| Chemical composition | ||||||||
| Material | C | Si | Mn | P | S | Ni | Cr | Mo |
| 420 | 0.26-0.35 | ≤1.00 | ≤1.25 | ≤0.04 | ≤0.03 | ≤0.60 | 12.0-14.0 | - |
| 420C | 0.36-0.43 | ≤0.80 | ≤0.80 | ≤0.04 | ≤0.03 | ≤0.60 | 12.0-13.5 | - |
| 440 | 0.90-1.00 | ≤0.80 | ≤0.80 | ≤0.04 | ≤0.03 | ≤0.60 | 16.0-18.0 | 0.4-0.7 |
| 440C | 0.95-1.10 | ≤0.80 | ≤0.80 | ≤0.04 | ≤0.03 | ≤0.60 | 16.0-18.0 | 0.4-0.7 |
Grade:G10 to G1000 | |||||
Grade | Ball diameter variation | Deviation from spherical from | Surface roughness | Lot diameter variation | Nominal ball deviation tolerance |
Vdws | △Sph | Ra | Vdwl | Tdn | |
not over | |||||
μm | |||||
10 | 0.25 | 0.25 | 0.025 | 0.5 | * |
16 | 0.4 | 0.4 | 0.032 | 0.8 | * |
20 | 0.5 | 0.5 | 0.05 | 1 | * |
28 | 0.7 | 0.7 | 0.05 | 1.5 | * |
40 | 1.0 | 1.0 | 0.08 | 2 | * |
60 | 1.5 | 1.5 | 0.10 | 3 | * |
100 | 2.5 | 2.5 | 0.125 | 5 | ±12.5 |
200 | 5 | 5 | 0.5 | 10 | ±25 |
500 | 13 | 13 | * | 25 | ±50 |
1000 | 25 | 25 | * | 50 | ±125 |
1.Can you provide sample free?
Yes ,we can provide free samples with in 0.5kg.
2.What kind of payment terms you can accept?
We can accept T/T,L/C, Western Union and Paypal.
3.What about your steel ball's quality?
Checking in the whole manufacturing process &100% inspection before shipment ensure the quality of our products.
4.What's your packing method?
A) Inner packing: Dry packing or oil packing are provided according to you needs.
B) Outer packing:
1)volatile rust preventive paper + poly bag + iron drum + wooden / iron pallet.
2)25kg poly bag + carton + wooden pallet or wooden box.
3)customized packing.
5.What's your delivery time?
Within 3-30 days according to your required size and quantity.
6.Is your steel ball competitive?
Yes, We are steel ball manufacture more than 30+ years.
