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Contact Details

Repco Technology Ltd.
"Number Three"
Siskin Drive
Middlemarch Business Park
West Midlands

Telephone: 02476 214442

Email: sales@repco-tech.co.uk

CrMo steel (1.4031)

Hardened, rust-resistant special spring steel strip 1.4031 (AISI 420)


As a result of the alloying with 13% Chrome and 1% Molybdenum, this alloy is corrosion-resistant against damp air, water vapour and water, but is not sufficiently resistant to chloride ions and acids. 


The advantages of this steel lie in its good wear-resistance and minimum internal tensions.


With a tensile strength of 1700–1950 N/mm², this material is ideal for springs, gauges, tools and knives.


In a particularly high-quality design, this material is also suitable for flapper valves.

If you prefer to talk to us directly call us on 02476 214442