The Quality Index of the High Chromium TypeThe chromium content of the high chromium type product is greater than or equal to 10.0%. And the carbon content is between 1.8% 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 3.0 J/cm2. This type of products must go through the hot quenching and the tempering treatment to come up to the hardness.
Technological Production ProcessRaw Material Inspection - Material Proportion-Intermediate Frequency Furnace Heating and Smelting - Pouring Via Steel Die-Quenching Treatment - Tempering Treatment Inspection - PackagingProduct Quality Standard and Inspection Method1. The chemical composition of the high chromium type product should conform to the below table 1. We can also manufacture the product with special chemical composition in accordance with the requirements of the customers.C2. 2. The nominal diameter, allowable deviation, maximum diameter, minimum diameter of the cast grinding steel ball should be in accordance with the following table 2.
3.The high chromium type of product can be manufactured with the mechanical properties following the requirements of customers.(table3)
| Code | Chemical Composition (Mass Fraction) |
| Cr | C | Si | Mn | Mo | Cu | V | Ti | P | S |
| ZQCrG1 | 10-16 | 2.0-3.5 | ≤1.0 | 0.5-2.5 | ≤1.0 | ≤1.0 | ≤0.3 | ≤0.15 | ≤0.1 | ≤0.1 |
| ZQCrG2 | 16-22 |
| ZQCrG3 | 22-28 |
| Nominal Diameter | 20 | 25 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Allowable Deviation of Diameter | +2.0-1.0 | +2.0-1.0 | +3.5-1.0 |
| Difference between the Maximum Diameter and Minimum Diameter | ≤1.8 | ≤2.4 | ≤3.0 | ≤3.6 | ≤4.2 | ≤4.6 |
| Code | Surface Hardness(HRC) | Impact Test(Ak) | Impact Fatigue life(Times) |
| ZQCrG1 | ≥58 | ≥3 | ≥10000 |
| ZQCrG2 |
| ZQCrG3 |
We are Shandong Huamin Steel Ball Joint-stock Co., Ltd. Our company is the biggest manufacturer of grinding media with 26 years experiences in China. We can supply high quality grinding steel ball with reasonable price, timely delivery and satisfactory service. And our company has obtained the Certificate of ISO9001 and ISO14001. The annual production output is 150, 000 metric tons. Our products are exported to more than 20 countries and regions.
Our main products are as follows:
Grinding Media
1. Forged Grinding Steel Ball
Such as:
High Manganese Forged Steel Ball
B2, B3 New Material Forged Steel Ball, etc.
2. Casting Grinding Iron Ball
Such as:
High Chrome Casting Iron Ball
Middle Chrome Casting Iron Ball
Low Chrome Casting Iron Ball, etc.
3. Grinding Steel Rod
Dia. 60-90 mm, Length 3000-6000 mm
Hardness: HRC 45-55
4. Grinding Cylpebs, etc.
For more product details please browse our website. And the customized products also can be supplied as per your requirements. They are mainly used in the ball mill for mines, cement plants, power stations, chemical industries, etc. We warmly welcome you to come to have a visit, negotiation and cooperation.
