scholarly journals Effect of heat treatment processes on the localized corrosion resistance of austenitic stainless steel type 301 in chloride/sulphate solution

2018 ◽  
Vol 11 ◽  
pp. 570-576 ◽  
Author(s):  
Roland Tolulope Loto ◽  
Cleophas Akintoye Loto ◽  
Idehai Ohijeagbon
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Sulphate Solution ◽  
Localized Corrosion ◽  
Steel Type ◽  
Treatment Processes

VLX 954

Alloy Digest ◽  
1995 ◽  
Vol 44 (4) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Sea Water ◽  
Heat Treating ◽  
Localized Corrosion ◽  
Temperature Performance

Abstract VLX 954 is an austenitic stainless steel with 6% (nominal) molybdenum. The alloy is particularly resistant to localized corrosion in sea water and chloride environments. 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, machining, and joining. Filing Code: SS-589. Producer or source: DMV Stainless USA Inc.

Failure Analysis of a Cracked Stainless-Steel Steam-Water Separator

2021 ◽  
Author(s):  
Jin Shi ◽  
Wen Liu ◽  
Xin Cheng
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Failure Analysis ◽  
Post Weld Heat Treatment ◽  
Composition Analysis ◽  
Austenite Stainless Steel ◽  
Water Separator ◽  
Weld Heat

Abstract Currently, austenitic stainless steel has been widely used for the pressure boundary, including reactors, separators and storage tanks serviced in energy, petrochemical, chemical and food industries in view of its inherent corrosion resistance. However, the corrosion resistance may deteriorate under some circumstances such as field welding and inappropriate post-weld heat treatment. A steam-water separator serviced in a power plant was found cracking and a large amount of steam leaked outside. The cracking was located in the heat-affected zone (HAZ) of the joint on the head side of the pressure vessel. The material of the head was SUS 304 austenite stainless steel. Failure analysis was conducted to investigate the cause of cracking. The testing and measurement included chemical composition analysis, metallographic examination, fracture surface observation and deposit elements analysis. Results showed that the cracking was intergranular and stress corrosion cracking (SCC) was the primary cause of failure. During the fabrication of the separator, the HAZ of the joint was overheated by the thermal input of welding. Brittle carbides such as M23C6 precipitating at the grain boundary, resulted in a narrow belt lack of chromium nearby known as sensitization. The corrosion resistance of the austenite stainless-steel decreased obviously there, and cracking failure occurred rapidly under tensile stress. The influencing factors discussed in this paper mainly focused on material performance, post-weld heat treatment, and corrosivity of medium. Austenitic stainless steel containing stabilizing elements or with low C content was recommended for the new vessel design in order to avoid similar cracking failure.

scholarly journals Effect of Nitrogen on the Corrosion Behavior of Austenitic Stainless Steel in Chloride Solutions

2015 ◽  
Vol 9 (11) ◽  
pp. 119 ◽  
Author(s):  
W. A. Ghanem ◽  
W. A. Hussein ◽  
S. N. Saeed ◽  
S. M. Bader ◽  
R. M. Abou Shahba
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Localized Corrosion ◽  
Partial Replacement ◽  
General Corrosion ◽  
Heat Treated ◽  
The Difference

The effect of partial replacement of nickel with nitrogen on the corrosion resistance of newly designed austenitic stainless steel samples without and with heat treated was investigated in 3.5wt% and 5wt% NaCl solution using open-circuit, potentiodynamic, cyclic anodic polarization and electrochemical impedance spectroscopy techniques. The results showed that, passivation in sample 1 where the highest addition of nickel and low addition of nitrogen is different from that for sample 4 where the nitrogen is greatest and the nickel is reduced almost to the third comparing sample 1. The difference in responses of heat treated samples to localized and general corrosion could be attributed to the difference in their phase compositions. The appearance of ferrite phase for samples (2, 4, 5 and 6) after heat treatment resulted in lowering the general and localized corrosion resistance than as forged samples in contrast with samples 1 and 3, where they still pure austenite. The obtained results are confirmed by surface examination.

Evaluation of Corrosion Fatigue Characteristics of Artificially Sensitized Austenitic Stainless Steel Using the DCPD Method

2006 ◽  
Vol 321-323 ◽  
pp. 607-610
Author(s):  
Dong Ho Bae ◽  
Byung Bok Choi ◽  
Gyu Young Lee
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Corrosion Fatigue ◽  
Welding Process ◽  
Large Problem ◽  
Degree Of Sensitization ◽  
Fatigue Characteristics

Austenitic stainless steel has a large problem to decrease its corrosion resistance and mechanical properties by sensitization in the welding process. Thus, in this paper, corrosion fatigue characteristics of artificially sensitized STS304 were investigated. According as heat treatment period for sensitization increases, the Cr-carbide deposition in the grain boundary and degree of sensitization (Ia/Ir) increased. From the results, corrosion fatigue strength of sensitized STS304 was remarkably reduced compare to non-sensitized ones.

CARPENTER 19-9 DL

Alloy Digest ◽  
1987 ◽  
Vol 36 (5) ◽  
Keyword(s):  
Heat Treatment ◽  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Heat Treating ◽  
Temperature Performance ◽  
Cold Worked ◽  
Oxidation And Corrosion

Abstract CARPENTER 19-9 DL has been designed primarily for oxidation and corrosion resistance in service up to 1250 F. It is an austenitic stainless steel and, as with all such materials, is not hardenable by heat treatment. When higher is required, the alloy is] hot-cold worked. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-485. Producer or source: Carpenter.

AK STEEL TYPE 201

Alloy Digest ◽  
2020 ◽  
Vol 69 (1) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Lower Cost ◽  
Steel Type ◽  
Temperature Performance ◽  
Steel Corporation

Abstract AK Steel Type 201 is a chromium-manganese-nickel austenitic stainless steel that was developed to conserve nickel. Its properties are similar to those of Type 301. It is a lower cost alternative to Type 301 in certain environments. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-1313. Producer or source: AK Steel Corporation.

scholarly journals Microstructure, Mechanical, and Corrosion Properties of Ni-Free Austenitic Stainless Steel Prepared by Mechanical Alloying and HIPping

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3416
Author(s):  
Eliza Romanczuk ◽  
Krzysztof Perkowski ◽  
Zbigniew Oksiuta
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Hot Isostatic Pressing ◽  
Total Elongation ◽  
Nitrogen Atmosphere ◽  
Corrosion Properties ◽  
Isostatic Pressing

An influence of the powder metallurgy route on the phase structure, mechanical properties, and corrosion resistance of Fe–18%Cr–12%Mn–N nickel-free austenitic stainless steel as a potential material for medical applications were studied. The powder was mechanically alloyed in a high purity nitrogen atmosphere for 90 h followed by Hot Isostatic Pressing at 1150 °C (1423 K) and heat treatment at 1175 °C (1423 K) for 1 h in a vacuum with furnace cooling and water quenching. More than 96% of theoretical density was obtained for the samples after Hot Isostatic Pressing that had a direct influence on the tensile strength of the tested samples (Ultimate Tensile Strength is 935 MPa) with the total elongation of 0.5%. Heat treatment did not affect the tensile strength of the tested material, however, an elongation was improved by up to 3.5%. Corrosion properties of the tested austenitic stainless steel in various stages of the manufacturing process were evaluated applying the anodic polarization measurements and compared with the austenitic 316LV stainless steel. In general, the heat treatment applied after Hot Isostatic Pressing improved the corrosion resistance. The Hot Isostatic Pressing sample shows dissolution, while heat treatment causes a passivity range, the noblest corrosion potential, and lower current density of this sample.

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