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1. Typology
The main types of refractory steels and alloys can be classified according to their metallographic structure as follows.
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Martensitic or semi-ferritic steels
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5-10% Cr steels
They generally have Si, Al, Mo and V additions. Strictly speaking, they are not stainless steels, but their use puts them in the category of refractory steels. In this category, we find 6% Cr steels, used for superheater tubes in thermal power plants (X8CrMoV6 steel), or to withstand hydrogen under pressure at high temperatures.
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9-10% Cr steels
They are used for superheater tubes (X10CrMo9, X10CrMoVNb9).
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10-13% Cr steels
They are...
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Typology
Bibliography
Also in our database
Standards and norms
- Aciers moulés réfractaires. - NF EN 10295 – AFNOR - Décembre 2002
- Aciers et alliages de nickel réfractaires. - NF EN 10095 – AFNOR - Juillet 1999
- Rivet wire in aluminum alloys, steel, stainless and refractory alloys – Dimensions. - NFL 21-106 – AFNOR - Janvier 1975
- Rivets in steel, stainless and refractory alloys – Technical specifications. - NFL 21-203 – AFNOR - Novembre 1974
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