China Solid Bar Manufacturers & Factory

China holds direct upstream sovereignty over tungsten concentrate reserves. Factories like ours in Jiangxi handle the complete chain: reduction from APT to pure tungsten powder, carburization to WC, vacuum wax milling, extrusion pressing, and integrated sinter-HIP furnace processing. This vertical integration cuts batch variances and reduces procurement lead-time, offering Tier-1 consistency at competitive cost structures.

Conventional vacuum sintering relies strictly on capillary liquid cobalt action, which can leave trace internal pores (A04/B02 level). Sinter-HIP (Hot Isostatic Pressing) introduces 6-10 MPa inert argon gas directly at liquidus temperature (1400–1450°C), closing residual microscopic voids to achieve near 100% theoretical density, substantially upgrading transverse rupture strength and edge reliability during interrupted cuts.

Yes. Beyond standard solid unground and ground cylindrical bars, our facility manufactures single straight coolant hole rods, double parallel internal coolant holes, 30°/40° twisted dual helical coolant channels, DIN 6535-HB Weldon flats, pre-chamfered leads, and near-net-shape stepped blanks built to customer drawings.

Standard centerless ground carbide rods adhere to ISO h6 and ISO h5 limits. On specialized OEM tooling requests, we achieve outer diameter tolerances of 0 to -0.005 mm, with total runout under 0.002 mm per 100 mm length and surface finishes down to Ra < 0.1 µm, ready for multi-axis Walter, Rollomatic, or ANCA grinding systems.

For standard off-the-shelf solid bars (such as Ø3mm to Ø20mm in 330mm lengths), the MOQ starts from 1 piece for initial evaluation and validation. Custom non-standard compositions or specialized diameters feature rapid sampling within 7–10 working days, with mass orders usually dispatched in 15–25 days supported by batch inspection certificates.