Osprey® MAR-50 Co-free maraging steel

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), producing a powder with a spherical morphology which provides good flow characteristics and 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.

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

Laser - Powder Bed Fusion (L-PBF) -53 +/–15µm

The Electron Beam Back-scatter Diffraction (EBSD) analysis results confirm that the volume fraction of retained austenite (blue areas) is negligible in the as-built condition and the microstructure is essentially martensitic (red areas). This provides a suitable condition for direct ageing of the essentially martensitic as-built microstructure without the need for prior solution annealing.

Ageing curves

Typical mechanical properties of Osprey® MAR-50 Co-free maraging steel powder built by Laser - Powder Bed Fusion (L-PBF) in as-built and directly aged conditions, evaluated at room temperature.

*CVN = Charpy V-Notched impact toughness test

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.

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.

Maraging steels are a class of high strength and hardness martensitic steels which can be welded without preheating, either in annealed or heat-treated condition. Maraging steels are therefore employed as tool steels in the mold- and die-making industry, and for high-performance parts, e.g. in the aerospace industry. Maraging steels are characterized by very low carbon content favoring dimensional stability, and the presence of substitutional alloying elements such as Mo, Ti, and Al which trigger age hardening in Fe-Ni martensite by the precipitation of nanosized intermetallic particles (e.g., Ni3Ti, Ni3Mo, NiAl, and Fe7Mo6).

The martensitic microstructure of maraging steels is achieved through high nickel content as compared to most tool steels, which instead achieve their martensitic microstructure through a relatively high amount of carbon in the alloy composition. Given the Co price fluctuations, uncertainties associated with the supply sources and the health issues related to Co usage, Co-free alternatives to 18Ni300 are of great interest. Sandvik has successfully developed a new maraging steel free of Co, using the very latest metallurgical modelling systems, with reduced amount of Ni and an addition of Cr, to obtain a nearly fully martensitic microstructure already in as-built condition. Thus, the material can be directly aged to achieve levels of material performances including strength, hardness and toughness comparable to the conventional 18Ni300 maraging steel.