This page has some images corresponding to the removal criteria for alloy steel chain slings. Study this chart carefully so that you may learn to identify the removal criteria and their visual manifestation.
Heat damage,
heat > 1000°F
Bent, twisted,
or cracked links
Broken welds
or components
Non-hinging components
Severe corrosion or pitting
Elongation of links
or components
Bent, twisted, or
cracked master links
or couplers
Links or attachments
with severe wear,
nicks, or gouges
Non-working latches
Hook spread or twist
Missing or illegible
sling identification
Makeshift links or fasteners