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Austenitic stainless steel

Osprey® 904L

Osprey® 904L is a high-alloy austenitic stainless steel characterized by very good resistance to general corrosion in sulphuric, phosphoric and acetic acid as well as to pitting and SCC.

UNS
N08904
ASTM, AISI
904L
EN Name
X1NiCrMoCu25-20-5
EN Number
1.4539
ISO
4539-089-04-I

Powder designed for

  • Additive Manufacturing (AM)
  • 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 Sep 8, 2023 9:15 AM CET (supersedes all previous editions)

Download datasheet PDF

  • Chemical composition (nominal), %
    Fe
    Bal.
    C
    0.02
    Cr
    19.0-23.0
    Ni
    23.0-28.0
    Mo
    4.0-5.0
    Si
    1.0
    Mn
    2.0
    S
    0.035
    P
    0.045

  • Powder characteristics and morphology

    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 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.

  • Mechanical properties

    Test samples were made by Laser Powder Bed Fusion (L-PBF) technology, based on a GE Concept Laser M2 machine operated by Flono Additive. The testing followed the general principles defined in ISO 17296-3 covering the main characteristics and corresponding test methods for porosity, hardness, tensile and Charpy impact testing. In addition to ASTM F3122-14 - Standard Guide for Evaluating Mechanical Properties of Metal Materials Made via Additive Manufacturing Processes.

    The Osprey® 904L powder used had a powder size distribution of 15 to 45 microns. The as-built samples were mechanically post processed (by turning, milling, cutting, grinding etc.) according to the standard-compliant test specimen requirements. A selection of as-built samples were heat treated (for stress relief) according to the instruction of the material type. Typically, 904L stainless steels can be solution annealing heat-treated at 1050 to 1150°C, following by rapid cooling in air or water.

    Sample orientation; 90° - perpendicular to build plate (vertical).

    Mechanical properties, metric units
    Condition Direction Yield strength Tensile strength Elongation Impact toughness Hardness
    Rp0.2 Rm A
    MPa MPa % J HRC
    L-PBF, as built Vertical 533 (12.5 SD) 707 (2.7 SD) 26.5 (0.7 SD) 141 (2.3 SD) 8.06 (0.11 SD)
    L-PBF, heat treated Vertical 406 (11.5 SD) 705 (8.1 SD) 29.2 (2.2 SD) 144 (3.5 SD) 8.66 (0.05 SD)
    Mechanical properties, imperial units
    Condition Direction Yield strength Tensile strength Elongation, % Impact toughness Hardness
    Rp0.2 Rm A
    ksi ksi % J/cm2 HRC
    L-PBF, as built Vertical 77.3 (1.8 SD) 103 (0.4 SD) 26.5 (0.7 SD) 176 8.06 (0.11 SD)
    L-PBF, as built Vertical 58.9 (1.7 SD) 102 (1.2 SD) 29.2 (2.2 SD) 180 8.66 (0.05 SD)

  • 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.

Range of austenitic stainless steel

Osprey® Standards* Fe C Cr Ni Mo Si Mn S P Other O
1.4882 UNS S63019 Bal. 0.5 21 4.5 - 0.3 9.0 ≤0.05 ≤0.03 - - 1.4882
304L UNS S30400 / S30403 Bal. 0.03 18.0-20.0 8.0-12.0 - 1.0 2.0 0.03 0.045 - - 304L
310S UNS S31008 Bal. 0.08 24.0-26.0 19.0-22.0 - 1.5 2.0 0.03 0.045 - - 310S
316L UNS S31600 / S31603 Bal. ≤0.03 16.0-18.0 10.0-14.0 2.0-3.0 ≤1.0 ≤2.0 ≤0.03 ≤0.045 N ≤0.10 - 316L
316Ti UNS S31635 Bal. 0.08 16.0-18.0 10.0-14.0 2.0-3.0 1.0 2.0 - - Ti 0.7,N 0.25 - 316Ti
904L UNS N08904 Bal. 0.02 19.0-23.0 23.0-28.0 4.0-5.0 1.0 2.0 0.035 0.045 - -
HK30 JIS J92403 Bal. 0.25-0.35 23.0-27.0 19.0-22.0 0.5 0.75-1.75 1.5 - - Nb 1.20-1.50 - HK30
N-50 UNS S20910 Bal. 0.03-0.05 20.5-22.0 11.7-13.0 2.0-2.5 0.2-0.6 4.0-5.5 ≤0.015 ≤0.040 Ta ≤0.10, Ti ≤0.02, Sn ≤0.03, W ≤0.15, Cu ≤0.75 - N-50
N-60 UNS S21800 Bal. 0.1 16.0-18.0 8.0-9.0 - 3.5-4.5 7.0-9.0 - - N 0.08-0.18 - N-60
PANACEA - Bal. ≤0.05 16.5-17.5 ≤0.10 3.0-3.5 0.40-0.80 10.5-11.5 ≤0.04 ≤0.04 Co ≤0.05, N 0.15-0.60, Nb ≤0.73 <0.2 PANACEA

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

For more information

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