Cast Iron Grinding Balls - Cast Iron Grinding Balls

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Cast Iron Grinding Balls

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.

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Shandong Huamin Steel Ball Joint-stock Co., Ltd.

Address: Huamin Exporting Industrial Zone, Yangjun Village, Guanzhuang Town, Zhangqiu City, Shandong Provionce, China, Zhangqiu, Shandong, China, 250200
Tel: 86-531-83809606
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.

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