Alloy Names (as per RoHS specifications)
UNS C61400
Chemical Composition Weight percentage
Copper [Cu] 91.0 % to 92.0%
Aluminium [Al] 4.5 % to 6.5%
Nickel [Ni] 2% to 2.5%
Maganese [Mn] 0.50%
Characterists
  • Excellent corrosion resistance.
  • Very resistant to seawater corrosion.
  • Good strength.
  • Good ductility.
Main Applications
Marine & Chemical : Tube plates for condensers, evaporators and heat exchanges, cryogenic equipment, water boxes, storage tanks and pipe work, Ship-building,Corrosion Resistant Vessels, Sea Water Piping etc.
Mechanical: Environment-resistant fasteners and pump components, Bushings, Bearings, Gear parts.

Properties

Form Temper Temper Code Tensile Strength (ksi) YS-0.5% Ext (ksi) Elongation (%) Rockwell B Scale Shear Strength (ksi) Torsion Modulus (ksi) Izod (ft-Ibs) Fatigue Strength** (ksi) Ultimate Tensile Strength in Shear (ksi) Section Size (in)
Flat Products
Hard
H04 89 Typ 60 Typ 32 Typ 87 Typ 0.125
H04 85 Typ 58 Typ 35 Typ 86 Typ 0.312
H04 78 Typ 45 Typ 40 Typ 84 Typ 1
H04 80 Typ 54 Typ 38 Typ 85 Typ 48 Typ 0.5
Soft Anneal
O60 80 Typ 40 Typ 40 Typ 42 Typ 0.315
O60 80 Typ 40 Typ 40 Typ 83 Typ 42 Typ 26 Typ 0.312
O60 82 Typ 45 Typ 40 Typ 84 Typ 45 Typ 30 Typ 0.125
O60 82 Typ 45 Typ 40 Typ 45 Typ 0.118
O60 76 Typ 33 Typ 45 Typ 81 Typ 28 Typ 40 Typ 1
O60 78 Typ 35 Typ 42 Typ 40 Typ 0.59
O60 78 Typ 35 Typ 42 Typ 82 Typ 40 Typ 25 Typ 0.5
Rod
Drawn and Stress Relieved
HR50 75 Min for Standard 35 Min for Standard 30 Min for Standard 1
HR50 80 Min for Standard 40 Min for Standard 30 Min for Standard 0.5
HR50 70 Min for Standard 32 Min for Standard 30 Min for Standard 2
Hard
H04 85 Typ 45 Typ 35 Typ 91 Typ 48 Typ 0.5
H04 82 Typ 40 Typ 35 Typ 90 Typ 45 Typ 1
H04 80 Typ 35 Typ 35 Typ 88 Typ 40 Typ 6.1 Typ 60 Typ 26 Typ 2
Melting Point - Liquidus °F 1915
Melting Point - Solidus °F 1905
Density Ib/cu in.at 68 °F 0.285
Specific Gravity 7.89
Electrical Conductivity % IACS at 68°F 14
Thermal Conductivity Btu/Sq ft/ft hr/°F at 68°F 39
Coefficient of Thermal Expansion 68-572 per 10-6°F (68-572°F) 9
Specific Heat Capacity Btu/lb/°F at 68°F 0.09
Modulus of Elasticity in Tension ksi 17000
Modulus of Rigidity ksi 6400
Technique Suitability
Solderring Not Recommended
Brazing Fair
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Good
Spot Weld Good
Seam Weld Good
Butt Weld Good
Capacity for Being Cold Worked Good
Capacity for Being Hot Formed Good
Machinability Rating 20

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