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blue tempered

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Article22 Jul 2026Flat High-Carbon Spring Steel StripCold-rolled spring strip to ASTM A682 — the two steels that cover 95 % of flat springs, rolled tempers No. 5 to No. 1, mill-hardened T1–T3 strip with strength by thickness, edge numbers 1–6, and finish and heat-treatment practice.7 min readRead More