Cemented carbide brazed tips

Selecting the right grade is critical for performance. For turning steel, look for P-series (ISO P10-P40) grades which offer high resistance to crater wear. For cast iron, K-series (K10-K30) is preferred due to its superior abrasion resistance. If you are machining stainless steel or heat-resistant alloys, prioritize M-series grades. Always verify the Cobalt (Co) content; a higher percentage increases toughness but reduces hardness, while lower content enhances wear resistance for high-speed finishing.

Buyers must confirm the geometric dimensions (Length, Width, Thickness) and the nose radius to ensure compatibility with the tool shank. Check the hardness (HRA), which should typically range between 89.0 and 93.0 for standard industrial use, and the Transverse Rupture Strength (TRS) to ensure the tip can withstand heavy cutting loads without fracturing. Additionally, ensure the brazing surface is pre-treated or cleaned to facilitate a strong bond during the welding process.

Ensure the manufacturer adheres to ISO 9001:2015 for quality management systems. For the products themselves, look for compliance with ISO 513 (classification of hard cutting materials). Request Material Test Reports (MTRs) that detail the chemical composition (Tungsten Carbide/Cobalt ratio) and physical properties. On Made-in-China.com, prioritize Audited Suppliers who have undergone third-party onsite inspections by entities like SGS or TÜV Rheinland.

The brazing temperature and the filler metal (usually silver or copper-based alloys) are vital. If the temperature is too high, it can cause thermal cracking in the carbide. Ensure the supplier provides tips with low internal stress. For high-precision work, ask if the tips are suitable for induction brazing or vacuum brazing, as these methods provide more uniform heat distribution and stronger joints compared to flame brazing.

The most effective strategy is to request a sample batch for hardness and density testing before placing a bulk order. Use Made-in-China.com's Secured Trading services to ensure payment is only released after the goods pass inspection. Additionally, check the density (g/cm³) of the received goods; low-quality recycled powder will result in inconsistent density and premature tool failure.

Carbide prices are heavily influenced by the market price of Tungsten (W) and Cobalt (Co). Negotiate based on volume-based pricing tiers; for orders over 500kg, you can typically secure a 5-10% discount. Regarding lead times, standard tips usually take 10-15 days, but custom shapes may require 25-30 days for mold creation. Always clarify if the quoted price is FOB (Free On Board) or CIF (Cost, Insurance, and Freight) to avoid hidden logistics costs.

Cemented carbide is extremely dense and heavy, making shipping costs a significant factor. For small batches, air express (DHL/FedEx) is fast but expensive; for bulk orders, sea freight is more economical. Ensure the supplier uses moisture-proof packaging (plastic cases with anti-rust oil) and reinforced wooden crates to prevent the tips from chipping or breaking during transit due to their brittle nature.

Always conduct transactions through official channels on Made-in-China.com to maintain a legal paper trail. Verify the HS Code (typically 8209.00) for correct customs declaration and to check for any anti-dumping duties applicable in your specific country. Ensure all Commercial Invoices and Packing Lists accurately reflect the weight and material grade to prevent delays during customs clearance.