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Tool and high-speed steel

Osprey® MAR 55

Osprey® MAR 55 is a carbide-strengthened Ni-Co-Cr-Mo steel containing up to 0.2 wt.% C, along with Ni, Co, Mo, and Cr. It is primarily designed for excellent PBF-LB processability without the need for plate preheating, targeting tooling applications that require hardness levels above 50 HRC and wear resistance exceeding that of the 18-Ni class of maraging steels.

Powder designed for

  • Additive Manufacturing (AM)
  • Cold spray
  • Hot Isostatic Pressing (HIP)
  • Metal Injection Moulding (MIM)
  • Micro-MIM
  • Sintered metal filters and foams

This metal powder is manufactured by either induction melting under Vacuum Inert Gas Atomization (VIGA) or melting under argon prior to Inert Gas Atomization (IGA).

Technical data

Page updated Sep 16, 2024 4:53 PM CET (supersedes all previous editions)

Download datasheet PDF

  • Chemical composition (nominal), %
    C
    0.15-0.20
    N
    <0.05>

  • 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.

    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.

    Size (μm) D10 (μm) D50 (μm) D90 (μm)
    Typical particle size distributions for Metal Injection Moulding (MIM)*
    ≤ 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.

  • Mechanical properties

    Laser Powder Bed Fusion (L-PBF)

    Hardness and mechanical properties in as built condition.

    Build direction

    Ageing temperature (°C)

    Ageing time
    (h)

    Yield strength
    (MPa)

    Tensile strength
    (MPa)

    Elongation
    (%)
    Alo15 

    Hardness
    (HRC)

    Charpy V Notch
    Impact Toughness
    (J)
    MAR 55 (V) As built NA 1495 1630 17.9 48-49 60
    MAR 55 (H) As built NA 1355 1645 16.0 48-49 60
    MAR 55 (V) 480 5 1680 1870 12.0 53-54 32
    MAR 55 (H) 480 5 1600 1910 10.0 53-54 32

  • Temper resistance

    Hardness vs. Long time ageing at elevated temperatures.

  • Thermal conductivity

    Typical thermal conductivity in as built and aged condition.

  • Wear resistance

    The wear resistance of the samples was evaluated by in house chip wear tests, the severity of wear in MAR55 is significantly lower than that of 18Ni300 tested at 50±2 HRC under the same testing conditions.

  • Thermal fatigue damage

    As a result of higher thermal conductivity, higher tempering and thermomechanical softening resistance, Thermal Fatigue crack propagation depth is lower than that of 18Ni300.

  • 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.

Range of tool and high-speed steel

Osprey® Standards Fe C Cr Ni Mo Si Mn W V Co N
A6 UNS T30106 Bal. 0.65-0.75 0.9-1.2 0.3 0.9-1.4 0.5 1.8-2.5 - - - - A6
D2 UNS T30402 Bal. 1.4-1.6 11.0-13.0 0.3 0.7-1.2 0.6 0.6 - 1.1 - - D2
H13 UNS T20813 Bal. 0.32-0.45 4.75-5.50 0.3 1.10-1.75 0.8-1.2 0.2-0.5 - 0.8-1.2 - - H13
HWTS 50 - - 0.18-0.25 2.5-3.0 - 2.0-2.5 0.05-0.50 0.10-0.50 - 0.4-0.6 - < 0.06 HWTS 50
M2 UNS T11302 Bal. 0.78-1.05 3.75-4.50 0.3 4.5-5.5 0.2-0.45 0.15-0.40 5.50-6.75 1.75-2.20 - - M2
MAR 55 - - 0.15-0.20 - - - - - - - - <0.05
S2 UNS T41902 Bal. 0.40-0.55 - 0.3 0.3-0.6 0.9-1.2 0.3-0.5 - 0.5 - - S2
T15 UNS T12015 Bal. 1.5-1.6 3.75-5.00 0.3 1.0 0.15-0.40 0.15-0.40 11.75-13.00 4.5-5.25 4.75-5.25 - T15
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