Size: Dia. 15-150mm Hardness: Hrc 55-65 Chemical elements: C: 0.50 - 0.75 si: 0.17-0.37 Mn: 0.6-1.2 s: ≤ 0.035 P: ≤ 0.0035 cr: ≤ 0.25 Applied field: *mines, *cement plants, *power stations, *chemical industries. Our Grinding Ball&＃039;s Physical Mechanics: ZhangqiuZhi xin Industrial & Mining Materials Co Ltd (ZhangqiuCity Zh xin Trading Co Ltd is one wholly-owned subsidiary for overseas business)is specialized and served in metal industries & mining about 13 years as manufacturer and exporter of high quality cost-effective , standardized and customized all varies of cast & forged steel products Our current company covers about ten thousand square meters, and has more than 580 employees both workers and engineers, including enough machinery and inspection equipments. And adopted the first-class manufacturing skills in the production process, we are trying to open overseas market together with your esteemed company, most of these products are being exported to Europe, Middle East, South Asia, Iran, USA, Canada, South America and some areas of Africa, more than 40 countries and areas, and were enjoying good reputation among our customers, the main productions: Forged Carbon/Stainless Steel Flanges (ANSI, JIS, DIN standard); Industrial Forged Gears/ Splines/Sleeve Spindles & some casting Chromium/forging steel balls for the use of mines/cements/power stations/Chemical industries. At this moment we have full production & exporting capacity of producing more than 60, 000 tons per year. Over the years, the enterprise insists on "practical, sincerity experience, quality first, customer first" purpose, and service for users with science and technology leading guiding ideology to build brand, creates the first-class star enterprises. TEL:+86 531 8332 3855 8323 5268 FAX:+86 531 8332 3855 E-MAIL: ***** or liangflying1@hotmail .com HOMEPAGE:*****