AISI

Waveguides 4 waveguides (points 5L-8L,. I), made of AISI 304 stainless steel, L = variable, (j>=6 mm, have been installed on the lower body of the SH header of unit 3 and 8 waveguides (points 2A-5A and points 2P-5P,y5. 2), made of AISI 304 stainless steel, L = 3240 mm, if>=6 mm, have been installed on the front (4 waveguides) and rear (4 waveguides) bodies of the SH header of unit 4. 

Air sparging Air thane Air toxics Airwick AISI1010 [112725-33-6] AISI304 [11109-50-5] AISI430 [11109-52-7] AISI 4820 [35724-97-5]... 

Mating material AISI 1018 Steel, Rc20,16AA 689 kPa = 100 psi. 

Unfilled Teflon PFA has been tested in mechanical appHcations using Teflon FEP-100 as a control (24). Tests were mn on molded thmst bearings at 689.5 kPa (100 psi) against AISI 1080, Rc 20,16AA steel, and at ambient conditions in air without lubrication. A limiting PV value of 5000 was found. Wear factors and dynamic coefficients of friction are shown in Table 4. 

This behef is supported by the results of burst tests on tubular specimens made of AISI 4335 tempered to various fracture toughness levels from... 

Relaxation of the residual stresses induced by autofrettage at 720 MPa (104,400 psi) in reactor tubes k = 2.4), of AISI 4333 M6 at a uniform temperature of 300°C has been studied and it was concluded, on the basis of creep tests for 10,000 h, that after 5.7 years 60% of the original stress would remain (161). 

Many initiators attack steels of the AISI 4300 series and the barrels of the intensifiers, which are usually of compound constmction to resist fatigue, have an inner liner of AISI 410 or austenitic stainless steel. The associated small bore pipework and fittings used to transfer the initiator to the sparger are usually made of cold worked austenitic stainless steel. The required pumping capacity varies considerably from one process to another, but an initiator flow rate 0.5 L / min is more than sufficient to supply a single injection point in a reactor nominally rated for 40 t/d of polyethylene. 

Fig. 8. Stress—rupture curves for annealed H-grade austenitic stainless steels. AISI numbers are given (see Table 3). Rupture iu 10,000 h (35). To convert...

Steels iu the AISI 400 series contain a minimum of 11.5% chromium and usually not more than 2.5% of any other aHoyiag element these steels are either hardenable (martensitic) or nonhardenable, depending principally on chromium content. Whereas these steels resist oxidation up to temperatures as high as 1150°C, they are not particularly strong above 700°C. Steels iu the AISI 300 series contain a minimum of 16% chromium and 6% nickel the relative amounts of these elements are balanced to give an austenitic stmcture. These steels caimot be strengthened by heat treatment, but can be strain-hardened by cold work. 

AISI 321 and 347 are stainless steels that contain titanium and niobium iu order to stabilize the carbides (qv). These metals prevent iatergranular precipitation of carbides during service above 480°C, which can otherwise render the stainless steels susceptible to iatergranular corrosion. Grades such as AISI 316 and 317 contain 2—4% of molybdenum, which iacreases their creep—mpture strength appreciably. In the AISI 200 series, chromium—manganese austenitic stainless steels the nickel content is reduced iu comparison to the AISI 300 series. 

The highly aHoyed austenitic stainless steels are proprietary modifications of the standard AISI 316 stainless steel. These have higher creep—mpture strengths than the standard steels, yet retain the good corrosion resistance and forming characteristics of the standard austenitic stainless steels. Nickel-Base Superalloys. 

J. J. Poveromo, "AISI Survey of Blast Eumace Pellet Properties," in Proceedings, 52nd Ironmaking Conference, AIME-ISS, Dallas, Tex., 1993. 

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. 

Steels Products Manual—Elat Rolled Electrical Steel, American Iron and Steel Institute (AISI), Washington, D.C., 1978. 

Ni, Pd)-Si-B powder, tape, RS foil AISI 300 series honeycomb stmctures. 

Table 3. Standard Numerical AISI-SAE Designations of Plain Carbon and Constructional Alloy Steels...

The AISI (American Iron and Steel Institute) and the SAE (Society of Automotive Engineers) specifications are essentially the same. The Hst is simplified to show typical compositions. Eor ranges, see original tables. 

In identifying a particular steel, the letters x are replaced by two digits representing average carbon content. Eor example, an AISI 1040 steel would have an average carbon content of 0.40%, with a tolerance of 0.03%, giving a range of 0.37—0.44% carbon. 

Steels that fah within the AISI definition have been standardized and classified jointiy by AISI and SAE (see Table 3). These represent by far the largest ahoy steels production and are generahy known as AISI ahoy steels. They are also referred to as constmctional ahoy steels. 

The effect of the ahoying elements on AISI steels is indirect because ahoying elements control microstmcture through their effect on hardenabhity. These elements permit the attainment of desirable microstmctures and properties over a much wider range of sizes and sections than is possible with carbon steels. 

Germany, the United Kingdom, and the United States shared ahke in the early development of stainless steels. In the United Kingdom in 1912, during the search for steel that would resist fouling in gun barrels, a corrosion-resistant composition containing 12.8% chromium and 0.24% carbon was reported. It was suggested that this composition be used for cutiery. In fact, the composition of AISI Type 420 steel (12—14% chromium, 0.15% carbon) is similar to that of the first corrosion-resistant steel. 

The standard AISI types with the Unified Numbering System (UNS) designation are identified in Table 4. A number of proprietary types have not been Hsted. These are for specific uses, which justify their substantial cost. 

Ferritic steels Stainless steels AISI type... 

AISI tool steel type Chemical composition, nominal % ... 

Fig. 4. Microstructure of AISI T15 tool steel (quenched and tempered) produced (a) from particles and (b) by the conventional technique (picral etch). In (a), the median and maximum carbide sizes are 1.3 and 3.5 mm, respectively in (b), 6.2 and 34 mm, respectively.

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