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Cast Iron Grinding Balls - China

price: contact company for price

Our cast iron grinding balls can be divided into three categories

including the high chromium type, medium chromium type and the low

chromium type.

1. The Quality Index of the High Chromium Type

The chromium content of the high chromium type product is greater than or equal to 10.0% . And the carbon content is between 1.80% and 3.20% . It is required by the national standard that the hardness of the high chromium type product must be no less than 58HRC, and that the impact value should be greater than or equal to 3.0J/ cm. This type of product must go through the hot quenching and the tempering treatment to come up to the hardness.

Currently at home, there are two quenching methods for this type of product including oil quenching and wind quenching. If the tested hardness of this type of product is below 54HRC, then it shows that the quenching treatment is omitted.

2. The Quality Index of the Medium Chromium Type

The medium chromium type cast iron grinding ball is defined as the chromium content ranging from 3.0% to 7.0% , and the carbon content coming between 1.80% and 3.20% . Its impact value should be no less than 2.0J/ cm. . The national standard requires the hardness of this type of product should be greater than or equal to 47HRC. For ensuring the quality, the medium chromium type product should be processed with high temperature tempering to eliminate the casting stress.

If the surface of the steel ball assumes the dark red color, it proves that the steel ball has been processed with high temperature tempering. If the surface of the steel ball still comes with the metal color, then, we can judge that the steel ball doesn’t go through the high temperature tempering treatment.

3. The Quality Index of the Low Chromium Type

Generally, the low chromium cast iron grinding ball contains the chromium with the content of 0.5% to 2.5% , and the carbon with the content ranging from 1.80% to 3.20% . Accordingly, in line with the national standard, the hardness of the type of product should be no less than 45HRC and the impact value should be no less than 1.5J/ cm. The low chromium type product also needs the high temperature tempering treatment to guarantee the quality. The treatment can eliminate the casting stress. If the steel ball has dark red surface, it has gone through the high temperature tempering treatment. If the surface still shows the metal color, the steel ball is not treated with high temperature tempering.

The cast iron grinding ball is often applied for various rod mills in large scale mine, cement plant, chemical plant, power station, quartz sand plant, silica sand factory, etc.


Company Contact:


  • Phone: 8653183809606

  • Address: Huamin Exporting Industrial Zone, Yangjun Village,, Zhangqiu, China

  • Email: Email


Published date: May 17, 2016 -

  • Business Description: Based on the village of blacksmith, rooted in Confucius charm, Shandong Huamin Steel Ball Joint-stock Co., Ltd. is formerly known as "The First Steel Ball Factory of Zhangqiu County ". 30 years of grinding media manufacturing experience and innovation spirit makes him more great-hearted, energetic and powerful!Our company was founded in 1986, 1993-2003 being as a joint-venture company with a Korean enterprise. In 2004 we restructured into a stock corporation. Grinding Ball (Forged & Cast), Grinding rod, Patent equipment of grinding ball and rod are our main product. Concentrating on abrasive material research and development is the final goal at present and for long!Shandong Huamin Steel Ball Joint-stock Co., Ltd covers an area about 220,000 square meters, with building area of 50,000 square meters. There are 262 existing staff, modern office environment, advanced production equipment, a number of high-quality scientific and technical personnel and management personnel. After unremitting efforts of all staff for many years, the company has established a leading position in the domestic industry of forged steel ball. Now we have two production areas, with 11 of forged steel ball production line reached and developed by ourselves; 3 automatic grinding rod production line and the design production capacity can be 150,000 tons.
    Our products are mainly exported to Chile, South Africa, Ghana and more than 30 countries and regions. Moreover, we have established strategic partnership with the China National Gold Group, China Aluminum Group, Aglogold Ashanti Company, Rio Tinto Group and other Fortune 500 companies at home and abroad.
    Our company abides by three rules: offering the best quality products to customer; depending on the power of technological innovation; and creating the No. 1 grinding media brand for Huamin .
    Huamin has successively won the Famous Brand Enterprises of Shandong Province, High-tech Enterprises of Shandong Province, the Enterprise of Observing Contracts and Keeping Promise in Shandong Province, Exports Advanced Enterprises of Zhangqiu City and Jinan City and other awards. In 2013, the company was recognized as No.1 of comprehensive strength in forged ball industry by China Forging and Pressing Association.
    Inheriting excellence to create a better future, Shandong Huamin Steel Ball Joint-stock Co., Ltd will continue to focus on customer demands and adhere to the concept of "one family, one mind, one vigor," to continuously research and innovate, and bring the most advanced products to all over the world!

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