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ASTM B387-2018 pdf free download

ASTM B387-2018 pdf free download.Standard Specification for Molybdenum and Molybdenum Alloy Bar, Rod, and Wire
1. Scope
1.1 This specification covers unalloyed molybdenum and molybdenum alloy bar, rod, and wire as follows: 1.1.1 Molybdenum 360—Unalloyed vacuum arc-cast mo- lybdenum. 1.1.2 Molybdenum 361—Unalloyed powder metallurgy mo- lybdenum. 1.1.3 Molybdenum Alloy 363—Vacuum arc-cast molybde- num–0.5 % titanium–0.1 % zirconium (TZM) alloy. 1.1.4 Molybdenum Alloy 364—Powder metallurgy molyb- denum–0.5 % titanium–0.1 % zirconium (TZM) alloy. 1.1.5 Molybdenum 365—Unalloyed vacuum arc-cast molybdenum, low carbon. 1.1.6 Molybdenum Alloy 366—Vacuum arc-cast molybdenum, 30 % tungsten alloy. 1.2 This specification covers wire no smaller than 0.020 in. (0.51 mm) in diameter or of equivalent cross-sectional area. Specification F289 covers diameters up to 0.020 in. (0.51 mm). 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 The following precautionary caveat pertains only to the test method portions of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility ofthe user ofthis standard to establish appropriate safety, health, and environ- mental practices and determine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions ofTerms Specific to This Standard: 3.1.1 bar and rod, n—any straight product with a round, rectangular, hexagonal, or octagonal solid cross section, 4 in. (101.6 mm) in diameter or less, or ofequivalent cross-sectional area. 3.1.2 wire, n—any product furnished in coils or on spools or reels. 3.2 Lot Definition: 3.2.1 for chemical composition, n—the product of a single blend of powder or a single vacuum melted ingot. 3.2.2 for mechanical property measurement, n—the product manufactured from ingots sintered from either a single powder lot in a single sintering run in the same furnace or a single ingot, processed through the same processing equipment in a single uninterrupted run, using the same thermomechanical process to reach the same final size.
4. Ordering Information
4.1 Orders for material under this specification shall include the following information as applicable:4.1.1 Material number and temper designation (Section 1 and Table 3), 4.1.2 Product form (Section 3), 4.1.3 Chemical requirements (Table 1 and Table 2), 4.1.4 Metallurgical condition (Section 7), 4.1.5 Mechanical requirements (Section 8), 4.1.6 Thermal stability (Section 9), 4.1.7 Tolerances (Section 10 and Section 11 and Table 4), 4.1.8 Workmanship and quality level requirements (Section 12), 4.1.9 Disposition of rejected material (Section 14), 4.1.10 Certification and reports (Section 15), 4.1.11 Marking (Section 16), and 4.1.12 Packaging (Section 17).
5. Materials and Manufacture
5.1 The various molybdenum mill products covered by this specification shall be manufactured with the conventional extrusion, forging, swaging, rolling, and drawing equipment normally found in primary ferrous and nonferrous plants. The ingot metal for Molybdenum 360 and 365 and Molybdenum Alloys 363 and 366 is vacuum arc-melted in furnaces of a type suitable for reactive, refractory metals. For Molybdenum 361 and 364 the metal is consolidated by powder metallurgy methods.
6. Chemical Composition
6.1 The molybdenum and molybdenum alloy ingots and billets for conversion to finished products covered by this specification shall conform to the requirements of the chemical composition prescribed in Table 1. 6.2 Heat Analysis: 6.2.1 Heat analysis is made by the manufacturer ofthe metal on a representative sample of powder from a single powder blend in the case of material made from pressed and sintered powder billets, or on a representative sample of a cast ingot or intermediate product from that ingot in the case of material made from cast ingot. 6.2.2 Heat analysis shall be as specified in Table 1. 6.2.3 The manufacturer shall not ship material that is outside the limits specified in Table 1 for the applicable type, with the exception of oxygen and nitrogen, whose percentage may vary with the method of fabrication. 6.3 Check Analysis: 6.3.1 Check analysis is made by the purchaser or the manufacturer of the metal after it has been processed into finished mill forms, and is either to verify the heat analysis of a heat or lot, or to determine variations in composition within a heat or lot.

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