Product Description
Ball Size: 3.00mm steel ball, Special size customization is available, 
Factory/manufacturer: Supplied from KN STEEL BALL, a professional producer in China with 20 years experiene.
Ball Material: Chrome steel AISI316 Also could be stainless steel AISI52100, Gcr15, 100CR6. AISI304, AISI420, AISI440 AISI440C, And carbon steel, high carbon steel, aluminium, titanium. price vary with different mateiral.
Chrome steel AISI52100 100Cr6 Gcr15
Bearing steel balls are hardened and tempered through their entire diameter to insure uniform structure and hardness. Ball hardness is controlled within a range of HRC 60 - 67 as measured on a parallel surface.
| CHEMICAL ANALYSIS |
MECHANICAL PROPERTIES |
| Carbon |
0.98 to 1.10% |
Tensile Strength |
325,000 psi |
| Chromium |
1.30 to 1.60% |
Yield Strength |
295,000 psi |
| Manganese |
0.25 to 0.45% |
Elongation in two inches |
5% |
| Silicon |
0.15 to 35% |
Reduction in area |
8% |
| Phosphorus |
0.025% Max |
Modulus of elasticity |
29,500,000 psi |
| Sulfur |
0.025% Max |
Density |
.283 lbs./cu. In. |
| Nickel |
0.25% Max |
|
|
| Molybdenum |
0.10% Max |
|
|
Carbon Steel
| Item |
C% |
Si% |
Mn% |
P% |
S% |
Hardness |
| AISI 1010 |
0.08~0.13 |
0.30Max |
0.50Max |
0.07Max |
0.06Max |
HRC 58-64 |
| AISI 1015 |
0.13~0.18 |
0.10~0.30 |
0.30~0.60 |
0.04Max |
******** |
| AISI 1045 |
0.43~0.50 |
0.10~0.30 |
0.60~0.90 |
0.04Max |
0.05Max |
| AISI 1085 |
0.83~0.88 |
0.10~0.30 |
0.30~0.70 |
0.04Max |
0.04Max |
|
Stainless steel offer excellent corrosion resistance in organic, acid, industrial and marine environments. The non magnetic properties combined with exceptionally high toughness at all temperatures make these steels an excellent selection with many applications. AISI 316 stainless steel offers superior corrosion resistance due to the higher nickel and molybdenum content.
| Chemical Composition |
| |
302 |
304 |
316 |
| Carbon |
0.15% max. |
0.08% max. |
0.08% max. |
| Chromium |
17.00 to 19.00% |
18.00 to 20.00% |
16.00 to 18.00% |
| Manganese |
2.0% max. |
2.0% max. |
2.0% max. |
| Silicon |
1.0% max. |
1.0% max. |
1.0% max. |
| Nickel |
8.00 to 10.00% |
8.00 to 10.50% |
10.00 to 14.00% |
| Molybdenum |
- |
- |
2.00 to 3.00% |
Mechanical Properties |
| |
302 |
304 |
316 |
| Tensile strength |
90,000 - 185,000 psi |
84,000 - 185,00 psi |
84,000 - 185,000 psi |
| Yield Strength |
40,000 - 140,000 psi |
42,000 - 140,000 psi |
42,000 - 140,000 psi |
| Elongation in two inches (Annealed) |
50% |
55% |
50% |
| Modulus of elasticity |
28,000,000 psi |
28,000,000 psi |
28,000,000 psi |
| Annealed hardness (Rockwell B) |
75 - 90 |
75 - 90 |
75 - 90 |
| Cold worked hardness (Rockwell C) |
25 - 39 |
25 - 39 |
25 - 39 |
| Density |
.286 lbs./cu.in. |
.286 lbs./cu.in. |
.288 lbs./cu.in. |
440-C Stainless Steel (Martensitic) Balls AISI
440-C stainless steel balls exhibit excellent toughness and hardness properties and offer good corrosion resistance. This material is used extensively in bearing applications where precise tolerances and surface finishes are required.
|
Ball Quality Grade: G100, or other grade G10, G28, G40, G60 G80, G200 G1000, qualigy grade vary price different
Hardness: HRC35
Ball Brand: KN STEEL BALL
Application: For precsion measure meters, ball pens production, bearing production, linear slider production,mobile photo etc.
Packing: in plastic bag, then in box, then in carton, then in wooden case. Or special packing requied by client.
Delivery terms: usually 30 days for non-stocked balls. And 5 days for stocked balls
Quality certificate and material certificate would be issued before each shipping.
PPAP, Control Plan is available for bulk purchase for high precsion steel balls
Sample confirmation before payment/shipping is available, free, by KN STEEL BALL.
We have great advantage from 0.5mm to 3.5mm balls prodctuion
Ball inspection in strict control
CHINA KN STEEL BALL
Steel balls Inspection report
Specification: 3.0mm Material: 316L Stainless steel Grade: G100 Lot No. 2677
| Client |
|
Dimension |
3.00mm |
Material |
316L |
Grade |
G100 |
| Production No. |
|
Standard |
GB/T2008-2002 |
TOTAL QTY |
600000 |
TEST QTY |
8 |
| No. |
Test Items |
Unit |
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
Results |
| 1 |
Single Largest Dia |
um |
|
3.998 |
3.000 |
3.997 |
3.999 |
3.999 |
3.998 |
3.997 |
3.000 |
Pass |
| 2 |
Single Smallest Dia |
um |
|
3.998 |
3.000 |
3.997 |
3.997 |
3.997 |
3.998 |
3.997 |
3.000 |
Pass |
| 3 |
Single Average Dia |
um |
|
3.998 |
3.000 |
3.997 |
3.998 |
3.998 |
3.998 |
3.997 |
3.000 |
Pass |
| 4 |
Vdws |
um |
<=2.5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Pass |
| 5 |
Sph |
um |
<=2.5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Pass |
| 6 |
Ra |
um |
<=0.125 |
0.125 |
0.125 |
0.125 |
0.125 |
0.125 |
0.125 |
0.125 |
0.125 |
Pass |
| 7 |
HRC |
um |
|
|
|
|
|
|
|
|
|
Pass |
| 8 |
Vdwl |
um |
<= 5 |
3 |
Pass |
| 9 |
Tdn |
um |
±12.5 |
3--0.175 |
Pass |
Inspector: Fanying Check: Menghua 2021 July 11
Audited Supplier 
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