ASTM B760-07(R2019) pdf free download

ASTM B760-07(R2019) pdf free download.Standard Specification for Tungsten Plate, Sheet, and Foil
1. Scope
1.1 This specification covers wrought unalloyed tungsten plate, sheet, and foil. 1.2 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. 1.3 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 of the user of this standard to establish appropriate safety, health, and environ- mental practices and determine the applicability of regulatory limitations prior to use. 1.4 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 Lot Definitions: 3.1.1 ingot, n—no definition required. 3.1.2 A manufacturing lot shall consist of a material of the same size, shape, condition, and finish produced from the ingot or powder blend by the same rolling reduction schedule and the same heat treatment parameters. Unless otherwise agreed between manufacturer and purchaser, a lot shall be limited to the product of an 8 h period for final continuous anneal, or to a single furnace load for final batch anneal. 3.1.3 A chemical analysis lot shall consist of a single powder blend in the case of products manufactured from pressed and sintered powder metallurgy shapes, or a single ingot in the case of products manufactured from ingot. 3.2 Product Forms: 3.2.1 foil, n—a flat product less than 0.005 in. (0.13 mm) in thickness. 3.2.2 plate, n—a flat product 0.188 in. (4.75 mm) or more in thickness. 3.2.3 sheet, n—a flat product from .005 in. (0.13 mm) to 0.187 in. (4.75 mm) in thickness.
4. Ordering Information
4.1 Orders for material under this specification shall include the following information: 4.1.1 Material identification and metallurgical condition (Section 7), 4.1.2 Product form (Section 3), 4.1.3 Chemical requirements (Table 1), 4.1.4 Tolerances (Section 9, Table 2, and Fig. 1), 4.1.5 Workmanship and quality level requirements (Section 10), 4.1.6 Packaging (Section 14), 4.1.7 Marking (Section 14), 4.1.8 Certification and reports (Section 13), and 4.1.9 Disposition of rejected material (Section 12).
5. Materials and Manufacture
5.1 The various tungsten flat products covered by this specification shall be formed with the conventional rolling, forging，or extrusion equipment， normally found in primary ferrous and nonferrous plants. 5.2 The ingot metal is consolidated employing either the powder metallurgy or vacuum-arc-casting process.
6. Chemical Composition
6.1 The tungsten ingots or 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 an analysis made by the manufacturer of the 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 Chemical lot analysis shall be as specifed in Table 1, with the exception of oxygen which shall be reported for information only, and not be required to meet the requirements of Table 1. 6.3 Check Analysis: 6.3.1 Check analysis is an analysis made by the purchaser or the manufacturer of the metal after it has been processed into finished mill forms, and is either for the purpose of verifying the composition of a heat or lot, or to determine variations in the composition within a heat or lot. 6.3.2 Check analysis tolerances do not broaden the specifed heat analysis requirements but cover variations between labo- ratories in the measurement of chemical content. 6.3.3 Check analysis limits shall be as specified in Table 1. 6.3.4 The manufacturer shall not ship material that is outside the limits specifed in Table 1.