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ASTM B981-2019 pdf free download

ASTM B981-2019 pdf free download.Standard Specification for Low-Leaded Brass Rod, Bar, Wire, and Shapes
1. Scope
1.1 This specification establishes the requirements for low leaded brass rod, bar, wire, and shapes of any specified cross section produced from Copper Alloys UNS No. C36300, C36500, C37000, C37100 and C37700 suitable for high-speed screw machining applications. N OTE 1—Refer to Specification B124/B124M when purchasing bar or rod for forging production. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.3 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory 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.
4. Ordering Information
4.1 Include the following information when placing orders for product under this specification, as applicable: 4.1.1 ASTM specification designation and year of issue (Bxxx/BxxxM – XX). 4.1.2 Copper Alloy UNS No. designations (C36300, C36500, C37000, C37100, and C37700, see Section 6 and Table 1. 4.1.3 Temper (see Section 7 and Table 2 and Table 3). 4.1.4 Product cross section form (for example, round, hexagonal, square, etc.). 4.1.5 Dimensions (see Section 9). 4.1.6 How furnished: straight lengths or coils (see 5.2). 4.1.7 Edge contours (see Section 9).4.1.8 Quantity; total weight, footage, or number of pieces for each size. 4.2 The following options are available and shall be speci- fied at the time of placing the order when required: 4.2.1 Tensile test requirement for product 1 ⁄ 2 in. [12 mm] and over (see 8.2). 4.2.2 Certification (refer to Specifications B249/B249M or B250/B250M). 4.2.3 Mill Test Report (refer to Specifications B249/B249M or B250/B250M). 4.2.4 When product is purchased for agencies of the U.S. Government see Section 11.
5. Materials and Manufacture
5.1 Material—The material of manufacture shall be a cast billet of Copper Alloys UNS No. C36300, C36500, C37000, C37100 and C37700 and of such purity and soundness as to be suitable for hot extrusion into rod, bar, wire, and shaped products. 5.1.1 In the event that heat identification or traceability is required, the purchaser shall specify the details desired. N OTE 2—Due to the discontinuous nature of the processing of castings into wrought products, it is not always practical to identify a specific casting analysis with a specific quantity of finished material.5.2 Manufacture—Product produced under this specifica- tion shall be in straight lengths; however, it shall be furnished in coils when so specified in the contract or purchase order (see 4.1.6).
6. Chemical Composition
6.1 The product shall conform to the chemical composi- tional requirements specified in Table 1 for Copper Alloys UNS No. C36300, C36500, C37000, C37100 and C37700. 6.2 The UNS designated composition limits do not preclude the possible presence of other unnamed elements; however, analysis shall be made regularly only for the minor elements listed in Table 1, plus either copper or zinc, or plus all major elements except one. The major element that is not analyzed shall be determined by difference between the sum of those elements analyzed and 100 %. By agreement between producer or supplier and purchaser, analysis may be required and limits established for the elements not cited. Percentage content of elements shown as “remainder” (rem.) is calculated by differ- ence.

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