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See Chinese contents: GB/T 342-2017 GB/T 342-2017: Dimension, shape, mass and tolerance of cold-drawn round, square and hexagonal steel wires
This Standard specifies the dimension, shape, mass and tolerance of colddrawn round, square and hexagonal steel wires. This Standard is applicable to the cold-drawn round steel wire with a diameter of 0.05 mm~20 mm, the cold-drawn square steel wire with a side length of 0.50 mm~10 mm, and the cold-drawn hexagonal steel wire with an opposite side distance of 1.60 mm~10 mm.
