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Evaluation of UNS N08935 as CRA Material for Explosion Clad Plate

The austenitic alloy UNS N08935 has been developed to offer high resistance to corrosion in various environments – especially those containing high levels of chlorides or acid components. It can be an interesting alternative to conventional Ni-based alloys, due to its relatively low Ni-content at 35% by weight. In applications where thick gauges are required, it may be beneficial to utilize clad material – i.e., a thin layer of corrosion resistant alloy (CRA) bonded to a thicker gauge of a less costly backing material (typically carbon steel). In this work, explosion clad plate with a UNS N08935 CRA layer has been produced and evaluated to characterize the effect of the bonding process and heat treatment on the material properties. Prior to explosion bonding, two UNS N08935 plates were welded together (GTAW, groove weld, ENICRMO-13 filler metal) to simulate pre-cladding processing. The resulting welded plate was explosion bonded to SA516-70N carbon steel, and the effectiveness of the bonding process was confirmed via automated ultrasonic inspection of 100% of the clad surface. Mechanical testing at various locations was performed in order to characterize the strength of the UNS N08935 / carbon steel bond. Material properties of the CRA layer, in both the welded and unwelded condition and before and after heat treatments simulating subsequent processing steps for the bonded plate, have been evaluated in terms of microstructure and corrosion resistance.
Product Number: 51324-21018-SG
Author: Björn Helmersson; Curtis Prothe; Jan Y. Jonsson; Matt Shufran; Tim Delahanty
Publication Date: 2024
$40.00
$40.00
$40.00