Monel 400: Monel 400 commonly knowns as alloy 400, Monel is Nickel copper alloy. Monel400 is covered by the following standards: BS 3075, 3076 NA 13, DTD 204B, and ASTM B164. Monel 400 or UNS N04400 is high strength, excellent corrosion resistance, good ductility, and thermal conductivity copper nickel alloy. UNS N04400 is frequently used in heat exchangers, valves, marine engineering, chemical, and hydrocarbon processing, Oil & Gas Equipment.

Monel 401: UNS N04401 or 401 is widely used in specialized electric and electronic industry. Nickel alloy N04401 has good weldability by the gas-tungsten-arc process and good brazing characteristics. Resistance welding is a very satisfactory method for joining the material. Alloy 401 is covered by standard UNS N04401.

Monel 404: UNS N04404 widely known as nickel alloy 404. The composition of Monel 404 is carefully adjusted to provide a very low Curie temperature, low permeability, and good brazing characteristics. Common welding and forging techniques can be used for Monel 404 but it cannot be hot worked. For a better finish, cold working can be performed. Widely used in capsules for transistors and ceramic to metal seals, Monel 404 is covered by standards UNS N04404 and ASTM F96

Monel 405: UNS N04405 bitterly knowns as Nickel alloy 405. Monel 405 Mainly used for automatic screw machine stock, Monel 405 is designated as UNS N04405 and is covered by ASME SB-164, ASTM B-164, Federal QQ-N-281, SAE AMS 4674 & 7234, Military MIL-N-894, BS3072NA18, BS3073NA18, QQ-N-286, DIN 17750, ISO 6208, BS3075NA18, BS3076NA18, ASTM B 865, DIN 17752, DIN 17753, DIN 17754, QQ-N-286, SAE AMS 4676, ASME Code Case 1192, ISO 9723, ISO 9724, ISO 9725, BS3074NA18, DIN 17751 & NACE MR-01-75. It is a free-machining grade of alloy 400. The amount of sulfur is increased to 0.025-0.060% which creates nickel-copper sulfides increasing the machinability.

Monel K500: UNS N05500 is also known as K500 Monel Grade. Monel K500 having additions of aluminum and titanium to the nickel-copper which provides better corrosion resistance. Monel K500 possessing greater strength and hardness along with excellent corrosion resistance properties. However, alloy K-500 has a greater tendency toward stress-corrosion cracking in some environments in age-hardened conditions. Monel K500 is particularly suitable for shafts of centrifugal pumps in marine service. Typical applications for alloy K-500 are instruments, oil-well tools, electronic components, marine propellers, pump shafts, rotary impellers, doctor blades, scrapers, and oil-well drill collars, Oil & Gas processing equipment, Nuclear Industry applications.