Alloy 625 (2.4856/N06625)

The soft annealed version of Alloy 625 (grade 1) is used in the oil and gas industry, the chemical process industry, marine engineering and environmental engineering. Typical applications include:

• Equipment for the production of super phosphoric acid 
• Plants for the treatment of radioactive waste
• Production pipe systems and linings of risers in oil production 
• Offshore industry and seawater exposed equipment 
• Seawater piping in shipbuilding 
• Stress corrosion cracking resistant compensators 
• Furnace linings 

For high-temperature applications up to 1,000 °C (1,832 °F), the solution treated variant (grade 2) acc. to ASME Code for Pressure Vessels is used. Typical applications include:

• Flaring systems in refineries and offshore platforms 
• Recuperators and compensators for hot exhaust gases 

FM 625 is used as matching filler metal for corrosion-resistant coatings of less resistant steels (overlay welding). Typical applications include:

• Components in the oil and gas extraction 
• Superheater tubes in waste incineration plants