Influence of Austenitizing Temperature on the Microstructure and Corrosion Resistance of 55Cr18Mo1VN High-Nitrogen Plastic Mould Steel

Abstract Nirosta 4429 is a low-carbon, high-nitrogen version of type 316 stainless steel. The low carbon imparts intergranular corrosion resistance while the nitrogen imparts both higher strength and some increased pitting corrosion resistance. It is recommended for use as welded parts that need not or cannot be annealed after welding. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-787. Producer or source: ThyssenKrupp Nirosta.

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AL 4565 ALLOY

Alloy Digest ◽

10.31399/asm.ad.ss0906 ◽

2004 ◽

Vol 53 (8) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

High Temperature ◽

High Resistance ◽

Flue Gas ◽

Heat Treating ◽

Flue Gas Desulfurization ◽

High Nitrogen ◽

Temperature Performance ◽

High Level

Abstract AL 4565 alloy has a high level of austenitizers, which provides the microstructure with a high resistance to sigma formation during welding. The high nitrogen also gives the alloy superior strength among the austenitics. Applications include flue gas desulfurization and handling seawater. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-906. Producer or source: Allegheny Ludlum Corporation.

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La corrosion par piqûres d'aciers inoxydables austéno-ferritiques dans l'eau de mer synthétique

Matériaux & Techniques ◽

10.1051/mattech/199684060023s ◽

1996 ◽

Vol 84 ◽

pp. 23-30

Author(s):

I. Trigui ◽

H. Sidhom ◽

C. Braham ◽

J. Lédion

Keyword(s):

Corrosion Resistance ◽

Pitting Corrosion ◽

Sea Water ◽

Phase Behaviour ◽

High Nitrogen ◽

Electrochemical Tests ◽

Analysis Techniques ◽

Pitting Corrosion Resistance ◽

Nitrogen Contents ◽

Image Analysis Techniques

Duplex stainless steels crevice and pitting corrosion resistance in synthetic sea water is studied. Conventional electrochemical tests and image analysis techniques are used. Three commercial steels are examined. The forged material has the best behaviour, whereas cast materials, in spite of their high nitrogen contents, have a lower corrosion resistance. Micrographic studies show a good correlation between pittings distribution and inclusions distribution and reveal that gamma phase behaviour is more affected by inclusions. The metallurgic purity of products seems to be the most important parameter in this type of corrosion. Consequently, the PREN index is questionable in pitting corrosion grading of these steels because it does not take into acount the inclusions effect.

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