ASME SECTION II D-2008 pdf download

ASME SECTION II D-2008 pdf download.
1 INTRODUCTION The goal ofthis Guideline is to assistthe users ofSection II, Part D in locating materials in stress tables (Tables 1A, 1B, 2A, 2B, 3, 4, 5A, and 5B), tables of mechanical properties (Tables U, U-2, and Y-1), and tables ofphysical properties (Tables TE-1 throughTE-5, TCD, TM-1 through TM-5, and PRD). This Guideline defines the logic used to place materials within these tables. 2 STRESS TABLES Stress tables are all found within Subpart 1 of Section II, Part D. Tables 1A, 1B, 3, 5A, and 5B cover allowable stresses, while Tables 2A, 2B, and 4 cover design stress intensities. Although Subpart 1 also covers ultimate tensile strength and yield strength, the organization of those mechanical property tables will be discussed separately in para. 3. A table-by-table listing of the materials-organiza- tion logic used to place materials within the designated tables follows. 2.1 TABLE 1A Table1A provides allowable stresses forferrous 1 materi- als used in Section I; Section III, Division 1, Classes 2 and 3; Section VIII, Division 1; and Section XII construction. Within Table 1A, the first step in ordering materials is to use their nominal compositions. These nominal composi- tions are nothing more than accepted compositional fin- gerprints or widely recognized designators for each alloy or alloy class. These nominal compositions are arranged in Table 1A as follows: (a) carbon steels (b) carbon steels with small additions of Cb, Ti, and V (microalloyed steels)
Unfortunately, most specifications for materials do not give nominal compositions — and without that informa- tion, one may not know the nominal composition for a particular material in Table 1A. Ifthe specification number and alloy grade or type designation are known, then one can go to Table QW/QB-422 of Section IX of the Code and find the corresponding nominal composition. Now, for a given nominal composition, Table 1A is arrangedbyincreasing tensilestrength. Foragivennominal composition and tensile strength, stress listings are pro- vided in order of increasing specification number. Some- times, for a given nominal composition, tensile strength, yield strength, and specification number/grade or type, there may be more than one line of stresses. At this point, the Notes referenced on the second page of each page set within Table 1A will define why there are two or more lines of stresses and when each applies.
2.3 TABLE 2A Table 2A provides design stress intensities for ferrous materials for Section III, Division 1, Classes 1, TC, and SC construction. This table is organizedinthesame manner as Table 1A. Refer back to para. 2.1 for that description. 2.4 TABLE 2B Table 2B provides design stress intensities for nonfer- rous materials for Section III, Division 1, Classes 1, TC, and SC construction. Table 2B materials are ordered in the same manner as in Table 1B. Refer back to para. 2.2 for that description. 2.5 TABLE 3 Table 3 provides allowable stresses for bolting materials for use in Section III, Division 1, Classes 2 and 3; Section VIII, Division 1; Section VIII, Division 2 (using Part 4.16 of Section VIII, Division 2); and Section XII construction.
2.6 TABLE 4 Table 4 provides design stress intensities for bolting materials used in Section III, Division 1, Classes 1, TC, and SC; and in Section VIII, Division 2 (using Part 5 and Annex 5.F of Section VIII, Division 2). Table 4 is organized in the same manner as Table 3 — first covering ferrous materials and then nonferrous materi- als — except that Table 4 covers far fewer materials. For the ordering logic, again refer to paras. 2.1 and 2.2 for ferrous and nonferrous materials, respectively. 2.7 TABLE 5A Table 5A provides allowable stresses for ferrous materi- als for Section VIII, Division 2 construction. This Table is organized in the same manner as Table 1A. Refer back to para. 2.1 for that description. 2.8 TABLE 5B Table 5B provides allowable stresses for nonferrous materials for Section VIII, Division 2 construction. This Table is organized in the same manner as Table 1B. Refer back to para. 2.2 for that description. 3 MECHANICAL PROPERTY TABLES Ultimatetensile strengthvalues andyieldstrengthvalues are to be used in design calculations according to the rules of the Construction Codes. However, they are not to be construed as minimum strength values at temperature. This is explained in the General Notes to these tables. Para- graphs 3.1 through 3.3 provide a table-by-table listing of the materials-organization logic.