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Duplex stainless steels

Osprey® 2507

Osprey® 2507 is a super-duplex stainless steel with excellent resistance to SCC and very high resistance to pitting and crevice corrosion. It has high resistance to general corrosion and very high mechanical strength.

UNS
S32750
EN Name
X 2 CrNiMoN 25-7-4
EN Number
1.4410
SS
2328

Powder designed for

  • Additive Manufacturing (AM)
  • Hot Isostatic Pressing (HIP)
  • Metal Injection Moulding (MIM)

This metal powder is manufactured by Inert Gas Atomization (IGA), producing a powder with a spherical morphology which provides good flow characteristics and high packing density.

Technical data

Page updated Jul 17, 2023 1:39 PM CET (supersedes all previous editions)

Download datasheet PDF

  • Chemical composition (nominal), %

    Fe
    Bal.
    Cr
    25
    Ni
    7
    Mo
    4
    C
    ≤0.030
    Si
    ≤0.8
    Mn
    ≤1.2
    P
    ≤0.025
    S
    ≤0.015
    N
    0.3
    Other
    Cu 0.5
  • Powder characteristics and morphology

    Powder for Additive Manufacturing

    Osprey® metal powder for Additive Manufacturing is characterized by a spherical morphology and high packing density, which confer good flow properties. For powder bed processes these are essential when applying fresh powder layers to the bed to ensure uniform and consistent part build.

    For blown powder processes, such as Direct Energy Deposition (DED), good flow ensures uniform build rates. Tight control of the particle size distribution also helps ensure good flowability. Low oxygen powders result in clean microstructures and low inclusion levels in the finished parts.

    -53 +15 µm powder with a spherical morphology -53 +15 µm powder with a spherical morphology,Smooth surface and low level of powder satellites Smooth surface and low level of powder satellites.Captions=Powder in cross-section, in back scatted electron mode, highlighting the fine cellular structurePowder in cross-section, in back scatted electron mode, highlighting the fine cellular structure.

    Powder for Hot Isostatic Pressing (HIP)

    Osprey® HIP powder has a spherical morphology, resulting in high packing density. In addition, the powder has a low oxygen content and low impurity levels, resulting in a metallurgically clean product with enhanced mechanical performance.

    Powder for Metal Injection Moulding (MIM)

    Osprey® MIM powder has a spherical morphology, resulting in high packing density. This enables the manufacture of feedstocks with high powder loading, which not only minimizes binder costs but also reduces part shrinkage during debinding and sintering. Spherical powder also has excellent flow characteristics, resulting in reduced tool wear and consistent mould filling.

    Osprey® MIM powder's low oxygen content allows better control of carbon and consistency during sintering. Low oxygen levels, together with high packing density, also facilitate faster sintering.

     

  • Particle size distribution

    Powder for Additive Manufacturing

    Osprey® metal powder for Additive Manufacturing is available in a wide range of particle size distributions that are tailored to the individual Additive Manufacturing systems. They can also be tailored to the particular requirements of the end application, both in terms of mechanical performance and surface finish.

    Typical particle size distributions for Additive Manufacturing.

    Typical particle size distributions for Additive Manufacturing
    Process technology Size (µm)
    Binder jetting ≤ 16, ≤ 22, ≤ 32, ≤ 38, ≤ 45
    Laser - Powder Bed Fusion (L-PBF) 15 to 53 and 10 to 45
    Electron beam - Powder Bed Fusion (E-PBF) 45 to 106
    Direct Energy Deposition (DED) 53 to 150

    Powder for Hot Isostatic Pressing (HIP)

    Osprey® powder for Hot Isostatic Pressing (HIP) is available in a broad size range, typically <250 microns, resulting in a high packing density and tap density. Low oxygen levels, together with high packing density, also facilitate faster sintering.

    Powder for Metal Injection Moulding (MIM)

    Osprey® metal powder for Metal Injection Moulding (MIM) is available in a wide range of particle size distributions, from under 5 μm up to 38 μm. The table shows our standard particle size distributions for MIM powders.

    Typical particle size distributions for Metal Injection Moulding (MIM)*
    Size (μm) D10 (μm) D50 (μm) D90 (μm)
    ≤ 38 5.5 13.0 31.0
    ≤ 32 5.0 12.0 29.0
    80% ≤ 22 4.5 11.5 27.0
    90% ≤ 22 4.0 10.5 22.0
    90% ≤ 16 3.5 8.0 16.0

    * Particle size measurements performed using a Malvern laser particle size analyzer, typical D10, D50 and D90 provided.

    Tailor-made particle size distributions are available on request. Contact us to discuss your specific requirements.

  • Microstructure

    A suitable heat treatment is carried out on the as-built parts in order to achieve the desired austenitic and ferritic microstructure in the final parts. Typically solution annealing between 1,040–1,110 °C (1,904–2,030 °F) followed by air or water cooling is performed.

    Micrographs of Osprey® 2507

    As-built vertical section of the test specimen with near full dense part with 99.9% + relative density As-built vertical section of the test specimen with near full dense part with 99.9% + relative density.EBSD image indicating phase balance and microstructure in the material after suitable heat treatment EBSD image indicating phase balance and microstructure in the material after suitable heat treatment.

