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Steels cryogenic

In the following, the physical metallurgy of the Fe-Mn system is briefly reviewed, with emphasis on properties that differ from the Fe-Ni system and therefore impede the development of Fe-Mn cryogenic steels. Several recent and on-going alloy development projects are described, with examples taken from work in the Soviet Union, the United States, and Japan. [Pg.91]

A final area of active research in the substitution of Mn for Ni in cryogenic steels concerns the development of austenitic weld wire for 9% Ni steel. In current practice 9Ni steel is welded with high-Ni (70 to 80%) weld wire, resulting in a significant increase in the cost of welded structures. Some success recently has been obtained in research on low-Ni ferritic weld compositions, particularly for use in TIG welding and low-Ni, Cr-Mn-stabilized austenitic filler metals are... [Pg.100]

Table I. Chemical Analyses, Tensile Properties, and Charpy V-Notch Impact Properties of Cryogenic Steel Base Plates... [Pg.531]

Table IIL Crack Opening Displacement (COD) of Cryogenic Steel Base Plates and Weldments ... [Pg.537]

Fig. 4. Crack growth resistance curves for cryogenic steels at -170°C (duplicate tests). Aaeffective effective crack length. Fig. 4. Crack growth resistance curves for cryogenic steels at -170°C (duplicate tests). Aaeffective effective crack length.
Cryogenics We use several types of evacuated stainless steel cryostats of about 1 htre capacity to provide the 77 K cooling with hquid nitrogen. The simplest, best valued and easiest to handle one is a ordinary thermos flask available from the supermarket (see fig.3). It is sufficient for a measurement period of more than 12 hours. A specially designed stainless steel vessel gains cooling periods of 30 hours. [Pg.300]

Handling and Safety Factors. Oxygen difluoride can be handled easily and safely in glass and in common metals such as stainless steel, copper, aluminum. Monel, and nickel, from cryogenic temperatures to 200°C (4). At higher temperatures only nickel and Monel are recommended. The compatibihty of OF2 with process equipment depends largely on the cleanliness of the equipment contaminants such as dkt, moisture, oil, grease, scale... [Pg.220]

Because of the low viscosities of cryogenic Hquids, rolling element bearings seem better suited than hydrodynamic bearings for turbo pumps. AISI 440C stainless balls and rings generally are preferred for their corrosion resistance over the more commonly used AISI 52100 steel. [Pg.253]

Austenitic steels that are used for nonmagnetic and cryogenic appHcations have lower carbon content than Hadfteld steels and range in composition from 15 to 29% manganese (30). [Pg.496]

It is possible to design a hydrostatic test in such a way that it probably will be a proof test of the vessel. This usually requires, among other things, that the test be run at a temperature as low as and preferably lower than the minimum operating temperature of the vessel. Proof tests of this type are run on vessels built of ultrahigh-strength steel to operate at cryogenic temperatures. [Pg.1027]

Structural Properties at Low Temperatures It is most convenient to classify metals by their lattice symmetiy for low temperature mechanical properties considerations. The face-centered-cubic (fee) metals and their alloys are most often used in the construc tion of cryogenic equipment. Al, Cu Ni, their alloys, and the austenitic stainless steels of the 18-8 type are fee and do not exhibit an impact duc tile-to-brittle transition at low temperatures. As a general nile, the mechanical properties of these metals with the exception of 2024-T4 aluminum, improve as the temperature is reduced. Since annealing of these metals and alloys can affect both the ultimate and yield strengths, care must be exercised under these conditions. [Pg.1127]

Nickel Steel Low-carbon 9 percent nickel steel is a ferritic alloy developed for use in cryogenic equipment operating as low as —I95°C (—320°F). ASTM specifications A 300 and A 353 cover low-carbon 9 percent nickel steel (A 300 is the basic specification for low-temperature ferritic steels). Refinements in welding and (ASME code-approved) ehmination of postweld thermal treatments make 9 percent steel competitive with many low-cost materials used at low temperatures. [Pg.2464]

Cryogenic -273 to -20°C Copper alloys Austenitic (stainless) steels Aluminium alloys Superconduction Rocket casings, pipework, etc. Liquid O2 or N2 equipment... [Pg.195]

Carbon steel piping, valves, structurals and vessels operating at cryogenic and ambient temperatures. [Pg.251]

Use fully killed or fine grain steel, controlled rolling temperatures high Mn/C ratios eliminate sharp corners in design, remove defects from steel heat treat steel. For cryogenic operations use high nickel alloy steels or austenitic stainless steels, depending on temperature. [Pg.251]

Precipitation, 425/870 C at cryogenic components, trays steels, except the chromium carbides extra low carbon... [Pg.253]

Gray cast irons do not have the abrupt ductile to brittle fraction transition down to -40°C as takes place in steels. Special austenitic nodular cast iron similar to the AUS 203 grade, but with a higher manganese content of about 4%, has been obtained for cryogenic purposes for temperatures down to -253°C. [Pg.60]

Figure 13.3 Schematic diagram of the parallel cryogenic trap MDGC-IR-MS system A, splitless injection port B, RC-5 non-polar first-stage separation column C, HP 5970B MSD D, HP 5965B IRD E, four-poit two-way valve (300 °C maximum temperature) F, external auxiliary earner gas G, six-poit selection valve (300 °C maximum temperature) H, stainless-steel cryogenic caps I, tliree-poit two- way valve (300 °C maximum temperature) ... Figure 13.3 Schematic diagram of the parallel cryogenic trap MDGC-IR-MS system A, splitless injection port B, RC-5 non-polar first-stage separation column C, HP 5970B MSD D, HP 5965B IRD E, four-poit two-way valve (300 °C maximum temperature) F, external auxiliary earner gas G, six-poit selection valve (300 °C maximum temperature) H, stainless-steel cryogenic caps I, tliree-poit two- way valve (300 °C maximum temperature) ...
Collected in stainless steel canister preconcentrated by cryogenic trapping thermally desorbed... [Pg.235]


See other pages where Steels cryogenic is mentioned: [Pg.813]    [Pg.91]    [Pg.98]    [Pg.98]    [Pg.100]    [Pg.535]    [Pg.813]    [Pg.91]    [Pg.98]    [Pg.98]    [Pg.100]    [Pg.535]    [Pg.195]    [Pg.568]    [Pg.89]    [Pg.277]    [Pg.388]    [Pg.429]    [Pg.151]    [Pg.77]    [Pg.79]    [Pg.80]    [Pg.477]    [Pg.46]    [Pg.316]    [Pg.6]    [Pg.326]    [Pg.336]    [Pg.441]    [Pg.1135]    [Pg.16]    [Pg.192]    [Pg.448]    [Pg.88]   
See also in sourсe #XX -- [ Pg.813 ]




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