ASTM B176-2018 pdf free download

ASTM B176-2018 pdf free download.Standard Specification for Copper-Alloy Die Castings
1. Scope
1.1 This specification establishes the requirements for copper-alloy die castings. The alloys specified are Copper Alloy UNS Nos. C85470, C85700, C85800, C86500, C87800, C99700, and C99750. 2 1.2 Units—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 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. General Requirements
3.1 The following sections of Specification B824 constitute a part of this specification. 3.1.1 Terminology (Section 3), 3.1.2 Number of Tests and Retests (Section 11) (Note to users: Paragraph 10.3 of Specification B824 applies only when mechanical requirements are specified in the purchase order.), 3.1.3 Test Methods (Section 13), 3.1.4 Significance of Numerical Limits (Section 14), 3.1.5 Inspection (Section 15), 3.1.6 Rejection and Rehearing (Section 16), 3.1.7 Certification (Section 17), 3.1.8 Test Report (Section 18), 3.1.9 Product Marking (Section 19), and 3.1.10 Supplementary Requirements. 3.2 In addition, when a section with a title identical to that referenced in 3.1, above, appears in this specification, it contains additional requirements which supplement those ap- pearing in Specification B824.
5. Ordering Information
5.1 Include the following information when placing orders for die castings under this specification as applicable: 5.1.1 Specification title, number, and year of issue, 5.1.2 Part name and number, 5.1.3 Copper Alloy UNS Number, 5.1.4 Quantity and delivery schedule, as required, 5.1.5 Engineering drawing of die casting, when required, giving all necessary dimensions and tolerances and showing latest revisions and allowances for machining, if any. Location ofejector pin marks or parting lines shall be at the option ofthe manufacturer unless specifically designated on the drawing. 5.1.6 When die castings are purchased for agencies of the U.S. Government the Supplementary Requirements of Speci- fication B824 may be specified. 5.2 The following requirements are optional and should be specified in the purchase order when required. 5.2.1 Inspection lot sampling (Section 9), 5.2.2 Soundness requirements (10.1), 5.2.3 Mechanical requirements (Section 7), 5.2.4 Special requirements (Section 10), 5.2.5 Certification (Specification B824), 5.2.6 Foundry test report (Specification B824), 5.2.7 Witness inspection (Specification B824), 5.2.8 Product marking (Specification B824), and 5.2.9 Packaging requirements (Section 12).
6. Chemical Composition
6.1 The castings shall conform to the requirements for major elements as shown in Table 1. 6.2 These specification composition limits do not preclude the presence of other elements. Limits may be established and analysis required for unnamed elements agreed upon between the manufacturer or supplier and the purchaser. Copper or zinc may be given as remainder and may be taken as the difference between the sum ofall elements analyzed and 100 %. When all named elements in Table 1 are analyzed, their sum shall be as specified in Table 2. 6.3 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. 6.4 If the producer’s or supplier’s method of composition control is acceptable, sampling for chemical analysis may be waived at the discretion of the purchaser.
9. Sampling
9.1 An inspection lot shall consist of the production from each die or compound die on each machine for each 24 h during the first week of normal operation and the production for each 48 h thereafter of normal operation. Any significant change in the machine, composition, die or continuity of operation shall be considered as the start of a new lot. Die castings inspected by this method shall be so marked or handled during the finishing operations as not to lose their identity. 9.2 Each die casting of a randomly selected sample shall be examined to determine conformance to the requirements with respect to general quality, dimensions and identification mark- ing. The producer or supplier may use a system of statistical quality control for such examinations.