Tungsten carbide balls made of WC and binder phase Co or Ni, they are sintered into blanks after pressing. The carbide balls produced by us are taken complete virgin T.C material with properties as following:
a)Very small porosity as A02B00C00
b)High hardness at HRA90~91.5
c)Resistant to acid and alkali
d)Diameter ranging from 0.3mm to 100mm
*Content, Mechanical and Physical Performance of Tungsten Carbide Ball with Grade YG6
WC:94%
CO：6%
Density:14.9g/cm3
Hardness:HRA91.0
Ultimate Compressive Strength:4600~5800 Mpa
Young’s Modulus:650Gpa
Specific Heat:225 J/kg-K
Coefficient of Linear Thermal Expansion:5.2 10^-6/ºC
Thermal Conductivity:83.0 W/(m·K)
Electric Resistivity:180Ω*m*10^-9
*Dimensional and Profile Accuracy
(according to Din 5401)
|
Grade
|
Dw
|
tDws
|
|
|
|
IG
|
|
Size
|
Tol
|
VDws
|
Ra
|
VDwL
|
VDwA
|
ST
|
|
mm
|
mm
|
μm
|
μm
|
μm
|
μm
|
μm
|
|
above
|
Up to
|
|
max
|
max
|
max
|
max
|
|
|
G3
|
-
|
12.7
|
±5.32
|
0.08
|
0.01
|
0.13
|
-
|
0.5
|
|
G5
|
-
|
12.7
|
±5.63
|
0.13
|
0.014
|
0.25
|
-
|
1
|
|
G10
|
-
|
25.4
|
±9.75
|
0.25
|
0.02
|
0.5
|
-
|
1
|
|
G16
|
-
|
25.4
|
±11.4
|
0.4
|
0.025
|
0.8
|
-
|
2
|
|
G20
|
-
|
38.1
|
±11.5
|
0.5
|
0.032
|
1
|
-
|
2
|
|
G28
|
-
|
50.8
|
±13.7
|
0.7
|
0.05
|
1.4
|
-
|
2
|
|
G40
|
-
|
100
|
±19
|
1
|
0.06
|
2
|
-
|
4
|
|
G80
|
-
|
100
|
±14
|
2
|
0.1
|
-
|
4.0
|
4
|
|
G100
|
-
|
150
|
±47.5
|
2.5
|
0.1
|
5
|
-
|
10
|
|
G200
|
-
|
150
|
±72.5
|
5
|
0.15
|
10
|
-
|
10
|
|
G300
|
-
|
25.4
|
±70
|
10
|
0.2
|
-
|
20
|
20
|
|
G300
|
25.4
|
50.8
|
±105
|
15
|
0.2
|
-
|
30
|
30
|
|
G300
|
50.8
|
75
|
±140
|
20
|
0.2
|
-
|
40
|
40
|
|
G500
|
-
|
25.4
|
±75
|
25
|
-
|
-
|
50
|
50
|
|
G500
|
25.4
|
50.8
|
±112.5
|
25
|
-
|
-
|
75
|
75
|
|
G500
|
50.8
|
75
|
±150
|
25
|
-
|
-
|
100
|
100
|
|
G500
|
75
|
100
|
±187.5
|
32
|
-
|
-
|
125
|
125
|
|
G500
|
100
|
125
|
±225
|
38
|
-
|
-
|
150
|
150
|
|
G500
|
125
|
150
|
±262.5
|
44
|
-
|
-
|
175
|
175
|
|
G600
|
all
|
±200
|
-
|
-
|
-
|
400
|
-
|
|
G700
|
all
|
±1000
|
-
|
-
|
-
|
2000
|
-
|
*Symbols and Definitions
DW: Diameter value which is used for the general identification of a ball size.
Dws: Distance between two parallel planes tangential to the actual surface of a ball.
Dwm: Arithmetical mean of the largest and the smallest of the single diameters of a ball.
VDws: Difference between the largest and the smallest of the single diameters of a ball.
tDw: Greatest radial distance, in any equatorial plane, between the smallest circumscribed sphere and the greatest inscribed sphere, with their centers common to the least square sphere centre.
DwmL: Arithmetical mean of the mean diameters of the largest ball and the smallest ball in a ball lot.
VDwl: Difference between the mean diameters of the largest ball and the smallest ball in a ball lot.
G: Specific combination of dimensional, form, surface roughness and sorting tolerances
for balls. Ball grade is identified by the letter G and a num.
S: Amount by which the mean diameter of a ball lot should differ from the nominal ball diameter, this amount being one of an established series. Each ball gauge is a whole multiple of the ball gauge interval established for the ball grade in question. A ball gauge, in combination with the ball grade and nominal diameter, should be considered as the most exact ball size specification to be used by a customer for ordering purposes.
Ra: Surface irregularities with relatively small spacings, which usually include irregularities resulting from the method of manufacture being used and/or other influences. These irregularities are considered within the limits that are conventionally defined, e.g., whitin the limits of the sampling length.
*Applications of Tungsten Carbide Balls
Special and hydraulic precision valves, special bearings, couplers, flow meters, sprayers, recirculation balls, ball splines, tool machines, sliding rails, ballpoint pens, pin and tips for indicators, precision measurement instruments, medical instruments. They are used in naval, mining, petrol and coining industry. 