  • Mechanical properties

    Typical mechanical properties of material produced by Laser - Powder Bed Fusion (L-PBF) in heat-treated condition.

    Mechanical properties, metric units
    Direction Temperature (T), °C Yield strength (Rp0.2), MPa Tensile strength (Rm), MPa E-modulus, GPa Elongation (A), %
    Horizontal 20 627 956 207 39
    Vertical 20 626 923 202 43
    Horizontal 100 548 878 205 33
    Vertical 100 546 854 205 36
    Horizontal 200 505 823 196 30
    Vertical 200 504 797 195 31
    Horizontal 300 517 857 190 30
    Vertical 300 505 832 190 31
    Mechanical properties, imperial units
    Direction Temperature (T), °F Yield strength (Rp0.2), ksi Tensile strength (Rm), ksi E-modulus, ksi Elongation (A), %
    Horizontal 68 90 138 30 39
    Vertical 68 90 133 29 43
    Horizontal 212 79 127 30 33
    Vertical 212 79 123 30 36
    Horizontal 392 73 119 28 30
    Vertical 392 73 116 28 31
    Horizontal 572 74 124 28 30
    Vertical 572 73 121 28 31
    Impact strength in heat-treated condition, metric units
    Direction Temperature (T), °C Impact energy (W), J
    Horizontal –50 198
    Vertical –50 235
    Horizontal 0 237
    Vertical 0 250
    Horizontal 20 242
    Vertical 20 247
    Horizontal 50 248
    Vertical 50 263
    Impact strength in heat-treated condition, imperial units
    Direction Temperature (T), °F Impact energy (W), Ft-lb
    Horizontal –58 146
    Vertical –58 173
    Horizontal 32 174
    Vertical 32 184
    Horizontal 68 178
    Vertical 68 182
    Horizontal 122 182
    Vertical 122 194

    Hardness

    Typical Vickers Hardness (HV) levels (ASTM E92, ISO 6507-1, JIS Z2244, GB/T 4340.1) as well as HRC values, in the Laser - Powder Bed Fusion (L-PBF) heat-treated condition.

    Hardness
    HV HRC
    282 +/–8 29 +/–1

    Surface roughness

    Measured surface roughness values (ISO 25178-6, ISO25178-606, DIN EN ISO 4287, ISO 4288), Laser - Powder Bed Fusion (L-PBF) heat-treated and
    blasted condition.

    Surface roughness in blasted condition
    Ra, µm Rz, µm Sa, µm
    1.6 7.02 4.8
  • Corrosion properties

    Corrosion properties tested on the bulk material as per the ASTM G48 and ASTM G150 standards.

    Critical pitting temperature (CPT) in heat-treated condition
    Standard Temperature (T), °C Temperature (T), °F
    ASTM G48 90 194
    ASTM G150 >95 >203

    Graph showing critical pitting temperature for various materials.

  • Typical application areas

    Osprey® 2507 powder is typically used in the following areas:

    • Oil and gas industry
    • Pulp and paper industry
    • Chemical industry
    • Refineries and petrochemical plants
    • On-shore and off-shore industry

    Impeller and rotor prototypes.

  • Testing

    All Osprey® metal powders are supplied with a certificate of analysis containing information on the chemical composition and particle size distribution. Information on other powder characteristics is available upon request.

  • Packaging

    A wide range of packaging options is available, from 5kgs plastic bottles to 250kg metal drums.

    5 kg (11 lbs) Plastic bottles
    6 kg (13 lbs) Plastic bottles
    10 kg (22 lbs) Plastic bottles
    20 kg (44 lbs) Metal cans
    100 kg (220 lbs) Steel drums
    150 kg (330 lbs) Steel drums
    250 kg (551 lbs) Steel drums
    All packaging materials are suitable for air, sea and road freight.

    Contact us for more information and to discuss your packaging requirements.

Disclaimer: Data and recommendations are for guidance only, and the suitability of a powder for a specific process or application can be confirmed only when we know the actual conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Osprey® powder.

Osprey® Online

Buy Osprey® 2507 for additive manufacturing from our online store, available directly from stock.

Range of duplex stainless steel

Osprey® Standards* Fe Cr Ni Mo C Si Mn P S N Other
2507 UNS S32750 Bal. 25 7 4 ≤0.030 ≤0.8 ≤1.2 ≤0.025 ≤0.015 0.3 Cu 0.5
2205 UNS S32205 / S32205 Bal. 22 5 3.2 ≤0.030 ≤1.0 ≤2.0 ≤0.030 ≤0.015 0.18 - 2205
1.4091 EN Number 1.4091 Bal. 32-38 11-16 2.0-4.0 1.0- 1.5 ≤1.0 ≤1.0 ≤0.035 ≤0.035 0.10-0.40 W 0.5-2.0 1.4091
2707 UNS S32707 Bal. 27 6.5 4.8 ≤0.030 ≤0.5 ≤1.5 ≤0.035 ≤0.010 0.4 Co 1.0 2707
3207 UNS S33207 Bal. 32 7 3.5 ≤0.030 ≤0.8 ≤1.5 ≤0.035 ≤0.010 0.5 - 3207

* Information about more standards is available in the datasheet for the respective alloy.

For more information

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