Detail
Weldability
1.4542 can normally be welded using common welding processes. Preheating is recommended. Special filler metals have been developed for this alloy to facilitate welding. Typically a solution anneal follows welding to further improve mechanical properties. The complete welding procedure should be carried out before aging to avoid embrittlement of the heat-affected zone.
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Machinability
The alloy has relatively good machinability if processed prior to final hardening. After hardening, machinability is reduced by the material's high wear resistance and hardness. Continuous use of coolants and very robust tooling can help.
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Forgeability
1.4542 forges well, aided by its high heat resistance. The material is slowly heated before forging, typically in the 900-1200°C range. Cooling may be by water or air.
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Magnetizability
Due to its martensitic structure the material is magnetic; this should be considered when selecting the material for a component.
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Corrosion resistance
1.4542 performs well against many corrosive environments. Compared with other martensitic stainless steels it is among the best. In particular, its microstructure offers high resistance to intergranular corrosion because it contains very few to no chromium carbides.
