Standard test specimens of zinc bronze (Cu88, Sn10, Zn2)--Parts I and II . C, Specimen 475; 2X. Ultimate tensile strength,19,800 pounds per square inch; elongation in 2inches, 3 per cent; reduction of area, 2 per cent D, Specimen 1023; 2X. Ultimate tensile strength,26,000 pounds per square inch; elongation in 2inches, per cent; reduction of area, per cent Fig. 16.—Surface appearance of tensile bars after rupture Standard Zinc-Bronze Test BarsTABLE 7—Continued 57 Speci-men Condition of bar Color of fracture Type ofbreak Microscopicexamination Physicalproperties 285 Finely pre
Standard test specimens of zinc bronze (Cu88, Sn10, Zn2)--Parts I and II . C, Specimen 475; 2X. Ultimate tensile strength,19,800 pounds per square inch; elongation in 2inches, 3 per cent; reduction of area, 2 per cent D, Specimen 1023; 2X. Ultimate tensile strength,26,000 pounds per square inch; elongation in 2inches, per cent; reduction of area, per cent Fig. 16.—Surface appearance of tensile bars after rupture Standard Zinc-Bronze Test BarsTABLE 7—Continued 57 Speci-men Condition of bar Color of fracture Type ofbreak Microscopicexamination Physicalproperties 285 Finely prellow plus or-ange in de-pressions. llntercrystal-1 line. [No oxide films; eutec-1 toid shattered. Coarse mesh for den- 1 41 670 21. SJ 19 000 301 f Smooth with fine trans-1 verse cracks. Slight roughening of [Yellowish {....do drites; eutectoidabundant; oxide 24 370 000 312 the surface; fractureis through three crys-tals of nearly sameorientation. Yellowplusalit-1 tie gray. llntracrystal-1 Ihie. Like No. 314, with lesseutectoid. Eutectoid abund
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashingtongovtprin
