Hiduron 130 (Hidurax Special)


Hiduron® 130 is a high-strength cupronickel supplied in the hot worked condition. Aluminium is the alloys key strengthening element through the formation of finely dispersed ϒ’ nickel aluminium precipitate, strengthening the alloy in a similar way to Alloy K-500. As these precipitates are formed through a carefully controlled forging process, naturally aged during cooling, no further heat treatment is necessary, making it one of the highest strength copper alloys commercially available.

Being a cupronickel, it has excellent resistance to corrosion by seawater and marine and industrial atmospheres and it is highly resistant to crevice corrosion. It has a very low magnetic permeability, it is virtually non-magnetic, and it has a higher modulus of elasticity than is normally associated with copper alloys. All these properties are achieved without heat treatment and are combined with good machinability and the ability to take an excellent finish.

The major use of Hiduron® 130 is in subsea hydraulic and electrical connectors such as flying lead connectors for stab plates. It is also used in naval winches, seawater valves and marine engineering generally. Additionally, it is applied in the aerospace industry for heavily stressed airframe components. Other applications include a variety of mechanical engineering and hydraulics systems amongst which are valve seat inserts and thrust washers for high performance internal combustion engines. It is covered by the specifications DIN 2.1504 and DTD 900/4805 to which it can be supplied when required.

Key Features:

  • Superior strength, general corrosion resistance and erosion/corrosion resistance compared to conventional copper nickels
  • High wear resistance
  • Excellent anti-galling properties, particularly when operating against stainless steels
  • High corrosion resistance in marine environments
  • No loss of impact strength down to -196°C facilitating cryogenic and ultra-deep subsea applications
  • Good anti-fouling properties
  • Freedom from hydrogen embrittlement
  • Low magnetic permeability
  • Good machinability


  • Naval applications such as submarine control elements, sonar equipment, tow and winch fittings
  • Marine pump shafts, mechanical seals, gears, hose couplings, propeller shafts, drive bushes
  • Oil & Gas industry shafts for pumps & valves, valve spindles, hydraulic pistons, cylinders, wireline tooling, tooling bits, stems and clamps
  • Aerospace landing bearings, flight refuelling connectors
  • Process industry valve components, process control equipment
  • Electrical industry stress rings, current-carrying bolting
  • Automotive valve seat inserts and thrust washers in high performance engines

Chemical Composition:

Cr Ni Mo Co Nb (+Ta) Ti V W Cu C Mn N Si P S Fe Al
Min 13.00 0.10 0.60 2.00
Max 0.50 16.00 Bal 1.00 0.10 1.50 3.00

Mechanical Properties:

Bars up to and including 65mm (2 ½”) diameter or section Bars greater than 65mm (2 ½”) but less than 110mm (4 5/16“) diameter or section Bars greater than 110mm (4 5/16”) but less than 203mm (8”) diameter or section
0.2% Proof Stress 630 N/mm2 91.4ksi 580 N/mm2 84.1ksi 555 N/mm2 80.5ksi
Tensile Strength 850 N/mm2 123.3ksi 770 N/mm2 111.7ksi 770 N/mm2 111.7ksi
Elongation, 5.65√S0 10% 10% 10%
Hardness (Brinell) >240 >229 >229
Impact Strength (Room Temp) >14J > 14J >14J


  1. Testing shall be carried out in accordance with ASTM A370 or EN ISO 6892-1 (tensile), EN ISO 6506-1 (hardness)
  2. Minimum properties quoted (tested at room temperature in a longitudinal direction)
  3. Testing performed on each melt of material per heat treatment batch

Physical Properties:

Density (Kg/m3) 8500
Magnetic Permeability (20°C) < 1.01
Young’s Modulus (kN/mm2) 141
Modulus of Rigidity (kN/mm2) 52
Electrical Conductivity, 20°C (mΩ/mm2) 1.71 (10% IACS)
Mean coefficient of thermal expansion, 20-300°C (m/m/degC) 16.4 x 10-6
Specific Heat, 20°C (J/kg.K) 435
Thermal conductivity, 20°C (W/m.K) 46


Datasheet - CA-Hiduron 130

Datasheet - CA-Hiduron 130

Brochure - Hiduron 130 - Detailed product information (rev2)

Brochure - Hiduron 130 - Detailed product information (rev2)