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Stainless Steels

  • Q Is 440C stainless steel corrosion resistant?

    A
    It has moderate corrosion resistance, but less  t han 304 or 316, so it is not suitable for marine  environments.

  • Q Why is 440C used for knives and bearings?

    A
    Because it provides high hardness, wear  resistance, and good edge retention.

  • Q Can 420 stainless steel be mirror-polished?

    A
    Yes, it has excellent polishability and is often  used for high-shine surfaces like cutlery and  medical tools.

  • Q How does 420 compare to 440C?

    A
    420 is tougher but less hard and wear-resistant  t han 440C, making it better for applications  needing durability over extreme hardness.

  • Q Why is 420 called surgical stainless steel?

    A
    Because it is widely used for surgical tools due  to its polishability, hardness, and acceptable  c orrosion resistance.

  • Q Where is A286 commonly used?

    A
    In aerospace engines, gas turbines, and high  t emperature fastening systems.

  • Q Is A286 corrosion resistant?

    A
    Yes, it has corrosion resistance comparable to  316, plus excellent oxidation resistance at high  heat.

  • Q Why is A286 considered a high-temperature alloy?

    A
    Because it retains high strength and stability up  to 700 °C.

  • Q What industries use Nitronic 60 most?

    A
    Oil & gas, marine, and machinery industries that  require anti-galling fasteners and valves.

  • Q Does Nitronic 60 have good corrosion resistance?

    A
    Yes, it is similar to 304/316, but its main  advantage is wear resistance.

  • Q Why is Nitronic 60 special compared to 304/316?

    A
    Because it resists galling and wear far better,  even under heavy sliding contact.
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