BSS Spring Steel stock supply 75Cr1 Carbon Spring Steel Sheet in a range of sizes, from 1mm to 9.35mm thick.
The hardness range is 42-44HRC, 48-50HRC and in annealed condition in the thicker gauges.

75Cr1 is a high carbon spring steel with a carbon content between 0.74% and 0.80%. The addition of chromium facilitates the heat treatment process and allows higher hardness to be achieved than the standard C75 Carbon Steel.

Chemical Composition
Carbon - 0.74 - 0.8%
Manganese - 0.65 - 0.8%
Silicon - 0.25 - 0.45%
Phosphorous - 0.025% max
Sulphur - 0.010% max
Chromium - 0.3 - 0.45%

75Cr1 carbon spring steel sheet is a variation on En10132 C75, and US specification 1075. It is a high carbon steel strip grade supplied in either hardened and tempered or annealed condition.
75Cr1 carbon spring steel sheet can be cut by laser or waterjet. It is generally used in manufacturing knives, springs, agricultural tools and shims. Whilst it can and is used for a variety of spring and tool applications, it has found particular popularity in the manufacture of saws.

BSS stock 75Cr1 carbon steel from 1mm through to 5mm in the hardened and tempered condition and up to 10mm in the annealed condition.

75Cr1 Carbon Steel Equivalent grades
CK75, CS70, C75, CS80, 1074, 1.2003, 1075+cR

Common applications
Springs, Knives and Blades, Hand Tools, Agricultural Tools, Shims, Biomass Stirrers

Heat treatment advice.
830 - 860C / 1530 - 1580F
Quenching Medium Oil

** We do not supply Mill Certificates with orders, we only supply Certificates of Conformity (CoC) **