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  • High Chrome Grinding Ball - China

    price: contact company for price

    High Chrome Grinding Ball
    Size of casting iron ball:
    Small size: Ø10mm--Ø40mm; Medium size: Ø50mm--Ø90mm;
    Big size: Ø100mm--Ø150mm.
    Series of balls according to the chrome percentage:
    High chrome casting ball: More than Cr:10%;
    Medium chrome casting ball: Cr:3%-9%;
    Low chrome Grinding ball: Cr:1%-3%.
    Features of casting grinding balls
    (1) High hardness: surface hardness of casting iron ball is to HRC 58-65. The tolerance of the core hardness and surface hardness is not over 2HRC;
    (2) Good Impact Toughness: impact toughness of chrome balls is more than 4J/cm²;
    (3) Low Broken Rate: the actual broken rate is not higher than 1%;
    (4) Good Wear-resistant: the wearing rate of high cast iron ball is 30-50g/ton in cement industry, 350-430g in gold mines and even lower in some iron mines. CHEMICAL COMPOSITION(%)
    Type C Si Mn Cr P S Mo Cu Ni
    ZQCr 13 2.0-3.2 0.3-1.2 0.3-1.5 11-13 ≤0.10 ≤0.06 0-1.0 0-0.08 --
    ZQCr 17 2.0-3.0 0.3-1.3 0.3-1.5 15-18 ≤0.10 ≤0.06 0-1.0 0-0.08 --
    ZQCr 20 2.0-2.8 0.3-1.0 0.3-1.5 18-22 ≤0.10 ≤0.06 0-1.0 0-0.08 --
    ZQCr 26 2.0-2.8 0.3-1.0 0.3-1.5 22-28 ≤0.10 ≤0.06 0-1.0 0-0.08 --
    HRC Impact toughness ak(J/cm2) Time of falling balls Microstructure
    58-66 ≥4.0 ≥15000 M+C
    M - Martensite C - Carbide


    Company Contact:


    • Phone: 86-010-65003129

    • Address: Kuangcheng, Chengde City, Hebei Province, China, Chengde, Hebei, China

    • Email: Email


    Published date: October 11, 2017 -

    • Business Description: Chengde Rongmao Cast Steel Co.,Ltd. founded in 1980s, and located in historic and cultural city - Chengde China, is a large-scale casting & forging enterprise. For thirty years Rong Mao has produced Austempered Ductile Iron (ADI) grinding ball, Forged grinding balls, ball mill liner, various models of jaw crusher tooth plate, hammer crusher liner, castor-oil plant section, high-chromium alloy combined hammer and all kinds of high manganese steel castings. The company has 400 staff, including technical management personnel of 80 and 30 with senior and medium professional titles, and its plant covers an area of 36,000 square meters, with workshop area of 26,000 square meters and fixed assets of 200 million yuan. The annual output is 100,000 tons.
      Faced with fierce market competition, the company relys on advanced production equipment, perfect detection technology,standard casting process, innovative heat treatment experience and scientific testing means, and an accurate analysis of the chemical composition to produce good wear resistance and low broken rate products, which are sold through the country. “Rong Mao” brand is known nationwide; In 2007 Chengde Rong Mao Cast Steel Co., Ltd successfully passed the ISO9001 quality system certificate and ISO14000 environment system certification. With stable development, excellent product quality and honest services, the company stands out from the domestic foundry industry, and becomes a key member of China Foundry Association, and in successive years has been awarded as “honor contract and keep promise” company by provincial and municipal government.
      Our company has been adhering to high-quality, low-cost, timely business policy to won the recognition of mining, cement, and metallurgical enterprises. Our products are sold to Hebei, Liaoning, Shandong, Shanxi, Henan, Inner Mongolia, Jilin and North Korea, South Korea, Mongolia, Russia and many countries.We will insist the business philosophy of "science and technology as the driving force, survival on quality, and good faith striving for the development", dedicate to provide you with first-class products and quality service, and welcome new and regular customers to come and give guidance. Let's meet in Chengde, China.

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