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Unformatted text preview: SPECIFICATION FOR COMPOSITION BRONZE OR OUNCE METAL CASTINGS SB-62 (Identical with ASTM Specification B 62-93 for the alloy covered except for the deletion of Supplementary Requirements and editorial differences. Certification has been made mandatory.) 1. Scope 1.1 This specification establishes requirements for an alloy having a composition of copper, tin, lead, and zinc, used for component castings of valves, flanges, and fittings. The common trade name of this alloy is 85-5-5-5; the correct identification is Copper Alloy UNS No. C83600. 1.2 The castings covered are used in products that may be manufactured in advance and supplied from stock from the manufacturer or other dealer. 1.3 The values stated in inch-pound units are to be regarded as the standard. Metric values given in parentheses are for information only. 2.1.2 ASME Standard: SB-824 Specification for General Requirements for Copper-Alloy Castings 2.1.3 MSS Standard: SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions 3. General Requirements 3.1 Material furnished under this specification shall conform to the applicable requirements of Specification SB-824. 4. Ordering Information 4.1 Orders for castings under this specification shall include the following: 4.1.1 Quantity of castings required, 2. Applicable Documents 4.1.2 Copper Alloy UNS No. (Table 1), 4.1.3 Specification title, number, and year of issue, 4.1.4 Pattern or drawing number and condition (as-cast, machined, etc), 4.1.5 Chemical analysis of residual elements, if specified in the purchase order (Specification SB-824), 4.1.6 Pressure test requirements, if specified in the purchase order (Specification SB-824), 4.1.7 Soundness requirements, if specified in the purchase order (Specification SB-824), 4.1.8 Certification, if specified in the purchase order (Specification SB-824), 35 2.1 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent referenced herein: 2.1.1 ASTM Standards: B 208 Recommended Practice for Preparing Tension Test Specimens for Copper-Base Alloys for Sand Castings E 8 Tension Testing of Metallic Materials E 29 Recommended Practice for Indicating Which Places of Figures Are to Be Considered Significant in Specified Limiting Values E 54 Chemical Analysis of Special Brasses and Bronzes E 62 Photometric Methods for Chemical Analysis of Copper and Copper Alloys E 478 Chemical Analysis of Copper Alloys E 527 Practice for Numbering Metals and Alloys COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services SB-62 2001 SECTION II TABLE 2 TENSILE PROPERTIES Tensile strength, min., ksiA (MPaB) Yield strength,C min., ksiA (MPaB) Elongation in 2 in. or 50 mm, min. % A B TABLE 1 CHEMICAL REQUIREMENTS, COPPER ALLOY UNS NO. C83600 Major Elements Copper Tin Lead Zinc Nickel (incl Cobalt) Residual Elements Iron Antimony Sulfur Phosphorus Aluminum Silicon A Composition, % max (Except as Indicated) 84.0–86.0 4.0–6.0 4.0–6.0 4.0–6.0 1.0A Composition, % max (Except as indicated) 0.30 0.25 0.08 0.05 0.005 0.005 30 (205) 14 (95) 20 ksi p 1,000 psi. See Appendix. C Yield strength shall be determined as the stress producing an elongation under load of 0.5%, that is, 0.01 in. (0.25 mm) in a gage length of 2 in. (51 mm). 6. Mechanical Properties In determining copper minimum copper may be calculated as copper plus nickel. 6.1 Mechanical properties shall be determined from separately cast test bars and shall meet the requirements shown in Table 2. 7. 4.1.9 Foundry test report, if specified in the purchase order (Specification SB-824), 4.1.10 Witness inspection, if specified in the purchase order (Specification SB-824), 4.1.11 Packaging and Package Marking, if specified in the purchase order (Specification SB-824 and Section 10). 4.2 When material is purchased for agencies of the U.S. Government, the Supplementary Requirements in Specification SB-824 may be specified. Casting Repair 7.1 Castings shall not be repaired, plugged, welded, or burned-in. 8. Sampling 8.1 Copper Alloy UNS No. C83600 test bar castings shall be cast to the form and dimensions shown in Fig. 2, 3, or 4 of Practice B 208. 9. Certification 5. Chemical Requirements 9.1 The certification requirements of Specification B 824 are mandatory. 5.1 The alloy shall conform to the requirements for major elements specified in Table 1. 5.2 These specification limits do not preclude the presence of other elements. Limits may be established for unnamed elements by agreement between manufacturer or supplier and purchaser. Copper or zinc may be given as remainder and may be taken as the difference between the sum of all elements analyzed and 100%. When all major elements in Table 1 are analyzed, their sum shall be as follows: Copper plus major elements, 99.3% minimum 5.3 It is recognized that residual elements may be present in cast copper base alloys. Analysis shall be made for residual elements only when specified in the purchase order (Specification SB-824). 36 10. Packaging and Package Marking 10.1 Valves, flanges, and fittings shall be marked in accordance with the latest revision of the Standard Marking System for Valves, Fittings, Flanges, and Unions (No. SP-25) of the Manufacturers Standardization Society of the Valve and Fittings Industry, and in such position as not to injure the usefulness of the casting. 11. Keywords 11.1 copper-alloy castings; ounce metal castings; red brass castings; valve castings COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services PART B — NONFERROUS MATERIAL SPECIFICATIONS SB-62 APPENDIX (Nonmandatory Information) X1. METRIC EQUIVALENTS X1.1 The SI unit for strength properties now shown is in accordance with the International System of Units (SI). The derived SI unit for force is the newton (N), which is defined as that force which when applied to a body having a mass of one kilogram gives it an acceleration of one metre per second squared (N p kg · m / s2). The derived SI unit for pressure or stress is the newton per square metre (N/m2), which has been named the pascal (Pa) by the General Conference on Weights and Measures. Since 1 ksi p 6,894,757 Pa, the metric equivalents are expressed as megapascal (MPa), which is the same as MN/m2 and N/mm2. 37 COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services ...
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This note was uploaded on 10/04/2010 for the course ENGINEERS 22453175 taught by Professor Heydari during the Spring '08 term at Miami University.

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