Alloy Steel 5160, also sold as AISI 5160, is a high carbon and chromium spring steel.

52CRMOV4, 51CRMOV4, 1.7701, AISI 4150 - SPRING STEEL ACCORDING TO EN 10089:2005

EN 1.5023 (38Si7) Silicon Steel EN 1.5023 steel is an alloy steel formulated for primary forming into wrought products. 1.5023 is the EN numeric designation for this material. 38Si7 is the EN chemical designation.

ALLOY TOOL STEEL FOR COLD WORKING 80CRV2, 1.2235 ACCORDING TO DIN 17350, UNE 36018, EN 10132-4.

Steel C100S，Low-alloy carbon steel for thermal improvement by oil hardening available in strips and thin cold-rolled sheets used for springs and leaf springs with small cross-sections。

C75S material is EN EN 10132-4 (2000) Cold rolled narrow steel strip for heat treatment

C67S steel is non-weldable, prone to decarburization and oxidation during heat treatment, and is not resistant to atmospheric corrosion.

C60 steel is an unalloyed medium carbon engineering steel which has 0.57%-0.65% Carbon as per EN10083 standard.

C55S is a medium carbon steel suitable for various type of applications where high strength is needed.

51CrV4 is a high strength quench and tempering steel suitable for quenched and tempered springs.

5160 are more responsive to heat and mechanical treatments than carbon steels.