VDM® Powder 625

Alternative and trade names
VDM® Powder 625
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Description

2.4856 (NiCr22Mo9Nb) is the powder variant of a nickel-chromium-molybdenum-niobium alloy for use in additive manufacturing with excellent resistance to a variety of corrosive media and characterized by the following features and properties:


  • Spherical particles
  • High purity
  • Low oxygen content
  • Equivalent Materials

    This material data has been provided by VDM Metals.

    All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
    Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

    Ashby charts

    Properties

    General

    PropertyTemperatureValueComment

    Density

    23.0 °C

    8.47 g/cm³

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    Porosity

    0.5 %

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    max., <10μ (pore area)

    Dimension

    PropertyValue

    Dimensions

    According to the AM process requirements of our customers, VDM® Powder 625 is available in a wide range of particle fractions from 10 to 250 μm. Standard particle fractions: 10-53µm, 53-150µm

    Thermal

    PropertyValue

    Melting point

    1290 - 1350 °C

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    Chemical properties

    PropertyValueComment

    Aluminium

    0.4 %

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    max.

    Carbon

    0.03 %

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    max.

    Chromium

    21 - 23 %

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    Cobalt

    1 %

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    max.

    Iron

    5 %

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    max.

    Manganese

    0.5 %

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    max.

    Molybdenum

    8 - 10 %

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    Nickel

    58 - 71 %

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    Niobium

    3.2 - 3.8 %

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    Nb+Ta

    Oxygen

    0.03 %

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    max.

    Phosphorus

    0.01 %

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    max.

    Silicon

    0.4 %

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    max.

    Sulfur

    0.01 %

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    max.

    Tantalum

    3.2 - 3.8 %

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    Nb+Ta

    Titanium

    0.4 %

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    max.

    Technological properties

    Property
    Application areas

    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. 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 gases

    Corrosion properties

    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 and 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.

    Other

    VDM® Alloy 625 has a cubic face centered lattice.