For anchor chains made of 1.4404 (AISI 316L), no warranty applies for use in salt water. Ketten Wälder GmbH offers a 3 year warranty period against corrosion for its cromox Duplex 1.4462 (AISI 318LN) chains with the electropolished finish and 2 years of warranty for cromox Duplex chains with the bright polished finish. This warranty period comes into effect from the date of purchase.