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Weldments stainless steels

Specify appropriate welding techniques for stainless steels that may form more than one phase in the weldment (note Case History 15.1). [Pg.364]

Pakhomova, N. A. and Levin, I. A., Effect of Grain Size on the Inter-crystalline Corrosion of Stainless Steel Type 18-8 , Zashch. Metal, 9, 676 (1973) C.A., 80, 86207j Brown, M. H. and Kirchner, R. W., Corrosion of High Alloy Weldments 1. Sensitisation of Wrought High Nickel Alloys , Corrosion, 29, 470 (1973)... [Pg.201]

Unmixed zones. All methods of welding stainless steel with a filler metal produce a weld fusion boundary consisting of base metal that has been melted, but not mechanically mixed with filler metal and a partially melted zone in the base metal. An unmixed zone has the composition of base metal, but the microstructure of an autogenous weld. The microsegregation and precipitation phenomena characteristic of autogenous weldments decrease the corrosion resistance of an unmixed zone relative to the parent metal. Unmixed zones bordering welds made from overalloyed filler metals can be preferentially attacked when exposed on the weldment surface.14,61... [Pg.380]

Figure 6.27 Schematic diagram of different microstructures (sensitization) in an austenitic stainless steel weldment (Fritz)5... Figure 6.27 Schematic diagram of different microstructures (sensitization) in an austenitic stainless steel weldment (Fritz)5...
Localized biological corrosion of stainless steels. There are three general sets of conditions under which localized biological corrosion of austenitic stainless steel occurs (Figure 6.29). These conditions should be examined for metals that show active-passive corrosion behavior. Microbiological corrosion in austenitic steel weldments has been documented. (Wahid)61, (Krysiak)14... [Pg.382]

In rare cases, a relatively small area near the weld will be an anode to the relatively large cathodic surface area of the parent metal. In moderately corrosive media, this zone may corrode much faster than either the weld metal or the parent metal. Postweld heat treatment is usually helpful. In some instances, normalizing (or even solution annealing in the case of an austenitic stainless steel) the weldment is necessary, a measure that can cause significant distortion problems. In most cases, the weld metal, HAZ, and parent metal do not have significant galvanic differences. [Pg.1563]

M. Posada, J. DeLoach, A.P. Reynolds, M. Skinner, and J.P. Halpin, Friction Stir Weld Evaluation of DH-36 and Stainless Steel Weldments, Friction Stir Welding and Processing, TMS, 2001, p 159-171... [Pg.120]

The acid pulping process uses sodium bisulfite or magnesium bisulfite in a pulp digester at a pH of 3. Type 316 stainless steel is normally used as a minimum alloy because the sulfur dioxide can be converted into sulfuric acid. Sulfuric acid can corrode the stainless steel depending on the pH, temperatiire, and pressure of the system. SCC has been observed in the HAZ of weldments in the pulp digesters in the presence of sodium hydroxide. Because of SCC susceptibility of the austenitic stainless steels, duplex stainless steel 2205 is often used in pressure vessels and tanks. [Pg.180]

V.S. Raja, Localized corrosion behavior of austerutic stainless steel weldments and the role of nitrogen, in Proceedings of the International Conference on Corrosion, Corcoran, Mumbai, 1997, pp. 409—420. [Pg.450]

Enerhaug J. A Study of Localized Corrosion in Super Martensitie Stainless Steel Weldments, Dr. ing. Thesis, NTNU, Trondheim, 2002. [Pg.86]

EVALUATION OF WELDMENTS IN AUSTENITIC STAINLESS STEELS FOR CRYOGENIC APPLICATIONS ... [Pg.150]

Evaluation of Weldments in Austenitic Stainless Steels for Cryogenic Applications... [Pg.151]

Fig. 3. Fatigue growth rate properties of stainless steel base metals and weldments at 4 K. Fig. 3. Fatigue growth rate properties of stainless steel base metals and weldments at 4 K.
The mechanical strength (cTys, cTuts, and NTS) properties of various weldments in four stainless steels were found to be adequate and increased appreciably with decreasing temperature, in a manner analogous to their respective base metals. [Pg.158]

Armco Steel Corporation conducted comparison tests on two ferritic nickel alloy steels produced in the U. S. for cryogenic service and one USSR Fe-Cr-Mn austenitic stainless steel. These studies included base plate and weldment composition, microstructure, strength, and fracture toughness. Detailed results were reported at a Soviet-American seminar [ ]. This paper summarizes these earlier publications. [Pg.529]

D.G. Enos, S, R. Taylor. Influence of sulfate-reducing bacteria on alloy 625 and austenitic stainless steel weldments. Corrosion, Vol. 52, No. 11, pp. 831-842, 1996. [Pg.120]

See other pages where Weldments stainless steels is mentioned: [Pg.347]    [Pg.392]    [Pg.339]    [Pg.982]    [Pg.234]    [Pg.129]    [Pg.233]    [Pg.392]    [Pg.347]    [Pg.336]    [Pg.382]    [Pg.382]    [Pg.342]    [Pg.347]    [Pg.1556]    [Pg.1575]    [Pg.34]    [Pg.35]    [Pg.180]    [Pg.150]    [Pg.157]   
See also in sourсe #XX -- [ Pg.380 , Pg.381 ]



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