Round steel bars from 6 to 150mm in bright cold-finished and black hot-rolled condition. Free-cutting, medium carbon and alloy grades including EN8, EN19 and EN24, with Mill Test Certificate on every shipment.
Black bar is hot rolled with mill scale left on. Bright bar is cold drawn, turned or ground to a clean surface and tight diameter tolerance. The price gap reflects the extra processing, and buying the wrong one either wastes money or adds a machining operation.
If your part is going to be fully machined anyway, black bar with enough allowance is cheaper. If the bar diameter becomes a finished surface of the part, bright bar saves a turning operation and usually wins on total cost.
Bar grade decides how the part machines and whether it can be heat treated. These are the grades most commonly specified for export:
On specifications: the figures above reflect standard industry specifications for this product. Your actual batch values are confirmed on the Mill Test Certificate or Certificate of Analysis issued against your specific lot — provided with every shipment, and with sample orders before you commit to bulk. We do not ask buyers to take a specification on trust.
HS Code 7214 (hot rolled bars) · 7215 (cold finished bars) · 7228 (alloy steel bars). Heat number marked on bundles.
MOQ is discussed at order stage based on grade and diameter. Payment by advance TT, LC at sight, or DP/DA case by case.
If the bar will be fully machined, black bar with enough machining allowance is cheaper. If the bar diameter becomes a finished surface of the part, bright bar held to h9 or h11 saves a turning operation and usually wins on total cost. Black bar carries mill scale and wide diameter tolerance; bright bar is clean, straighter and dimensionally tight.
EN8 is a medium carbon steel for shafts, bolts and general engineering, with tensile strength around 550 to 700 MPa. EN24 is a nickel-chromium-molybdenum alloy steel that can be heat treated to much higher strength and toughness, used for heavy-duty shafts and critical components. EN24 costs substantially more, so specify it only where the load genuinely requires it.
Free-cutting grades such as EN1A or 1215, which contain sulphur and sometimes lead to break chips cleanly and allow high cutting speeds. They are not suitable for heat treatment or high-stress parts, but for high-volume turned components they cut cycle time considerably.
Typically h9 or h11 under ISO 286, meaning the bar is held to a narrow band below nominal diameter. Specify the tolerance class you need rather than assuming, since h9 costs more to produce than h11.
Hot rolled bars fall under HS Code 7214, cold finished bright bars under 7215, and alloy steel bars under 7228. We declare the correct code based on the grade and process ordered.
Yes, on request. Ultrasonic testing detects internal defects such as pipe, inclusions and laminations, and is worth specifying for bars going into critical shafts or pressure-bearing components where an internal flaw would cause failure in service.
Technical drawings welcome. FOB or CIF pricing within 24 hours. Third-party inspection available.
Technical drawings welcome. FOB or CIF pricing, samples available.
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