Tungsten:
Balls made of this material
are used for applications requiring extreme hardness
and resistance to wear and abrasion, hard shocks and
impacts.
The applications include
special valves, flow meters, re-circulating ball bearing
screws, linear bearings and balls for ball-point pens.
They are also used often for minting, as pivots and
points of comparators. They are also used for measurements
or calibration of holes and measurement checking devices.
| |
WC |
Co |
Grade |
Hardness |
| Tungsten
Carbide |
94% |
6% |
10,25 |
1800 Hv |
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Monel:
Monel is widely used in the chemical, pharmaceutical,
maritime, oil, textile and paper industries.
It is highly resistant to (caustic) alcaline solutions,
sea water and diluted sulphuric acid.
Monel-K (500) is often used when higher hardness and
resistance are needed.
| |
N |
Fe |
Al |
Cu |
Grade |
Hardness |
| K-Monel |
65-70% |
2.00% max |
2-4% |
25-30% |
100, 200 |
280-325 Hv |
| Monel
400 |
63-70% |
2.50% max |
- |
31-50% |
100, 200 |
280-325 Hv |
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Hastelloy:
This material is universally used in valves and pumps
where the greatest resistance is required to corrosion
caused by strongly oxidising acids.
Hastelloy-C276 is resistant to strongly oxidising
agents such as chlorine, nitric, acetic, formic, phosphoric,
sulphuric and hydrofluoric acids, zinc chloride and
ammonium solutions, water-based solutions containing
chlorine or hypochlorites and acid solutions of ferric
and cupric salts.
Hastelloy-D is exceptionally resistant to any concentration
of sulphuric acid, up to its boiling point.
| |
Cu |
Tungsten |
Mo |
Fe |
Cobalt |
Ni |
Grade |
Hardness |
| Hastelloy
C 276 |
14.5-16.5% |
3-4.5% |
15-17% |
4-7% |
2.5% max. |
Balance |
100, 200 |
170-185 Hv |
| Hastelloy
B2 |
1.00 max. |
3-4.5% |
26-30% |
2 max |
1.00% max. |
Balance |
100, 200 |
170-185 Hv |
| Hastelloy
D |
1.00 max. |
3-4.5% |
15-17% |
2 max |
1.50% max. |
Balance |
100, 200 |
170-185 Hv |
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Titanium:
High Technology material used extensively in aircraft
applications because of low weight with high strength.
| |
Ti |
Grade |
Hardness |
| Titanium |
99.9% |
100,200 |
130-180 HB |
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Stellite:
Used extensively in check valves for transporting
chemicals. They have high resistance to wear, abrasion
and heat.
| |
C |
Si |
Cr |
W |
Fe |
Co |
Mn |
Mo |
Ni |
Grade |
Hardness |
| Stellite |
2-3% |
1-1.5% |
31-34% |
16.5-19.5% |
3% max. |
bal. |
1% max. |
1% max. |
3% max. |
25,100 |
600 Hv |
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Rockbit Tool Steel:
S-2 Tool Steel balls find most frequent use in oil
field equipment and offshore drilling operations.
They provide good service in withstanding the abrasion
or pulverised rock and mud slurries.
| |
C |
Si |
Mn |
Mo |
| S-2 |
0.47-0.55% |
0.90-1.10% |
0.30-0.50% |
0.30-0.50% |
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Brass:
Balls made of this material offer excellent resistance
to corrosion in general.
The most common uses include various types of industrial
pumps and valves.
Brass is resistant to corrosion caused by fuel oils,
gasoline (petrol), butane, benzene and other similar
types of corrosive chemical agents. It is also resistant
in environments where air and salt water are present.
| |
Cu |
Zn |
Grade |
Hardness |
Brass
BS 2870 - CZ 123 |
60% |
40% |
200, 500, 1000 |
180-200 HB |
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Copper:
Generally low carbon balls (either soft or case hardened)
are first copper and then nickel plated in order to
achieve good corrosion resistance at lower price than
costlier stainless steel balls.
The most common applications include cosmetics (nail
polish), stationary products (e.g. anti-drying agent
for felt pens and correction fluids), toys (flippers
and pinball tables, chinese checkers), and gadgets
in general.
| |
Ci |
Grade |
Copper
BS 2874 - C102 |
99.9% min. |
500, 1000 |
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