Standard test specimens of zinc bronze (Cu88, Sn10, Zn2)--Parts I and II . j Speci-men Condition of bar o Color of fracture Type ofbreak b Microscopicexamination c Physicalproperties * Finely crinkled. Rather brown. 109 263 rSmooth with fine trans- 1 verse cracks. Earthy yellow. [Intracrystal-I line. .do. Crinkled Bright yellow. {Eutectoid moderate inamount; dendritesmedium mesh.{Dendrites fine mesh;eutectoid abundant;pits common; trace ofoxide film; eutec-toid abundant. 33 800 42 00016 000 2a 5 2ao o The descriptive terms used are illustrated by Fig. i6. & Intracry
Standard test specimens of zinc bronze (Cu88, Sn10, Zn2)--Parts I and II . j Speci-men Condition of bar o Color of fracture Type ofbreak b Microscopicexamination c Physicalproperties * Finely crinkled. Rather brown. 109 263 rSmooth with fine trans- 1 verse cracks. Earthy yellow. [Intracrystal-I line. .do. Crinkled Bright yellow. {Eutectoid moderate inamount; dendritesmedium mesh.{Dendrites fine mesh;eutectoid abundant;pits common; trace ofoxide film; eutec-toid abundant. 33 800 42 00016 000 2a 5 2ao o The descriptive terms used are illustrated by Fig. i6. & Intracrystalline, through the crystals; intercrystalline. betwee^i them. c Theterms fine and coarse as applied to the dendritic structvire are relative, ,5and taken as standard. Fig. 14, D, also illustrates the usual amoiuit of eutectoid to be expected. d Recordedin order: Ultimate strength in povinds per squareinchi elastic limit in pounds per square inch;per cent elongation in 2 inches; per cent reduction of area. Bureau of Standards Technologic Paper No. 59. A, Specimen 36; 2X. Ultimate tensile strength,42,450 povmds per square inch; elongation in 2inches, per cent; reduction of area, 20 percent ipw iHJi Sm S ^^ m iP w ^p^l w B, Specimen 404; 2X. Ultimate tensile strength, pounds per square inch; elongation in 2inches, per cent; reduction of area, percent
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashingtongovtprin
