Grinding media ball forged steel ball B2 B3 B4 B7 for ball mill and
minerals
Grinding Media Balls Chemical Elements( Below is common used type
all over the world,if you have any other different requirement,
please let me know,we can order from steel mill)
| Material | Chemical Elements |
| C | Si | Mn | P/S | Cr |
| 45# | 0.42-0.50 | 0.17-0.37 | 0.5-0.8 | <0.035 | <0.25 |
| 60MN | 0.55-0.65 | 0.17-0.37 | 0.7-1.0 | <0.04 | <0.25 |
| B2 | 0.72-0.85 | 0.17-0.37 | 0.7-1.0 | <0.04 | 0.4-0.6 |
| B3 | 0.5-0.8 | 1.0-1.8 | 0.4-1.0 | 0.035 | 0.5-1.0 |
Grinding Media Balls Hardness( Below is common used type all over
the world,if you have any other different requirement, please let
me know,we can order from steel mill)
| Material | 25mm-50mm HRC | 60mm-90mm HRC |
100mm-125mm HRC
|
| 50-55 |
| 45# | 55-58 | 55-58 |
| 60MN | 58-63 | 58-63 | 56-60 |
| B2 | 60-65 | 58-63 | 56-60 |
| B3 | | | 56-63 |
All the raw material-steel rods are produced by reputable large
scale steel mills. We can also arrange
special processing for different requirements of the steel raw
material . We use an electric furnace
to heat the raw material, in order to make sure all the materials
can reach the correct temperature
and reduce unnecessary loss during heating .
To obtain high hardness,strength,toughness and superior wear
resistance ,the forged steel balls
undergo heat treatment, water quenching, and tempering.
During the heat treatment, we use advanced Isothermal temperature
control technology, to insure
the uniformity of the hardness of the grinding balls .
Characteristics and Advantages
Properties contrast with other type grinding balls:
Description | Properties | Metallographic Structure | Falling- ball Impact Fatigue Life |
Superficial Hardness (HRC) | Ak (j/cm2) |
Grinding Ball | ≥60 | ≥7 | B+A+Carbide | ≤Φ100 | ≥18000 |
≥Φ100 | ≥15000 |
Low-Cr Ball | ≥45 | ≥2.5 | P+Carbide | >5000 |
Medium-Cr Ball | ≥47 | ≥2.5 | P+Carbide | <Φ80 | ≥13000 |
≥Φ80 | ≥6000 |
High-Cr Ball | ≥55 | ≥2.5 | M+Carbide | <Φ80 | ≥15000 |
≥Φ80 | ≥10000 |
Forging Ball | ≥47 | ≥10 | P+Carbide | | |
