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Gun Metal

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Gun metal or red brass is the alloy with a combination of zinc, tin and copper. The alloy is used while casting machine parts for heavy industrial applications as it is resistant to corrosion. It is used for making marine components because of its ability to repel corrosion from salt and steamed water.
Specification

Range of alloys Chemical Composition% Mechanical Properties Properties and Uses
Cu Sn 10 Zn Pb
(Rg-10)
Cu 86,0-89,0
Sn 9,0-11,0
Zn 1,0-3,0
G:
Rm* 260
Rp0,2* 130
A5* 15
HB* 75
  • Bearings
  • Bushings
  • Pump impellers
  • Piston rings
  • Valve components
  • Seal rings
  • Steam fittings
  • Gears
Cu Sn 7 Zn Pb
(Rg-7)
Cu 81,0-85,0
Sn 6,0-8,0
Zn 3,0-5,0
Pb 5,0-7,0
GC:
Rm* 270
Rp 0,2* 120
A5* 16
HB* 70
  • Good hardness strength and wear resistance with excellent anti-friction qualities
  • Alloy has reasonable corrosion resistance to seawater
Cu Sn 5 Zn Pb
(Rg-5)
Cu 84,0-86,0
Sn 4,0-6,0
Zn 4,0-6,0
Pb 4,0-6,0
G:Rm* 220
Rp 0,2* 90
A5* 16
HB* 60
  • Pump components
  • Small gears
  • Water impellers
  • Marine fittings
  • Flanges
  • Plumbing fixtures
  • Ornamental fixtures
Continuous Cast
Rm Tensile strength in N/mm2
Centrifugal Cast
Rp 0,2 Yield stress in N/mm2
Sand Cast
A5
HB
Hardness Brinell

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