Carbide mining

When sourcing carbide for mining, the most critical factor is the Grade (Cobalt content and Grain size). For hard rock drilling, look for 6%-10% Cobalt content to balance hardness and toughness. Ensure the Hardness (HRA) is typically between 86.0 and 92.0, and the Transverse Rupture Strength (TRS) exceeds 2500 N/mm² to prevent premature fracturing under high-impact loads.

Compatibility depends on Dimensional Precision and Attachment Method. Verify that the supplier provides ISO standard tolerances (typically ±0.05mm) for diameters and heights. For button bits, confirm the interference fit requirements for cold-pressing or hot-shrinking. Request CAD drawings or 3D models from the supplier to verify the geometry against your drill bit bodies.

Prioritize suppliers with ISO 9001:2015 for quality management and ISO 14001 for environmental standards. For mining safety, ensure the products meet ASTM B276 standards for porosity and ASTM B390 for grain size evaluation. If the products are for the US market, check for MSHA (Mine Safety and Health Administration) related material safety data sheets (MSDS).

Spherical (Ball) buttons are best for extremely hard formations to minimize breakage. Conical or Parabolic buttons are ideal for medium-hard rock to increase penetration rates. Chisel inserts are specifically designed for percussive drilling in soft to medium-hard ground where high shearing action is required.

Request a Metallographic Analysis Report and a Coercive Force (Hc) test result. Recycled powder often shows inconsistent grain structures. You should also utilize Third-party Inspection services (like SGS or Intertek) to perform a Specific Gravity test before the final balance payment is made to ensure the density matches the virgin material specifications.

Focus on Total Cost of Ownership (TCO) rather than just the unit price. Negotiate based on Weight-based pricing for bulk orders (e.g., per kg) and ask for tiered pricing based on annual volume. Request a sample trial period where the supplier provides a small batch at a discount to prove the service life (meters drilled) compared to your current brand.

Carbide is extremely dense and heavy; ensure the supplier uses reinforced, double-walled wooden crates with internal padding to prevent movement. For sea freight, specify FOB (Free On Board) terms to maintain control over your shipping costs. Ensure the HS Code (typically 8209.00) is correctly declared to avoid customs delays or incorrect duty applications.

Always use Secured Payment services provided by Made-in-China.com to ensure funds are only released after proof of shipment. For high-value contracts, consider a Letter of Credit (L/C). Ensure the contract includes a Quality Warranty Clause stating that the supplier is liable for replacement or refund if the breakage rate exceeds a specific percentage (e.g., >2%) within the first 50 hours of operation.