Import Best Quality Expandable/Expanded Graphite Powder — Buy in wholesale FOB from Supplier in China

Expandable graphite powder from Shandong Sungraf Carbons Co., Ltd is a natural flake graphite intercalated with sulfuric acid compound, designed to expand volumetrically when exposed to temperatures above 200°C. The material achieves a controlled expansion volume that creates intumescent barriers for fire protection applications. Shandong Sungraf Carbons, based in Qingdao, Shandong Province, has produced and exported this material since 2008, with production supported by ISO9001 quality management implementation and standard laboratory verification facilities. The powder is supplied for fire retardant coatings, intumescent sealants, gaskets, and battery anode manufacturing.

The base material is natural flake graphite subjected to sulfuric acid intercalation, a chemical process that inserts acid molecules between graphene layers to create a compound that exfoliates under heat. Typical standard grades for expandable graphite range from 80 to 99.9% carbon content, with expansion volumes from 150 to 350 mL/g depending on intercalation degree and particle size distribution. Typical mesh sizes span 32 mesh to 200 mesh (450 to 75 microns). The intercalation process determines onset temperature, expansion ratio, and residual sulfur content, all of which affect performance in specific end-use formulations. Standard industry purity grades include 95%, 98%, and 99% carbon minimums, with sulfur content typically between 2% and 4% by weight for sulfuric acid intercalated products.

Buyers in construction chemicals, automotive sealing, and battery manufacturing sectors import this material for compounding into fire-resistant coatings, expansion joints, and conductive additives. The supplier operates from Qingdao with harbor-tier platform standing and zero recorded response rate, so direct enquiry is essential to confirm current production capacity, minimum order quantities, and lead times. Packaging is typically in 25 kg paper-plastic composite bags or 500 kg to 1,000 kg bulk bags, though buyers should confirm exact options with Shandong Sungraf Carbons directly. Incoterms, port of shipment, and payment terms require explicit agreement with the supplier.

Shandong Sungraf Carbons Co., Ltd is headquartered on Duhua Road in Qingdao, Shandong Province, with postal code 266000. The company was founded in 2008 and states more than ten years of production and export experience in carbon materials. Its facility includes standard laboratories for product verification, and the company applies ISO9001 quality management system controls to production processes. The supplier holds harbor-tier trust standing on the platform, with a zero percent response rate and zero average response hours recorded, indicating no reliable responsiveness data is available through the platform channel.

The company profile highlights proprietary technologies for producing expandable graphite with what it describes as outstanding conductivity and high purity characteristics. It does not disclose annual production capacity, specific factory size, employee count, revenue figures, or named client companies. The supplier actively solicits direct enquiry for catalogues and product details, suggesting that substantive commercial terms, certification documents, and technical data sheets are available upon direct request rather than through public listing. Buyers should treat all trade terms as requiring explicit confirmation with the supplier's sales representatives.