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Unformatted text preview: SPECIFICATION FOR COPPER ALLOY SAND CASTINGS FOR GENERAL APPLICATIONS SB-584 (Identical with ASTM Specification B 584-93b for the alloys covered except that casting repair has been introduced. Certification and marking have been made mandatory.) 1. Scope 1.1 This specification establishes requirements for copper alloy sand castings for general applications. Nominal compositions of the alloys defined by this specification are shown in Table 1. This is a composite specification replacing former documents as shown in Table 1. NOTE 1 — Other copper alloy castings are included in the following ASME specifications: B 61, B 62, B 148, B 271, B 369, and B 505. 2.1.1 ASTM Standards: B 208 Practice for Preparing Tension Test Specimens for Copper Base Alloys for Sand, Permanent Mold, Centrifugal, and Continuous Castings E 527 Practice for Numbering Metals and Alloys (UNS) 1.2 The values stated in inch-pound units are to be regarded as the standard. Metric values given in parentheses are provided for information purposes only. 2. Referenced Documents 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: 2.1.2 ASME Standards: SB-61 Specification for Steam or Valve Bronze Castings SB-62 Specification for Composition Bronze or Ounce Metal Castings SB-148 Specification for Aluminum Bronze Sand Castings SB-271 Specification for Copper-Base Alloy Centrifugal Castings SB-369 Specification for Copper-Nickel Alloy Castings SB-505 Specification for Copper-Base Alloy Continuous Castings SB-824 Specification for General Requirements for Copper Alloy Castings TABLE 1 NOMINAL COMPOSITIONS Classification Leaded semi-red brass Leaded tin High-lead tin bronze Leaded nickel bronze Copper Alloy UNS No. C84400 C92200 C93700 C97600 Previous Designation B 145-5A B 143-2A B 144-3A B 149-11A Commercial Designation valve composition 81-3-7-9 steam or valve bronze-Navy “M” 80-10-10 20% leaded nickel silver Copper 81 88 80 64 Tin 3 6 10 4 Lead 7 1 1 ⁄2 10 4 Zinc 9 41⁄2 ... 8 Nickel ... ... ... 20 760 COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services PART B — NONFERROUS MATERIAL SPECIFICATIONS SB-584 3. General Requirements 6. Mechanical Properties 3.1 Material furnished under this specification shall conform to the applicable requirements of Specification SB-824. 6.1 Mechanical properties shall be determined from separately cast test bar castings, and shall meet the requirements shown in Table 4. 4. Ordering Information 7. Casting Repair 4.1 Orders for castings under this specification shall include the following information: 4.1.1 Quantity of castings required, 4.1.2 Copper alloy UNS number (Table 2), 4.1.3 Specification title, number, and year of issue, 4.1.4 Pattern or drawing number, and condition (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 (see Specification SB-824), 4.1.8 Repair of castings (Section 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 Product marking, if specified in the purchase order (Specification SB-824). 7.1 The castings shall not be repaired, plugged, welded, or “burned in” unless permission from the purchaser has been previously secured. This will be given only when defects are such that after the approved repair the usefulness and strength of the castings has not been impaired. 7.2 Alloys in this specification are generally weldable. Preparation for repair welding shall include inspection to assure complete removal of the defect. Repairs shall be made utilizing welding procedures qualified in accordance with Section IX of the ASME code and repair welding shall be done by welders or welding operators meeting the qualification requirements of ASME Section IX. The following records shall be maintained. 7.2.1 A sketch or drawing showing the dimensions, depth, and location of excavations, 7.2.2 Post weld heat treatment, when applicable, 7.2.3 Weld repair inspection results, 7.2.4 Casting identification number, 7.2.5 Weld procedure identification number, 5. Chemical Composition 7.2.6 Welder Identification, and 7.2.7 Name of inspector. 5.1 The castings shall conform to the requirements for major elements shown in Table 2. 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 named elements in Table 2 are analyzed, their sum shall be as specified in Table 3. 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). 761 8. Sampling 8.1 Test bar castings for all alloys listed in this specification shall be cast to the form and dimensions shown in Figs. 2, 3, or 4 of Practice B 208. 8.2 For small remelts, the lot size shall not exceed 1000 lb (455 kg) of castings and shall consist of all of the metal from a single master heat poured from an individual melting unit or group of melting units COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services SB-584 COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services TABLE 2 CHEMICAL REQUIREMENTS Composition, % max Except as Indicated Major Elements Residual Elements 2001 SECTION II 762 Tin 2.3–3.5 5.5–6.5 9.0–11.0 3.5–4.5 6.0–8.0 1.0–2.0 8.0–11.0 3.0–5.0 7.0–10.0 3.0–5.0 0.8 3.0–9.0 ... ... ... 1.5 1.0A 1.0A 1.0A 19.0–21.5 ... ... ... ... ... ... ... ... ... ... ... ... 0.40 0.25 0.15 ... Lead Zinc Iron Iron Copper Alloy UNS No. Aluminum Manganese Silicon Antimony 0.25 0.25 0.55 0.25 Copper Nickel incl. Cobalt Nickel incl. Copper ... ... ... ... Sulfur 0.08 0.05 0.08 0.08 Phosphorus 0.02 0.05 0.15 0.05 Aluminum 0.005 0.005 0.005 0.005 Manganese ... ... ... 1.0 Silicon 0.005 0.005 0.005 0.15 C84400 C92200 C93700 C97600 78.0–82.0 86.0–90.0 78.0–82.0 63.0–67.0 NOTE: A In determining copper minimum, copper may be calculated as copper plus nickel. PART B — NONFERROUS MATERIAL SPECIFICATIONS TABLE 3 SUM OF ALL MAJOR ELEMENTS ANALYZED Copper Alloy UNS Number C84400 C92200 C93700 C97600 Copper Plus Major Elements, % Minimum 99.2 99.4 99.0 99.0 SB-584 TABLE 4 MECHANICAL REQUIREMENTS Copper Alloy UNS No. C84400 C92200 C93700 C97600 Tensile Strength min, ksiB 29 34 30 40 Yield StrengthA min, ksiB 13 16 12 17 Elongation in 2 in., min, % 18 22 15 10 NOTES: A Yield strength shall be determined as the stress producing an elongation under load of 0.5%, that is, 0.01 in. in a gage length of 2 in. B ksi p 1000 psi. operating during the course of one-half shift, not to exceed 5 h. 9.2 When castings of Copper Alloy UNS Nos. C84400, C92200, C93700, or C97600 are specified, the certification requirements of Specification SB-824 are mandatory. 9. Certification 9.1 Component-part alloy castings produced to this specification may be manufactured in advance and supplied from stock. In such cases, manufacturer shall maintain a general quality certification of all castings, without specific record or date of casting of a specific component part. 10. Keywords 10.1 copper alloy castings; copper-base alloy castings; sand castings 763 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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