Glass, brass and other balls

  • Glass

SiO2 70.9, Al2O3 0.1, CaO 11.9, Na2O 8.9, K2O 7.3

Used for applications where chemical resistance, high electrical insulation performance and high hardness is required. This type is soda glass but lead glass and boro silicate are available.
Hardness Mohs 6


 

  • Phosphor Bronze

PB102 CDA-464 SAE C-464000, Cu 92-94%, Sn 6-8%

Good corrosion resistance, widely used as an electrical conductor.
Hardness HRb 75-98
 

  • Brass

Cu 59/65, Zn 35/37
Good corrosion resistance in ambient air and sea water, unstable in acid and alkalis.
Hardness HB 75
 

  • Aluminium

Al 99, Cu 0.15, Mn 0.05, Zn 0.1
Low weight, good electrical and heat conductivity, high corrosion resistance but low mechanical strength (Duralumin is hardenable to HB 105).
Hardness HB 43
 

  • Hastelloy C

Ni 57, Cr 16.5, Mo 17, W 4.5, Fe 5
Used in place of high speed steels when high temperatures are involved - stable up to 1040oC (1900oF).
Hardness HB 241
 

  • Phenolic resin

Density: from 1.30 to 2.40 g/cm3
Hardness: H77-90 Rockwell
Low cost material with good mechanical properties. High gloss finish. Excellent colorability.
 

  • Polyester

Density: from 1.23 to 1.47g/cm3
Hardness: H50 Rockwell
Same as above, but lighter and excellent colour matching possibilities. Dimensional stability.
 

  • Polycarbonate

Density: 1.20g/cm3

Hardness: R110-120 Rockwell
Exceptionally high impact, tensile, shear and flexural strength. High transparency. Good electrical insulation properties.
 

  • Polyamide

Density: from 1.38 to 1.45 g/cm3
Hardness: M109-119 Rockwell
 

  • Rockbit balls

For chilling applications. Find most frequent use in oil field equipment and offshore operations.