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From
Taian,
Shandong,
China
Spring steel strip
Steel grade
65Mn,1065,SAE1055,1045,CK50,CK55, CK60,CK67, CK70,CK75, C75Cr1,50CrV4, 51CrV4,
60Si2Mn, etc
Thickness 0.08-4.0mm
Width 3-400mm
Hardness