Lork Group high-quality Inconel 725 (UNS N07725) is a nickel-chromium alloy with significant additions of molybdenum, niobium and titanium. Can be supplied in the hot worked, annealed and age-hardened conditions.

Lork Group high-quality Inconel 725 (UNS N07725) is a nickel-chromium alloy with significant additions of molybdenum, niobium and titanium. Can be supplied in the hot worked, annealed and age-hardened conditions. Alloy 725 is age-hardened to achieve extremely high strength, approximately twice that of Alloy 625 in the annealed condition. This is through the precipitation of the ϒ" phase during a controlled heat treatment process.

As this high strength is achieved by ageing rather than cold working, it retains excellent ductility and toughness, and this approach is useful for large or non-uniform sections that cannot be strengthened through cold working.

Alloy 725 has very similar corrosion resistance to Alloy 625, and so is utilised in a wide range of very corrosive environments. The high nickel content ensures resistance to stress corrosion cracking, combined with molybdenum to strongly resist reducing environments such as sulphuric and phosphoric acids, chromium to resist oxidising environments such as nitric acid, titanium to inhibit intergranular corrosion, and overall resistance to pitting and crevice corrosion.

• Suitable for use in highly corrosive sour oil and gas wells, approved under NACE MR 1075
• Excellent corrosion resistance in a wide variety of corrosive environments including seawater and industrial acids
• Age hardened for extremely high strength
• Good ductility and toughness
• Excellent resistance to stress corrosion cracking

Bar and Wire: ASTM B805, ASME Code Case 2217

Bar and Forging Stock SMC: HA91, ASME Code Case 2217

• Downhole equipment for corrosive/sour service
• Oil and gas hangers, connectors
• Fasteners, especially in marine applications
• Chemical process equipment
• Agitators
• Valve stems

Send Inquiry Now