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Dimensions and characteristics
dWire diameter
4 mm
DiInner diameter
22 mm
LLength
65 mm
HDrill hole
5 mm
Material
Steel wire for mechanical springs
EN10270-1-SM
Spring steel wire made from non-alloy carbon steel, engineered for applications that demand solid strength, good ductility, and dependable fatigue performance. EN 10270-1-SM is commonly used for tension, compression, and torsion springs where improved cold-coiling characteristics and easier forming are beneficial compared to the higher-strength SH grade. Its closest AISI equivalents typically fall within the 1050–1070 range, depending on the specific carbon content.