| Price: | US $ 790-1500/Ton |
|---|---|
| Trade Terms: | FOB,CIF,EXW |
| Min Order: | 1/Ton |
| Pay Type: | L/C,T/T,Western Union |
1. The standard chemical components of casting steel ball.(We can also produce the steel ball according to the requirement of customers) |
Code | Chemical Composition(Mass Fraction),% | |||||||||
C | Si | Mn | Cr | Mo | Cu | V | Ti | P | S | |
ZQCrG1 | 2.0-3.5 | ≤1.0 | 0.5-2.5 | 10-16 | ≤1.0 | ≤1.0 | ≤0.3 | ≤0.15 | ≤0.1 | ≤0.1 |
ZQCrG2 | 16-22 | |||||||||
ZQCrG3 | 22-28 | |||||||||
2. Nominal diameter, allowable deviation, the maximum diameter and the minimum diameter | ||||||||||
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 of the maximum diameter and the minimum diameter | ≤1.8 | ≤2.4 | ≤3.0 | ≤3.6 | ≤4.2 | ≤4.6 | ||||
3. Mechanical Property of casting steel ball |
Code | (HRC)Surface hardness | Impact test Ak | Impact fatigue life(N) |
ZQCrG1 | ≥58 | ≥3 | ≥10000 |
ZQCrG2 |
ZQCrG3 |
Notes:1. The ball with diameter 100mm is used in impact fatigue test; the test height is 3.5m; the impact times of the ball with other diameter are calculated by this formula, Nx=N*100/D, N is time. 2. The impact toughness and impact fatigue life index is not treated as delivery basis. |
Surface Quality |
1. It is not allowed that crack, obvious porosity, slag inclusion, shrinkage, cold insulation, wrinkled skin and other casting defects exist on the surface. |
2. Allowed defects on ball surface |
Nominal diameter | Allowed defects limitation mm | |||||
Extra part of Gate | Sand area | Residual Side | Depth | Single hole area | Total area | |
20-35 | 1.5 | 16 | 1.5 | 1.5 | 12 | 25 |
40-60 | 2.0 | 25 | 2.0 | 2.0 | 16 | 35 |
70-100 | 2.5 | 36 | 3.0 | 2.5 | 20 | 50 |
Internal quality |
| It is not allowed that crack, obvious porosity, slag inclusion, shrinkage, cold insulation, wrinkled skin and other casting defects exist on the section which goes through center of gate and sphere. |
Test Method and Rules |
1. Impact test: cutting 10mm×10mm×55mm part through gate in ball as sample |
2. Rockwell hardness specimen preparation: The surface of the ball takes the test after grinding to platform, and the grinded thickness is 1.5 - 5mm. |
3. Chemical composition test: when the volume smelting furnace more than 0.5 tons, we should check the chemical composition furnace by furnace; when the volume smelting furnace not more than 0.5 tons, we should check the chemical composition once per shift. Once there is one furnace unqualified, we need to sample double furnace for test. If there is still one not qualified, this branch of balls is unqualified. |
4. Surface hardness test: sampling from different location of each batch of heating furnace, the number of the ball≥ 5.Once there is one unqualified, we need to sample double balls for test. If there is still a ball not qualified, this branch of balls is unqualified. |
5. Internal quality detection: we sample 1 largest size casting iron grinding ball in 100 tons the same type cast iron grinding ball of each continuous production. Once there is one unqualified, we need to sample double balls for test. If there is still a ball not qualified, this branch of balls is unqualified. |
| Prod Model: | 20-100mm |
|---|---|
| Markets: | North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe |
| Certificate: | ISO9001, CE |
| Ball Color: | Black |
| Application: | Ball Mill |
| Manufacture Time: | 10 Days |
| Spare Parts Supply: | Long Term |
| After Sale Service: | Long Term |
| Processing Type: | Rolling Type |
| Material: | Casting Steel |
| Size: | 20-100mm |
