80mm 70cr2 Hot Rolling Steel Balls
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China [CN] Breif Description:
We, Shandong Oriental Casting And Forging Co., Ltd, mainly produce grinding media for many years, with the strength of forged steel ball, cast steel ball, grinding rod and steel cylpeb. And all of our products strictly according to the ISO9001-2008 Quality Standard.
Our forging grinding balls have the specialities of higher hareness(from surface to the core),high toughness and low breakage.they can even maintain the stability under various poor working conditions.
Product Performance:
Chemical composition:
| Material | C | Mn | Si | Cr | S | P |
| 50MN | 0.48-0.56 | 0.70-1.0 | 0.17-0.37 | 0.25 max | 0.035max | 0.035max |
| 60MN | 0.57-0.65 | 0.70-1.0 | 0.17-0.37 | 0.25 max | 0.035max | 0.035max |
| 65MN | 0.60-0.70 | 0.90-1.20 | 0.17-0.37 | 0.25 max | 0.035max | 0.035max |
| 75Mn | 0.72-0.92 | 0.17-0.37 | 0.7-1.0 | 0.4-0.6 | 0.035max | 0.035max |
| 75MnCr | 0.70-0.85 | 0.7-0.8 | 0.17-0.37 | 0.2-0.7 | 0.03 max | 0.03 max |
| 75SiMn | 0.70-0.90 | 0.7-1.2 | 0.4-0.8 | 0.25 max | 0.03 max | 0.03 max |
Specifications:
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
Testing:
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
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