Forms
Alloy 500 Applications
Alloy K-500 is used in sea water, offshore engineering, in the chemical process and petrochemicals industry and
shipbuilding.
Typical applications are:
- Valve seals, pump sleeves and wearing rings in sea water.
- Pump shafts and propeller shafts.
- Mounting elements/fasteners, e.g. bolts in sea air and splash water zones.
- Tug rope armouring.
- Springs.
- Components of drilling equipment in the oil industry.
- Aircraft instrument components.
Alloy K-500 is a nickel-copper alloy that can be age-hardened due to additions of aluminium and titanium. It
stands out for its corrosion resistance and high strength even at elevated temperatures. The alloy is non-magnetic.
Alloy K-500 is available in cold or hot-formed condition or with subsequent heat treatment in solution-annealed or
age-hardened condition.
Alloy K-500 is characterized by:
- Excellent corrosion resistance in many applications of offshore engineering and the chemical process industry.
- Very good resistance against chloride-induced stress corrosion cracking.
- High tensile strength up to 650 °C (1,202 °F) in the age hardened condition.
- Good fatigue strength in the age hardened condition.
- Non-magnetic down to -100 °C (-148 °F).
Alloy 500 Plate Standards
| Rod Bar Forging |
17743 17752 17754 |
B 865 | MR 0103 MR 0175 ISO 15156 |
Alloy 500 Designations
| EN | 2.4375 - NiCu30Al |
| ISO | NiCu30Al3Ti |
| UNS | N05500 |
| AFNOR | NiCu30Al |
Alloy 500 Chemical Composition
| Min | 63 | 0.5 | - | - | - | 27 | 2.3 | 0.35 | - | - | - | - | - |
| Max | - | 2 | 0.18 | 1.5 | 0.5 | 33 | 3.15 | 0.85 | 0.02 | 0.01 | 0.006 | 0.006 | 0.02 |
Alloy 500 Physical Properties
| 8.5 g/cm3 (0.31 lb/in3) at 20 ℃(68 ℉) | Solution-annealed: -135 ℃(-211 ℉) Solution-annealed and age hardened: -100 ℃(-148 ℉) |
1.0015 (Maximum) |
| Specific Heat | 420/0.100 | 480/0.115 | 517/0.123 | 613/0.146 | 685/0.164 |
| Thermal Conductivity | 17.4/120.7 | 20.9/145.0 | 30.5/211.6 | 37.4/259.5 | 41.2/285.9 |
| Electrical Resistivity | 61 | 63 | 65 | 67 | 68 |
| Modulus Of Elasticity | 179/26.0 | 176/25.5 | 164/23.8 | -/- | -/- |
| Co-efficient of Thermal Expansion | -/- | 14.6/8.11 | 15.5/8.61 | 17/9.44 | 17.5/9.72 |
Alloy 500 Mechanical Properties
| Yield Strength MPa/ksi |
690/100.1 | 620/89.9 | 570/82.7 | 490/71.1 |
| Tensile Strength MPa/ksi |
1,100/159.5 | 980/142.1 | 750/108.8 | 620/89.9 |
| Elongation % |
24 | - | - | - |
Welding Alloy 500
The material can be welded using all conventional methods: GTAW (TIG), GTAW (TIG) hot wire, plasma, MIG and
submerged arc welding. The material should be in its solution-annealed condition for welding, and should be free of
scale, grease and markings. Application of the impulse technique is preferable in gas-shielded metal welding processes.
When welding the root, care should be taken to achieve best quality root protection using pure argon (argon 4.6), so that
the welding edge is free from oxides after welding the root. Root protection is also recommended for the first and, in
certain cases depending on the welded construction, also for the second intermediate layer weld after root welding. Any
heat tint must be removed, preferably using a stainless steel brush, while the welding edge is still hot.
The interpass temperature should be max. 120 °C (248 °F). After the welding and before the age hardening, it is recommended to
anneal the components between 850°C and 900°C (1,562 to 1,652 °F) with subsequent cooling down as quickly as
possible.
Filler metal
| The following filler material is recommended: Welding rods, welding wire and wire electrodes |
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