Alloy 31

Alloy 31

Alloy 31 is an iron-nickel-chromium-molybdenum alloy with the addition of nitrogen. The alloy closes the gap between high-alloy austenitic special stainless steel and nickel alloys. 

Characteristics of Alloy 31

Alloy 31 is characterized by: 

  • excellent corrosion resistance in alkaline and acidic halide containing media; 
  • excellent resistance to sulphuric acid, even in highly concentrated form; 
  • excellent resistance to corrosion and erosion in phosphoric acid media; 
  • excellent resistance to reducing and oxidising media and to boiling azeotropic nitric acid. 
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Alloy 33

Alloy 33 is an austenitic alloy which, thanks to its well-balanced analysis and exceptionally high chromium concentration, has excellent resistance to common corrosion and pitting corrosion in media containing chloride. 

Characteristics of Alloy 33

Alloy 33 is characterised by excellent resistance to pitting corrosion in chlorinated media and to general corrosion in hot mineral acids, mixed acids and alkalis, as well as seawater and brackish water. 

Alloy 59

Alloy 59 is a developed nickel-chromium-molybdenum alloy, which has particularly low concentrations of carbon and silica and is characterised by excellent corrosion resistance and high strength. 

Characteristics of Alloy 59

Alloy 59 is characterised by: 

  • excellent resistance to a large number of corrosive media under oxidizing and reducing conditions; 
  • excellent resistance to chloride-induced pitting and crevice corrosion, as well as resistance to stress corrosion; 
  • excellent resistance to mineral acids such as nitric acid, phosphoric acid, sulphuric acid and hydrochloric acid, but especially to sulphur/chloric acid mixtures. 

Alloy in your project:

Would you like to use alloy in your project? Peco Douwes is your partner par excellence. All our fasteners are available in all sizes and in any desired material. Our specialists will be happy to discuss your wishes and the delivery options. If you would like to order one or more of our products in alloy, please contact us. 

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Custom-made

Is customization required for your project? No problem, custom-made fasteners are possible. Please contact our product specialists to discuss the options.