Knowde Enhanced TDS
Identification & Functionality
- Technologies
- Chemical Composition
VDM® Powder 625 contains low amounts of oxygen of up to 0.03%.
- 1 = The chemical analysis may differ slightly in some elements in other specifications and contain additional elements
Features & Benefits
- Labeling Claims
- Base Chemicals Features
- Features
VDM® Powder 625 is characterized by:
- Spherical particles
- High purity
- Low oxygen content
- Corrosion Resistance
The corrosion resistance depends on the processing and heat treatment of the material. The conventionally produced VDM® Alloy 625 usually has excellent corrosion resistance to a variety of corrosive media in the soft annealed condition (grade 1):
- Excellent resistance to pitting and crevice corrosion in chloride-containing media
- Virtual immunity to chloride-induced stress corrosion cracking
- High resistance to corrosion attack by mineral acids such as nitric, phosphoric, sulfuric, and hydrochloric acid; as well as by concentrated alkalis and organic acids, both under oxidizing as reducing conditions
- Very good resistance in seawater and brackish water, even at elevated temperatures
- High resistance to intergranular corrosion after welding and heat treatment
- High resistance to erosion corrosion
In the solution annealed variant VDM® Alloy 625 (grade 2) is usually highly resistant to many corrosive gas atmospheres:
- Good resistance to carburizing and scaling under static and cyclic conditions
- Resistance to nitriding
Applications & Uses
- Applications
- Applicable Processes
- Base Chemicals End Uses
- Applications
The soft annealed version of VDM® Alloy 625 (grade 1) is used in the oil and gas industry, the chemical process indus-try, 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
The solution annealed variant of VDM® Alloy 625 (grade 2) is used for high temperature applications up to 1,000 °C (1,832 °F). Typical applications include:
- Flaring systems in refineries and offshore platforms
- Recuperators and compensators for hot exhaust gasses
Properties
- Chemical Properties
- Physical Properties
- Microstructural Properties
VDM® Alloy 625 has a cubic face centered lattice.
| Value | Units | Test Method / Conditions | |
| Aluminum Content | max. 0.4 | wt. % | - |
| Carbon Content | 0.03 - 0.10 | wt. % | DIN EN 10095 |
| Carbon Content¹ | max. 0.03 | wt. % | - |
| Cobalt Content | max. 1 | wt. % | - |
| Chromium Content | 21 - 23 | wt. % | - |
| Copper Content | max. 0.50 | wt. % | DIN EN 10095 |
| Iron Content | max. 5 | wt. % | - |
| Manganese Content | max. 0.5 | wt. % | - |
| Molybdenum Content | 8 - 10 | wt. % | - |
| Nb + Ta | 3.2 - 3.8 | wt. % | - |
| Nickel Content | 58 - 71 | wt. % | - |
| Phosphorus Content | max. 0.01 | wt. % | - |
| Sulfur Content | max. 0.01 | wt. % | - |
| Silicon Content | max. 0.4 | wt. % | - |
| Titanium Content | max. 0.4 | wt. % | - |
| Value | Units | Test Method / Conditions | |
| Density | max. 8.47 | g/cm³ | - |
| Melting Range | 1,290 - 1,350 | °C | - |
Regulatory & Compliance
- Designations and Standards
Standard Material designation
EN 2.4856 - NiCr22Mo9Nb
ISO NC22DNb UNS N06625 AFNOR NC22DNb
Packaging & Availability
- Availability
According to the AM process requirements of our customers, VDM® Powder 625 is available in a wide range of particle fractions from 15 to 250 μm.
Standard particle fractions
Particle size distribution
[μm]Oxygen content
%Porosity < 10μ (pore area)
%15-53 < 0.03
< 0.5
53-150 