Carbon & Mild Steel Grades

High-carbon spring steels and low-carbon mild steels for engineering and packaging.

Grade / Alloy	UNS/W.Nr.	Chemical Composition (% Max, unless range)	Typical Properties & Uses
CS70	– / 1.1231	C 0.65-0.75, Mn 0.50-0.80, Si 0.15-0.35, P 0.04, S 0.05, Fe Bal	High-carbon; strength, hardness, wear resistance. Uses: springs, shafts, mechanical components. Tempers: Annealed to hardened.
CS80	– / 1.1248	C 0.75-0.85, Mn 0.50-0.80, Si 0.15-0.35, P 0.04, S 0.05, Fe Bal	Higher carbon for hardness; strength, wear. Uses: blades, tools, high-strength parts. Tempers: Annealed to hardened.
DX51	– / 1.0226	C 0.12, Mn 0.60, Si 0.30, P 0.045, S 0.045, Fe Bal	Low-carbon for galvanizing; formability, corrosion after coating. Uses: construction, automotive, appliances.
DC01	– / 1.0330	C 0.12, Mn 0.60, Si 0.30, P 0.045, S 0.045, Fe Bal	Low-carbon cold-rolled; deep drawing, forming. Uses: automotive panels, household appliances.

For full chemical compositions, mechanical properties, and certifications, download our data sheets (linked per grade). Tempers available for stainless: Annealed, 1/4 Hard, 1/2 Hard, 3/4 Hard, Full Hard, Super Hard. Custom tempers for others on request.