Soft Steels are manufactured with 2mm wire rope encased in a black polyester sleeve complete with an inspection window. Generally used for both lifting and suspension.
They are NOT manufactured to the EN Standard for Round Slings (7:1 Safety Factor) but to standard for wire rope and therefore rated on an 5:1 Safety Factor. Their inspection includes ensuring that the two ends are secured together. The soft steel does not have to be destroyed if the casing is damaged as with Polyester Round Slings, as the casing is not an integral part of the application.
It is up to the discretion of the user when the soft steel is no longer fit for purpose.