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Nickel-chromium solid-solution strengthened alloy, RA333® is reliable in corrosive and high temperature environments.

Not only is RA333® resistant to carburisation and thermal shock, this ultra-tough alloy also holds its strength over long period of time at temperature up to 1204°C.


Product form Size range from Size range to
RA333® sheet & plate 4.76 mm 25.4 mm
RA333® welding wire 0.89 mm 3.175 mm

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    Welding Consumables

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    Sheet & Plate

Chemical Analysis

% Ni Cr Mo Co W Si Mn C Fe
Min 44 24 2.50 2.50 2.50 0.75 - - -
Max 47 27 4 4 4 1.50 2 0.08 Balance


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Perfect for applications in the Thermal Processing industry

RA333® can be used in a variety of applications including:

  • Tube supports in refineries and coal fired boilers
  • Heat treating muffles, retorts, fan shafts and fixtures
  • Carbon fibre production muffles
  • Sulphuric acid plant stack dampers
  • Molten glass spinnerets
  • Flare tips
  • RA333 weld filler for repair welding of cast heat resistant alloys
  • Tire drop chutes for cement kilns

About RA333®

Due to the alloy’s high chromium, high nickel content and additional alloying elements, RA333® is highly resistant to carburisation, thermal shock and metal dusting.

The ultra-tough alloy holds its strength over a long period of time up to a staggering 1204°C. Moreover, RA333® is resistant to chloride ion and polythionic acid stress corrosion cracking.

RA333®  is an alloy of choice when traditional alloys such as RA330®, Alloy 600 and Alloy 601 are not suitable.


To learn more about RA333® contact us today!

RA333® is the registered trademark of Rolled Alloys Inc.


8.14 g/cm³
Melting Range:
1300 - 1245°C
94 HRB
Specific Heat Capacity:
300 J/kg.°C


UNS Number:
Werkstoff Number:
ASTM B718, B719, B722, B723, AMS 5593, 5717
Download the RA333® Data Sheet Download

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