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Alloy K500 – High Strength Nickel Copper Alloy

Alloy K500 is a nickel-copper alloy, precipitation hardenable through additions of aluminum and titanium. This alloy shows the corrosion resistant characteristics of grades such as Alloy 400 but with enhanced strength and hardness after precipitation hardening. However, it can be further strengthened by cold working before the precipitation hardening.

We supply Alloy K500 material in both the Cold worked and Hot Worked and Aged condition to offer the best combination of excellent mechanical properties from sub-zero temperatures up to about 480°C, together with very good corrosion resistance in both marine and chemical environments.

These properties, plus the fact that it is non-magnetic, make it eminently suitable for use as propeller and pump shafts, and pumps and valves components used in the manufacture of perchlorethylene, chlorinated plastics, and in marine applications where high strength and corrosion resistance are required.

Alloy K500 Stock

We stock and supply K500 round bar to the following specifications:

  • BS 3076-89 NA18
  • UNS N05500
  • ASTM B865-04
  • QQN-286
  • NACE MR0175 / ISO 15156-3 2003

Broder Metals Group stock the following sizes:

Cold Worked & Precipitation Treated
12.7 mm 15.875 mm 19.05 mm
Hot Worked, Solution Treated and Precipitation Treated
12.7 mm 15.875 mm 19.05 mm 22.23 mm 25.4 mm
31.75 mm 34.93 mm 38.1 mm 41.275 mm 44.45 mm
47.625 mm 50.8 mm 57.15 mm 63.5 mm 69.85 mm
76.2 mm 88.9 mm 90 mm 101.6 mm 127 mm
139.7 mm 152.4 mm 300 mm

Alloy K500 Technical Data

Nominal Chemical Composition by Percent:

Ni Al C Fe Mn Si Ti S Cu
Min 63.00 2.30 0.00 0.00 0.00 0.00 0.35 0.00 27.00 %
Max 3.15 0.18 2.00 1.50 0.50 0.85 0.01 33.00 %

We supply material with Nickel at 63% minimum (including not more than 2% cobalt)

Heat Treatment

Solution Treat Age Harden
Temp(°C) Time Cooling Method Temp(°C Time Cooling Method
980-1038 Suitable to ensure all material heated to solution treat temperature Water 595 6-16 hours Furnace to 480 °C at rate between 10-14 °C per hour

Mechanical Properties

Cold Worked & Precipitation Treated

Size Tensile Strength min Yield Strength (0.2% offset) min Elongation in 2″ or 4D Reduction in Area Hardness
Ksi min MPa min Ksi min MPa min % min % HRC HB (3000 Kg)min
<=25.4 mm 145 1000 110 760 15 Reported 32-35 300

Hot Worked, Solution Treated and Precipitation Treated

Size Tensile Strength min Yield Strength (0.2% offset) min Elongation in 2″ or 4D Reduction in Area Hardness
Ksi min MPa min Ksi min MPa min % min % HRC HB (3000 Kg)min
<=108.0 mm 130 900 90 620 20 35 25-35 253-327
>108.0 mm 130 900 90 620 17 35 25-35 253-327

Values for hot worked, solution treated and precipitation treated are in accordance with our own purchasing specification and not ASTM B865.

Nickel Alloy K500 Information Sheet