Stainless steels. Chemical composition

2011 ◽  
Keyword(s):  
Chemical Composition ◽  
Stainless Steels

Chemical composition and electronic structure of the passive layer formed on stainless steels in a glucose-oxidase solution

2008 ◽  
Vol 54 (1) ◽  
pp. 123-132 ◽  
Author(s):  
C. Marconnet ◽  
Y. Wouters ◽  
F. Miserque ◽  
C. Dagbert ◽  
J.-P. Petit ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Chemical Composition ◽  
Glucose Oxidase ◽  
Stainless Steels ◽  
Passive Layer

Susceptibility to Underclad Cracking in Relation to Chemical Composition

1976 ◽  
Vol 98 (4) ◽  
pp. 342-347 ◽  
Author(s):  
R. Kume ◽  
H. Okabayashi ◽  
M. Amano
Keyword(s):  
Chemical Composition ◽  
Base Metal ◽  
Stainless Steels ◽  
Weld Overlay ◽  
Ferritic Stainless Steels ◽  
Stress Relieving ◽  
Covered Electrodes ◽  
Overlap Area ◽  
Cracking Tendency ◽  
Cladding Material

Heat-affected zone cracking under the weld-overlay-cladding has been investigated for the combination of 22 kinds of ferritic base metals and electrodes including strip electrodes of austenitic and ferritic stainless steels, Inconel and mild steel, and covered electrodes of austenitic and ferritic stainless steels and Inconel. The results indicate that (1) intercrystalline cracks form on stress relieving under the overlap area of the cladding beads, (2) the susceptibility to cracking depends markedly on the chemical composition of the base metal, and the following equation predicts cracking tendency, ΔG = [Cr] + 3.3 [Mo] + 8.1 [V] − 2, and (3) cracking is avoided or decreased by using cladding material which is similar in thermal expansion coefficient to base metal.

scholarly journals Stainless steel corrosion in instrumentation pipe

2019 ◽  
Vol 14 (40) ◽  
pp. 31-40
Author(s):  
Jean Victal do Nascimento ◽  
Rafael Adão de Carvalho ◽  
Davi Pereira Garcia ◽  
Rômulo Maziero ◽  
Edelize Angelica Gomes ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Chemical Composition ◽  
Austenitic Stainless Steel ◽  
Stainless Steels ◽  
Chloride Ions ◽  
Main Function ◽  
Marine Atmosphere ◽  
Steel Aisi ◽  
Aisi 316 ◽  
Stainless Steel Aisi

Corrosion, being a destructive process, causes damage in almost all industrial sectors. In this way, it is harmful both from an economic, social and, especially, safety point of view, as it can cause failures in critical equipment and components of an industrial process. At this point, stainless steels are considered the most corrosion resistant metals. The resistance depends on the chemical composition and microstructure, factors that directly influence the passivation of these materials. The resistance is proportionally related to the addition of chromium (Cr) to the mixture, as well as other alloying elements, among which is the molybdenum (Mo), whose main function is to maximize corrosion resistance in the marine atmosphere, as in case of austenitic stainless steel AISI 316 which presents in the chemical composition a percentage of the element Mo. Austenitic stainless steels are applied in instrumentation systems in tubing for reliability in severe atmospheres in accordance with ASTM A269 which establishes the materials applicable to this function. Thus, the present work presents, through a review and case study, Pitting Corrosion of tubings of austenitic stainless steel AISI 316 in the presence of chloride ions (Cl-) coming from the marine atmosphere. The results show that there is no change in the longitudinal and transverse structure for all analyzed tubes, showing a homogeneous austenitic structure, free of intergranular precipitations.

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