[SMM Stainless Steel Market Flash] Japan's Nippon Kinzoku Starts Mass Output of Ultra-Thin Stainless for Insulin Needles

Published: Aug 28, 2026 14:01
Tokyo-based stainless steel maker Nippon Kinzoku has begun mass production of ultra-thin, narrow-width stainless steel optimised for laser welding in ultra-fine insulin needles, the company said in a statement carried by Bernama on August 27. It said a stable supply system is now in place after trials with leading needle makers. The needle industry is shifting from TIG or plasma welding to laser welding, which allows faster welding and base material more than 50% thinner at the initial stage — 0.08 mm versus 0.2 mm previously — supporting wider use of 30G to 32G needles in pen injectors. Its NK-304NKM grade, used in thin-walled welded tube for medical and cosmetic uses, holds about 57% share in Japan and 55% in key overseas regions, per company research in March 2026.

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