The document applies to calibrated and tested round steel link chains, grade 3, pitch t = 3,5d, and specifies their dimensions and mechanical properties.
DIN 764-2:1992 history
2010DIN 764-2:2010-10 Round steel link chains - Round steel link chains for chain conveyors - Part 2: Grade 5
2010DIN 764-2:2010 Round steel link chains - Round steel link chains for chain conveyors - Part 2: Grade 5
1992DIN 764-2:1992 Calibrated and tested round steel link chains for continuous conveyors; grade 3, pitch 3,5d