• Dia 20mm-120mm grinding media steel balls
  • Dia 20mm-120mm grinding media steel balls
  • Dia 20mm-120mm grinding media steel balls
  • Dia 20mm-120mm grinding media steel balls

Dia 20mm-120mm grinding media steel balls

  • China
  • 10 Ton / Tons
  • T/T L/C
  • 10000 Ton / Tons per Month
  • 7 days
  • Qingdao
Product Details
Application:mining Material:Steel
Product Description

Key Specifications/Special Features:

  • Forged grinding steel ball

  • Material: 75MNCR

  • Size from diameter 20 to 150mm

  • Chemical composition (%): C 0.75-0.85, SI 0.17-0.35, MN 0.7-0.9 CR 0.4-0.6, AL 0.01-0.06 S/P 0.03 maximum CU 0.2 maximum NI 0.2max

  • Hardness: HRC60-65

  • Packing: by steel drums or flexible container bags

  • Grinding balls are widely used in the ball mill for mines, cement plants, power stations, chemical industries

  • It has the characters of: no breakage, good wear resistance, no deformation, uniformity of the hardness from surface to core

Chemical composition:

50MN0.48-0.560.70-1.00.17-0.370.25 max0.035max0.035max
60MN0.57-0.650.70-1.00.17-0.370.25 max0.035max0.035max
65MN0.60-0.700.90-1.200.17-0.370.25 max0.035max0.035max
75MnCr0.70-0.850.7-0.80.17-0.370.2-0.70.03 max0.03 max
75SiMn0.70-0.900.7-1.20.4-0.80.25 max0.03 max0.03 max


Impact Test


Endurance Test Times


Dia 25mm-60mmDia 70mm-100mm
75 SiMn≥16≥12000≥60≥50≥60≥48

Raw Material:

Strict quality control of steel material from BIG STEEL FACTORY GROUP.You know the good grinding balls quality depends on the good raw material.

Prodcution Line:

1.Traditional Hammer Forging: Raw material-Cutting-Heating-Forging-Quenching-Tempering-Testing-Packing

2. Hot Rolling


Quality control for each production shift (4hours/Shift);

Hardness, chemical elements and impact testing after production for each production shift;

SGS –third party testing before each delivery

Our advantage:

1. We are a direct manufacturer,located in the largest production base of forged grinding steel ball in China.We are very pleased to offer you the most competitive price.All products with high quality would pass the third party inspection before shipment.

2. The Heat treatment technology is very perfect, especially the tempeing process,which increase the hardness of the forging steel ball and nake the product more wear-resisting.

3. Our forged steel grinding ball has been exported to Japan,Indonesia,Malaysia and many other countries and have got great reputation from our customer at home and abroad.

4. Free Samples Can be Provided.

Our Services

1. Free samples for your test before orders;

2. Soonest delivery time ;

3. Cooperate with many famours shipping companies,and sent the goods to your port safe and in time;

4. Any feedback after sales would get our soonest reply.