Forged steel mill balls 120mm, 125mm for gold and copper mines

1.  Introduction of mill grinding steel ball 

 Jinan Longteng New Energy Heavy Industry Co.,Ltd has the exact dimensions of the steel ball,rounded geometry,high hardness and good mechanical properties and resistant to wear,no distortion,no cracking of excellent quality.

2. Chemical composition of mill grinding steel ball 

Steel bars and their chemical composition:

It's high quality carbon/alloy steel bars(hot rolled or continuous cast in various specifications) that are used for making grinding media.The diameter of bars should be equal to the nominal diameter of hot rolled balls.Normally,the length of each bar is 2.5-4m.

Chemical compasition of steel bars used in our plant is as follows:

C:0.5~1.0%     Cr:0.5~3.5%  Si:0.4~2.0%  Mo:≤0.5%  Mn:0.7~2.5%  Ni: ≤0.5%

The above chemical composition is adjusted according to customer's requirement,or balls with special grade appointed by customers can be produced as well.

1) High hardness: Longteng forged grinding steel ball has high hardness: surface hardness can reach to 55-67 HRC, volume hardness 56-64 HRC

2) High Impact toughness: impact toughness is more than 15 J / cm².

3) Low Broken rate:  peel fragmentation resistance property of over 20000 times. The actual breakage rate is less than 1% and close to 0.

1) How is the quality of your products?

Our products are manufactured strictly according to national and international standard, and we 

take a test on every machine before delivery.

 2) What guarantee do you provide?

 If the quality is not consistent with the description as we said or promised before you place 

order, we promise you 100% refund.

 3) How about price?

 We have our own factory and can give you the lowest price, besides, we have a policy that " for 

saving time and absolutely honest business attitude, we quote as low as possible, discount can be 

given according to quantity".