VDM® Alloy 625 (2.4856/N06625)
VDM® Alloy 625 is a nickel-chromium-molybdenum-niobium alloy with excellent resistance to a variety of corrosive media.
Characteristics of VDM® 625
VDM® Alloy 625 (2.4856/N06625) in the soft annealed condition (grade 1) is characterized by:
- Exceptional resistance to pitting, crevice corrosion, erosion and intergranular corrosion
- Immunity to chloride-induced stress corrosion cracking
- Good resistance to mineral acids such as nitric, phosphoric, sulfuric and hydrochloric acid
- Good resistance to alkalis and organic acids
- Good mechanical properties
Applications of VDM® Alloy 625
The soft annealed version of VDM® 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
- Sea water 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
VDM® FM 625 is used as a 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
Available product forms
You will find a detailed list about available product forms and sizes of VDM® Alloy 625 (2.4856/N06625) in our data sheet.
Additional information and links
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