Behavior of the nitrogen bearing martensitic stainless steel: XD15NW in cryotechnical environment

Abstract Bearings in the turbopump for the space launchers main engine operate in extremely harsh conditions. The X105CrMo17 (or AISI 440C) martensitic stainless steel is currently used for manufacturing the rings and balls for these bearings. Nevertheless, certain properties of this steel fall short of those required in future turbopumps. At the present time, there…

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Fracture Toughness Data

Reproduced with permission, from “A Comparison of the Mechanical and Physical Properties of Contemporary and New Alloys for Aerospace Bearing Applications”, copyright ASTM International, West Conshohocken, PA, 2002, DOI: 10.1520/STP10866S, www.astm.org. Download ASTM Paper: A Comparison of the Mechanical and Physical Properties of Contemporary and New Alloys for Aerospace Bearing Applications  

Fatigue Data

Rotating Beam Fatigue Test Results Test Conditions: – Completely reversed bending conditions (R = -1) – Test Specimens: cylindrical rods 16mm maximum diameter x 110mm long.  Minimum diameter in the central hourglass-shaped section was 10mm and the radius of curvature was 50mm.   – A minimum of forty (40) test specimens was used for each material. Reproduced…

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XD15NW Comparison vs. other Aerospace Alloys

A Comparison of the Mechanical and Physical Properties of Contemporary and New Alloys for Aerospace Bearing Applications Abstract: This paper presents the results of several contributing sources in establishing the mechanical and physical properties of various new candidate alloys for aerospace bearing applications. The alloys evaluated included the high Nitrogen steels Cronidur 30 and XD15NW,…

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