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  • Sheffield Gauge Plate is the UK's favourite 420 tool steel stockholder and supplier, delivering to the UK and globally.

    420:1.2083 Mould Steel properties

    420 Tool Steel description

    420 tool steel (1.2083) is a chrome-alloy, wear and corrosion-resistant plastic mould steel. Tool steel 420 can be characterised by its high chromium content, and how resistant it is to corrosion and acid, especially when hardened, tempered and polished. Due to these fantastic properties, the 420 (1.2083) plastic mould steel is an excellent choice for industries that require significantly better hygiene, such as medical and optical.


    If you require to forge 420 tool steel, then you should heat slowly and uniformly until a temperature of 1000°C. After, take your steel and cool slowly in a furnace.


    Hardening 420 involves preheating the steel to 600-700°C until it is heated. After, continue to heat until a temperature of 980-1050°C. It is essential to protect your 420 steel from decarburisation, which is achieved by using a salt bath, atmosphere furnace or vacuum. Finally, air cool or quench in oil.


    420 form of supply

    Sheffield Gauge Plate is 420 tool steel stockholder and supplier in a plate, flat bar, round bar and diameter form. Ground flat stock can also be supplied in non-standard and standard sizes, no matter the order quantity.



    420 is perfect for plastic moulds and different inserts because of the special polishing it offers. Furthermore, optical and medial environments tend to use 420 because of its corrosion resistance obtained in hardened and low tempered condition.


    If you have a tooling project which you think 420 would be suitable for contact us today to discuss your options.


    420 ground flat stock / Gauge Plate

    As 420 steel suppliers, we’ve got stock available to provide ground flat stock in 420 steel-grades. Our flat ground stock and gauge plate is supplied in both metric and imperial measurements, and we offer a range of lengths and thicknesses. Not to mention, if you require a supplier that can provide non-standard sizes, you’re in the right place. Contact us today to learn more about our hire work facilities or to place an order for 420 tool steel.

    Get a quote for 420 today!


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