Admiralty Brass Tube

Admiralty Brass Tubes are generally used with fresh, clean waters free from suspended abrasive solids and originating from rivers lakes and canals. It may also be used with brackish or even saline water. The inhibitive action of arsenic protects Admiralty Brass Tubes from dezincification and the fully annealed alloy can also withstand stress-corrosion cracking. In waters containing less than 2000 ppm dissolved solids its use is allowed at flow rates of up to 3 m/s (10 ft/s) in sea waters a maximum speed of 1 m/s (3,0 ft/ s) is recommended. The presences of tin improve resistance to general corrosion in slightly polluted (sulphurised) water.

Specifications:

Admiralty Brass Tubes
  • ASTM B 111 C 44300
  • ASME SB 111 C 44300
  • BS 2871 Part 3 CZ – 111
  • EN 12451 CuZn28 Sn1As
  • NFA 51 102 CuZn29Sn1
  • JIS H 3300 C 4430
Chemical Requirements 
Copper70.0 to 73.0%
Tin0.8 to 1.2%
Arsenic0.02 to 0.06%
ZincRemainder
Lead0.07% max.
Physical Properties 
ConditionHardness
Annealed (O)75 max
Temper Annealed (TA)80 to 105
As manufactured (M)150 min.
Further Tests
Drift Test
Flattening Test
Microstructure Test
MN Test
Eddy Current Optiona
Hydraulic Testl
Uses
Dezincification resistant brass, used in fresh water generally used in petroleum industry because of good corrosion resistant to sulphur bearing gases and cooling water.

Admiralty Brass Tube

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