Precision Cold Drawn Steel Bar Manufacturer in China

YaDa is a factory-direct precision steel manufacturer located in Tianjin, China. We are not a pure trading company. Our in-house production covers raw material preparation, peeling, phosphating and soaping, cold drawing, straightening, grinding, polishing, cutting, packing and final QA inspection.

Cold drawn steel bars are processed at room temperature after proper surface preparation. Compared with hot rolled bars, they provide tighter dimensional tolerance, brighter surface finish, improved straightness, higher yield strength and better machinability. This helps customers reduce turning allowance and shorten CNC machining time.

Yes. Manufacturing custom cold drawn steel profiles is one of YaDa’s core capabilities. We can evaluate your CAD drawing, confirm the grade and tolerance requirements, and design the drawing dies for D-shaped, triangle, trapezoid, segment and other non-standard steel profiles.

Depending on the steel grade, shape, size and finishing process, YaDa can control dimensional tolerance up to ±0.05mm. Common tolerance standards such as h8, h9, h10 and h11 can be discussed based on your application, machining method and inspection requirements.

We manufacture cold drawn bars in carbon steel, alloy steel and stainless steel, including A36, 1018, 1020, 1045/CK45, 4140/SCM440, 5120, 5140, 4340, 20CrMnTi, 304, 316 and 17-4PH. Materials can be supplied according to GB, ASTM and JIS requirements.

By controlling size, straightness and surface quality before shipment, our bars help reduce machining allowance, pre-turning, vibration and tool wear. For CNC auto-lathe users, a bright and consistent precision steel bar can improve processing stability and reduce unnecessary material removal.

Available processes include cold drawn, peeled, centerless ground, polished and straightened finishes. For applications requiring a brighter surface, we can provide ground and polished steel bars with surface roughness commonly reaching Ra 0.4–0.8, depending on product size and technical requirements.

Yes. In addition to cold drawn round, square, flat, hexagonal and custom profile bars, YaDa also manufactures chrome plated hydraulic cylinder rods and precision piston rods for hydraulic systems, construction machinery and heavy equipment applications.

Yes. YaDa Industry manufactures cold drawn steel wire used for resistance welding applications, including plain cold drawn steel wire, ribbed cold drawn steel wire and black annealed wire. These products are used for welded steel mesh, steel truss deck and reinforcement cage production. They are raw material steel wires, not MIG/TIG welding consumables.

Please provide steel grade, shape, size, tolerance, length, surface finish, heat treatment condition, quantity, destination port and application. For custom steel profiles, a CAD drawing or cross-section drawing will help our engineering team evaluate tooling feasibility and quote more accurately.

Each batch is checked for dimensions, straightness, surface condition and mechanical performance according to order requirements. Our in-house process control from raw material inspection to final packing helps ensure stable quality for long-term B2B supply.