Application Segments

Oil & Gas/CPI

Melting Route


Product Description

BÖHLER A903 (UNS S32205) is the most common stainless ferritic-austenitic Cr-Ni-Mo steel with nitrogen addition.
In addition to good strength properties, this steel offers high corrosion resistance, especially against stress corrosion cracking in chloride-containing solutions, and is resistant to intergranular corrosion up to 300°C.
The alloy should not be used at temperatures above 300°C due to embrittlement.
Heat treatment after welding is not necessary.
Required surface finish: pickled, scale-free heat treated or machined.
Commonly used in the oil and gas industry, hydroelectric power, pressure vessels, pulp and paper industry, components and chemical tanks, such as parts for separators and heat exchangers and parts in the paper industry, oil and gas extraction , compressors, seawater desalination.

Property Features

Stainless ferritic-austenitic Cr-Ni-Mo-steel with nitrogen addition. High corrosion resistance, especially against stress corrosion cracking in solutions containing chloride. Good strength properties. Resistant to intergranular corrosion in the temperature range up to 300°C. Heat treatment subsequent to welding not necessary. Surface condition for optimum corrosion resistance: pickled, heat treated free from scale or machined.

Technical Specifications

Material Numbers

F51 1.4462 X2CrNiMoN22-5-3 S31803 S32205


10088-3 A182/A182M A276/A276M A479/A479M MDS D47

Chemical Composition

Chemical composition (average %)
max. 0.030 max. 1.00 max. 2.00 max. 0.030 max. 0.020 22.0 to 23.0 3.0 to 3.5 4.5 to 6.5 0.14 to 0.20

Available product shapes

Information on Long Products ) Presented data refer exclusively to long products. Please observe the detailed explanations at the end of the data sheet (pdf).

  • Long Products
  • Open Die Forgings
  • Semi-Finished Products / Billet

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