Krishna Engineering Industries

Alloy Name
UNS C12000
JIS C1201

We are producing varied range of copper cold rolled products with highest purity in various in chemical compositions, sizes and specifications, which are suitable for various final processing and finish products. .

Cu - DHP Characteristics

Cu-DHP is a phosphorus-deoxidized copper with a limited, medium Amount of residual Phosphorus. It has a good electrical conductivity and excellent welding and soldering properties. It can be formed excellent, either hot or cold.

Chemical Composition Weight percentage
Cu 99.80 Min %
P 0.15-0.04 %

Main Applications
Industrial :

Tubing, LP Gas Service, Conductors, Resistance Welding Equipment, Welded Tube, Medical Gas- Oxygen

Other :

Applications Requiring Welding or Brazing, Apparatus industry

Physical Properties Typical values in annealed temper at 20 °C
Density 8.94 g/cm3
Thermal expansion coefficient -191 .. 16 14.1 10-6/K
Specific heat capacity - 0 .. 300°C 17.7 10-6/K
Thermal conductivity 0.386 J/(g•K)
Electrical conductivity (1 MS/m = 1 m/(O mm²) 350 W/(m•K)
Electrical conductivity (IACS) 52.2 MS/m %
Thermal coefficient of electrical resistance (0 .. 200 C) 3.6 10-3/K
Modulus of elasticity ( 1 GPa = 1 kN/mm²) cold formed 118 GPA

Corrosion Resistance

Resistant to: Atmospheric corrosion: formation of the a greenish protective patina due to the formation of copper basic salts (such sulphates, chlorides in marine environment, nitrates and carbonates). Cu-DHP has a good resistance in natural and industrial atmosphere. Industrial and drinking water, aqueous and alkaline solutions (not oxidizing), pure water vapor (steam), non oxidizing acids (without oxygen in solution) and salts, neutral saline solutions. Practically resistant against stress corrosion cracking .

Mechanical Properties (EN 1652)
Temper Tensile Strength Rm MPa
Yield Strength Rp0.2 MPa
Elongation A50mm % Hardness HV
O (SOFT) 210 Min 35 Min 60 Max
HB (half Hard) 240 min 180 10 Min 70 to 95
HD (Hard) 290 min 250 4 Min 90 min