ASTM B617-98 (R2021) pdf free download.Standard Specification for Coin Silver Electrical Contact Alloy.
1.1 This specification covers 90% silver-Jo % copper alloy tubing, rod, wire, strip, and sheet material for electrical contacts.
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 arc not considered standard.
3. Manufacture
3.1 Raw materials shall be of such quality and purity that thc finished product will have the properties and characteristics prescribed in this specification.
3.2 The material shall be finished by such operations (cold working. heat treating, annealing, turning, grinding, or pickling) as are required to produce the prescribed properties.
4. Chemical Composition
4.1 Material produced under this specification shall meet the requirements for chemical composition prescribed in Table 1.
5. Mechanical Requirements
5.1 Mechanical properties shall conform to the listings of Table 2 or Table 3.
5.2 All test specimens shall be full thickness or diameter when practical.
5.3 All tests are to be conducted at room temperature, about
68°F (20°C).
6. General Requirements
6.1 The provisions of Specification B476 shall apply to all materials produced to this specification.
7. Inspection and Testing
7.1 Material furnished under this specification shall be inspected by the manufacturer as detailed in the applicable provisions of Specification B476 and as listed as follows:
7.1.1 Visual inspection at lOx.
7.1.2 Temper test (hardness or tension, but not both). A tension test is recommended for strip below 0.030-in. (0.8-mm) thickness and for wire of any diameter.
7.1.3 Dimensional tests.
7.1.4 Spectrographic or chemical analysis when indicated by the purchaser order.
8. Keywords
8. 1 arcing contacts; coin silver alloy: compositions: electrical contacts; impurities; precious metals; silver alloy; silver copper alloy
S1 Referenced Documents
S 1.1 The following documents of the issue in effect on date of material purchase form a part of’ this specification to the extent referenced herein:
S1.1.1 U. S. Federal Standards:
Fed. Sid. No. 102 Preservation. Packaging and Packing Levels
Fed. Sid. No. 123 Marking for Shipment (Civil Agencies)
S 1. 1 .2 U.S. Military Standards:
MIL-STD- 129 Marking for Shipment and Storage
S2. Quality Assurance
S 2. 1 Responsibility for Inspection—Unless otherwise specified in the contract or purchase order, the manufacturer is responsible for the performance of all inspection and test requirements specified. Except as otherwise specified in the contract or purchase order, the manufacturer may use his own or any other suitable facilities for the performance of the inspection and test requirements. unless disapproved by the purchaser at the time the order is placed. The purchaser shall have the right to perform any of the inspections and tests set forth when such inspections and tests are deemed necessary to assure that the material conforms to prescribed requirements.ASTM B617 pdf download.