Import Casting Grinding Ball — Buy in Bulk from Supplier in China

The casting grinding ball from Sinya International Trade Co., Ltd is manufactured for industrial grinding applications in mining, cement, and power generation. It is produced in diameters ranging from 40mm to 150mm, with a hardness range of 55 to 65 HRC as confirmed by the supplier's technical data. The chemical composition includes carbon at 0.72-0.82%, silicon at 0.17-0.37%, manganese at 0.7-0.8%, phosphorus at or below 0.035%, sulfur at or below 0.035%, and chromium content adjusted for enhanced wear resistance in high-impact environments.

These balls are cast using medium-carbon alloy steel with controlled cooling to achieve consistent microstructure. The hardness profile is typical for high-chrome grinding media, where chromium content between 1.5% and 3.0% improves abrasion resistance without compromising toughness. Surface finish is smooth with minimal scale, and dimensional tolerance is typically within ±1.5mm for sizes above 80mm. These characteristics align with standard industry practice for wet and dry grinding circuits, particularly in ball mills operating at 70-85% critical speed.

Buyers in cement plants and mineral processing facilities use these balls to reduce ore particle size with minimal contamination. The product is shipped in bulk, typically in 1-ton polypropylene woven bags or steel drums, with palletized loading for container transport. Trade terms include FOB Tianjin or CIF ports, with minimum order quantities typically starting at 5 metric tons. Lead times are generally 20 to 30 days after deposit, subject to production scheduling.

Sinya International Trade Co., Ltd is based in Tangshan, Hebei, China, and operates as an exporter of industrial grinding media. The company is listed as an imported supplier with harbor trust tier, indicating verified export documentation and customs compliance. The supplier address is confirmed as 1204-3-1, Biyuhuafu Building, Weiguo Road, Tangshan. No information is provided regarding factory ownership, production capacity, or years in operation.

The supplier has no recorded response rate or average response time, suggesting limited direct buyer engagement on the platform. There are no certifications, client lists, or production facility details disclosed in the listing. All claims are limited to product specifications and trade terms. Buyers should verify production source and quality control procedures directly before placing orders.