Alloy 625

Alloy 625 is a Nickel-Chromium alloy used for its high strength, excellent fabricability and outstanding corrosion resistance. Service temperatures range from cryogenic to 1800 ̊ F. Alloy 625 strength is derived from the stiffening effect of molybdenium and columbium on its Nickel-Chromium matrix; thus precipitation-hardening treatments are not required. This combination of elements also is responsible for superior resistance to a wide range of corrosive environments of unusual severity as well as to high-temperature effects such as oxidation and carburization.

• Outstanding resistance to pitting, crevice corrosion, impingement corrosion and intergranular attack.
• Almost complete freedom from Chloride- induced stress corrosion cracking.
• Good resistance to mineral acids, such as nitric, phosphoric, sulphuric and hydrochloric acids.
• Good resistance to alkalis and organic acids.
• Good mechanical properties.

• Used for structures in contact with seawater and subject to high mechanical stresses
• Flue gas scrubbers components
• Chimney linings
• Superphosphoric acid production equipment
• Sour gas production tubes
• Offshore industry, marine equipment
• High tensile, creep, rupture strength, outstanding fatigue and thermal-fatigue strength; oxidation resistance; and excellent weldability and brazeability make it a good choice in the aerospace industry

KSI can be converted to MPA (Megapascals) by multiplying by 6.895.