Carbon steel round, flat, square and hex bars supplied for structural fabrication, machining and general manufacturing, with hot-rolled and cold-finished routes, cut lengths, inspection, traceability and export packing available.
Start with the cross-section shown on the drawing. The shape changes how the bar is measured, processed and inspected, so we do not treat every steel bar as the same product.
Common for shafts, pins, machined components and general fabrication.
Order by diameter × length.Used for brackets, straps, supports, fabricated parts and general manufacturing.
Order by thickness × width × length.Used in structural fabrication, general components and machining blanks.
Order by side × side × length.Used for machined components, fittings and parts where a hexagonal section reduces later machining.
Order by across-flats size × length.Smooth carbon steel round bar is supplied for fabrication or machining. Reinforcing bar has a ribbed profile and is ordered to concrete-reinforcement standards. For ribbed reinforcement, see Steel Rebar →
A bar that will be welded into a frame is bought differently from a bar that will be turned into a shaft. We separate structural grades from machining grades so the quotation follows the actual use.
These grades are commonly selected where strength, weldability and fabrication are more important than later turning or precision machining.
For machining-bar orders, carbon level, finished diameter, straightness, surface and machining allowance can matter more than a structural-strength designation.
A36 is usually purchased as a structural grade. 1045 is a medium-carbon engineering grade commonly selected when machining, hardness or mechanical performance matters more. Tell us what the finished part does, not just the dimensions.
The same bar shape can follow two very different buying routes. A structural bar is usually selected around grade, section and weldability. A machining bar is selected around the finished component as well.
Start with grade, bar shape, section size, length and fabrication requirement.
Add finished diameter, machining allowance, straightness and required surface condition.
Send the drawing. We can review whether the material callout matches a structural or machining-bar route.
The choice is not only about appearance. It changes surface condition, dimensional control and how much machining may be needed later.
Common for structural work and machining blanks where a mill-scale surface and broader dimensional tolerance are acceptable.
Chosen when a cleaner surface and closer size control reduce later machining or finishing work.
Oiling can be reviewed when storage or shipment conditions require additional short-term protection.
A clear size description prevents quotation errors. We confirm the available mill size after the grade and quantity are known.
| Bar Shape | How to Specify It | Example RFQ Format |
|---|---|---|
| Round Bar | Diameter × Length | Ø50 mm × 6,000 mm |
| Flat Bar | Thickness × Width × Length | 10 × 100 × 6,000 mm |
| Square Bar | Side × Side × Length | 50 × 50 × 6,000 mm |
| Hex Bar | Across Flats × Length | AF 36 mm × 6,000 mm |
Send the finished blank length and whether the piece will be machined later. We can review whether extra stock should remain for facing, turning or other subsequent machining.
A round bar is not checked the same way as a square, flat or hex bar. The inspection points follow the geometry that matters to the next operation.
Diameter is measured at suitable positions and straightness is checked when it affects machining or assembly.
Square bar is checked by side and diagonal; hex bar is checked across flats, together with straightness or twist where required.
Thickness, width, straightness and edge condition are checked against the confirmed supply route.
Mill lengths are not always the most efficient form for a machine shop or fabrication line. Bars can be cut into shorter blanks when that reduces handling or later sawing work.
Suitable bars can be cut to fixed blank lengths before packing.
If the cut blank will be faced or turned, include the finished part size so suitable allowance can be reviewed.
Finished blank length and cut-end condition can be checked before bundling or boxing.
Cutting a six-meter bar into shorter blanks should not remove the link to the original heat and material certificate. Identification is carried through processing and packing when traceability is required.
Packing is based on length, section, surface condition and handling risk rather than using the same bundle for every bar order.
Bundled with multiple steel straps and supported at several points to reduce bending and handling damage.
Pallets or boxes can be used when short pieces would be unsafe or difficult to handle as a conventional long bundle.
Additional rust and surface protection can be used when the delivered surface needs more protection than standard hot-rolled bar.
For bar applications where corrosion resistance is required through the material.
View Stainless Steel Bar →For ribbed reinforcing bar and reinforcement products used in concrete construction.
View Steel Rebar →For project orders combining bars with plate, cut components or fabricated steel.
View Carbon Steel Plate →For H beam, I beam, channel and angle purchased with general structural bar material.
View Structural Steel →A36 is commonly selected for structural fabrication and welding. 1045 is a medium-carbon engineering steel commonly selected for machined or mechanical components where carbon level and mechanical performance matter more. They should not be substituted automatically.
Use the required surface, dimensional tolerance and next operation as the guide. Hot-rolled bar is common for structural work and machining blanks; cold-finished bar is useful when closer size control or a cleaner surface reduces later work.
Yes, for suitable orders. Send the required blank length and tell us whether the piece will be machined afterward so machining allowance can be considered.
For round bar send diameter × length; flat bar thickness × width × length; square bar side × side × length; and hex bar across-flats size × length.
Grade, bar shape, size, length, quantity and destination are enough to start. If the bars will be machined later, add the finished-part requirement or upload the drawing.
