ASTM B379-04 pdf free.Standard Specification for Phosphorized Coppers—Refinery Shapes.
Preparation of the analytical specimen shall be theresponsibility of the reporting laboratory.
i4.2 Electrical Resistivity:The specimen shall conform to the requirements ofthe Test Specimens section of Test Method B 193 and at leasttwo specimens shall be prepared.Each test specimen shall originate as a single piece oran appropriate size cut from a separate portion piece，whenpossible, selected in 12.1.2.Alternatively, the manufacturer shall have the optionof sampling the molten metal during the casting period bypouring at least two castings of suitable size.The test specimens shall be forged or hot rolled.The external oxide shall be removed and the specimens colddrawn into a wire approximately 0.080 in. (2.03 mm) indiameter (12 gage AWG) and of a length adequate for the test.A specimen shall be cut from one end of each wire and be ofa length sufficient to accommodate the testing equipment,annealed at approximately 932F (500°C) for 30 min in aninert atmosphere, and rapidly cooled to ambient temperaturewithout undue exposure to air.Hydrogen Embrittlement: The test specimens shall originate as a single piececut from a portion piece selected in 12.1.2.The test specimen shall be forged or hot rolled.Theexternal oxide shall be removed and the specimen cold drawninto a wire approximately 0.080 in. (2.03 mm) in diameter (12gage AWG) and of a length adequate for the test. Not less thantwo specimens shall be cut from one end of the wire and be ofa length sufficient to accommodate the testing equipment.14.3.2.1 Alternatively,test specimens may be taken fromthe unused portion of the unannealed wire prepared for theelectrical resistivity test.The test specimens shall be annealed in an atmo-sphere containing not less than 15 %，volume/volume，ofhydrogen for 20 to 40 min in a furnace held at 1472 to 1607°F(800 to 875C) and then rapidly cooled to ambient temperaturewithout undue exposure to air.Microscopical Examination:Test specimen preparation shall be in accordancewith Methods E 8.ASTM B379 pdf download.