What Is The Difference Between 90-10 And 70/30 Copper Nickel Valve?

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Copper and nickel come in a variety of grades to meet these properties. Copper and nickel grade is well known for their long-term performance in corrosive environments. Cupro Nickel 70-30 Valves oxidation resistance, the ability to oppose rusting and resist growth on its surface, has been ideal and successfully used for marine applications. However, the finest qualities for marine applications are provided by the combination of Copper Nickel 90/10 and 70/30. The 90/10 and 70/30 alloys have historically been utilized in the construction of ships. In seawater applications, they are, therefore, frequently used.

Cupro Nickel 70-30 Valves

Cupro Nickel 70-30 Valves have Iron, and manganese are also present, comprising 70% copper and 30% nickel. The composition of these elements makes them more resistant to abrasion and corrosion. Moreover, this grade offers good corrosion resistance & performs well in water moving at a high rate. Due to its marginally increased strength, 90/10 is typically used in long-term engineering applications.

Cupro Nickel 90-10 Valves

Cupro Nickel 90-10 Valves is a more affordable alternative to the 70/30 copper-nickel composition. To boost resistance to impingement corrosion, abrasion, and lowering corrosion, these also contain 1% iron in their composition. These maintain their strength well at both low and high temperatures.

What Distinguishes 90/10 Copper Valves from 70/30 Copper Valves?

The 90-10 alloy offers good service at a lesser cost and is the more popular of the two alloys. The 30% nickel alloy is more formidable and can resist higher saltwater velocities in some situations.

90/10 Copper Valves from 70/30 Copper Valves Benefits

  • Toughness and High ductility Copper Nickel valves 
  • Excellent resistance to erosion
  • Inherent resistance to biofouling
  • Excellent corrosion in seawater
  • Suitable welding & fabrication properties

Properties of Copper Valves 90/10 and 70/30

  • Copper-nickel alloys have excellent resistance to marine corrosion, strength and durability.
  • Aside from being very corrosion-resistant to seawater, copper-nickel alloys are very thermally stable.
  • Low-temperature co-efficient of electrical resistance.
  • Adding nickel to copper improves strength and corrosion resistance without reducing good ductility. 

Applications of Copper Valves 90/10 and 70/30

  • Pipes for seawater
  • Firewater systems offshore
  • Condensers and heat exchangers
  • Fluid power systems
  • Aquaculture fish cages
  • Units for desalination