright drawnBS EN 10277 / h9–h11
S355 J2S355J210–80mmBright drawnBS EN 10025 / h10–h11
Applications

Typical Applications.

  • ✓General engineering shafts and axles
  • ✓CNC and automatic lathe turned components
  • ✓Spindles, mandrels and arbors
  • ✓Keys, studs and stressed pins
  • ✓Hydraulic component bar stock
  • ✓High-volume automatic turning (EN1A, EN1A Pb)
Related Technical Guides

Go Deeper.

Grade Equivalents► Bright Bar Tolerances► Weight Calculator►
Steel Grades Available in Bright Round Bar

Choose Your Grade.

All grades listed below are available in bright round bar. Click any grade for full data sheet, chemical composition and mechanical properties.

EN8080M40Medium carbon — general shafts, keysEN8D080A42Medium carbon — supplied to analysisEN1942CrMo4Cr-Mo alloy — high-tensile shaftsEN24T817M40T / 4340Ni-Cr-Mo Q+T pre-treatedEN1A230M07Free-cutting — automatic turningEN3B070M20Mild steel — weldable fabricationEN9070M55High carbon — wear, springsEN36655M13Case hardening — gearsS355S355J2Structural — fabricationEN8M212A42Free-cutting medium carbonEN16T605M36Mn-Mo alloy — high tensile, H&TEN1A Pb230M07PbLeaded free-cuttingEN32M210M15Case hardening — low carbonBMS080A15Bright mild steel — weldable, general purpose

Ready to Order Bright Round Bar?

Tell us your grade, size and quantity. We confirm stock, price and delivery date on the same call.

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