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Rev. Met. Paris, N°5 (May 2009), pp. 214-219
DOI: 10.1051/metal/2009036
Lean Duplex UR2202: an alternative to 304L with increased corrosion resistance and mechanical properties
J. Peultier, S. Jacques and V. BauduPublished online: 13 May 2009
Abstract
The paper presents the new Mo free duplex stainless steel
UR2202 (EN 1.4062) developed to provide a cost effective
alternative to 304L (EN 1.4307), concrete, organic materials
or galvanized carbon steel in potable water systems, pulp &
paper industry and construction applications. The reduction
of Ni is balanced by a nitrogen addition in order to obtain
a microstructure containing approximately 50% ferrite and
50% austenite. Several industrial heats were produced with
22Cr%, 2Ni% and 0.2N% as the typical composition. The
new lean duplex grade UR2202 has better localized and
uniform corrosion resistance and twice the yield strength
than 304L.
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