FIELD: metallurgy.
SUBSTANCE: along the weakened line the cap for tin can is produced out of unalloyed or low alloyed steel plate with carbon content below 0.1 wt %, wherein the steel plate is subjected to recrystallisation annealing with heating rate exceeding 75 K/s, and after recrystallisation annealing is cooled with rate at least 100 K/s, and then the protective layer is applied.
EFFECT: reduced detachment force of the tin can cap with permanent wall thickness.
11 cl, 5 dwg
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