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1.4550

X6CrNiNb18-10

The 1.4550 (X6CrNiNb18-10 (AISI 347)) is an austenitic, stainless [[element:Cr|chromium]]-[[element:Ni|nickel]] steel — non-magnetic, tough all the way through, and usually easy to weld. The [[element:Mo|molybdenum]] grades (like 1.4404 or 1.4571) also stand up better to chlorides. Known weak points when welding: high thermal expansion ([[glossary:verzug|distortion]]), tendency to [[glossary:heissriss|hot cracking]], and the risk of [[glossary:chromverarmung|chromium depletion]] in the [[glossary:waermeeinflusszone|heat-affected zone]]. Typical analysis: 0.05 % C, 17.5 % Cr, 1.2 % Mn, 0.5–1 % Nb, 9.5 % Ni, 0.5 % Si.

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