Inconel Alloy 725 (UNS N07725) is a nickel chromium molybdenum niobium alloy with high corrosion resistance and age hardening to very high strength. Its composition is similar to Inconel 625 alloy. Inconel 625 is an alloy widely used in various corrosive environments. Its strength can be improved by cold work hardening and has been used for small bolts. Inconel 725 alloy basically has the same corrosion resistance as Inconel 625 alloy, but Inconel 725 alloy is an alloy that is age-strengthened by a heat treatment process. Since the stress of Inconel 725 alloy is through heat treatment instead of cold working, the plasticity and toughness are still high, and it is suitable for making high-strength, high-corrosion-resistant parts.
Here are the common national standard designations of Inconel 725:
US standard designations: UNS N07725, AMS 5660, AMS 5832, AMS 5772, AMS 5796, AMS 5581, ASTM B805, ASTM B805, ASTM B805. European standard designations: EN 2.4668, EN 10269, EN 10272, EN 10216-5, EN 10250-4, EN 10263-4, EN 10297-2, EN 10302, EN 10312, EN 12266-1, EN 12560-6, EN 13480-3, EN 13480-5, EN 13544-2, EN 1592-4. German standard designations: DIN NiCr22Mo9Nb, DIN 2.4627, DIN 17742, DIN 17744, DIN 17752, DIN 17754, DIN 17751. Japanese standard designations: JIS NCF725, JIS G4902, JIS G4941, JIS G5502, JIS G5122. Chinese standard designations: GB/T UNS N07725, GB/T 14992, GB/T 15001, GB/T 15003, GB/T 15004, GB/T 21833.