The document applies to calibrated and tested round steel link chains, grade 2, pitch t = 3,5d, and specifies their dimensions and mechanical properties.
DIN 764-1:1992 history
2015DIN 5696-1:2015 Round steel link chains - Round steel link chains, pitch 3,5d, for chain strands in bucket elevators - Part 1: Grade 2, case hardened
1992DIN 764-1:1992 Calibrated and tested round steel link chains for continuous conveyors; grade 2, pitch 3,5d