Fig. 14 Copper alloy 26000 (cartridge brass, 70%) sheet, hot rolled to a thickness of 10 mm (0.4 in.), annealed, cold rolled to a thickness of 6 mm (0.239 in.), and annealed to a grain size of 0.120 mm (0.005 in.). At this reduction, grains are basically equiaxed. Compare with Fig. 15 More

Fig. 27 Two tensile bars of cartridge brass: one tested to failure, showing low ductility; other not tested. Rough “orange-peel” surface texture on the outside of the tested sample is another macroscale indication of a very large grain size. More

Fig. 21 Swaging a ferrule from tube stock (alloy C26000, cartridge brass, quarter hard, 0.032 in.) in preference to press forming. The change from press forming to swaging lowered tooling costs and resulted in a 50% increase in production. Dimensions given in inches More

Fig. 21 Annealed cartridge brass (Cu-30%Zn). (a) Taper section (horizontal magnification, 600×; vertical magnification, 4920×) of surface damage from abrasion with 220-grit silicon carbide paper. (b) Micrograph taken after abrasion on 220-grit silicon carbide paper and then polished until More

Fig. 19 Effect of annealing temperature (for 1 h) on properties of cartridge brass (C26000; 70%Cu-30%Zn) strip after a finish rolling reduction of 40.6%. Source: Heat Treating , Vol 4, ASM Handbook , 1991 More

Fig. 16 Effect of cold work on recrystallized grain size in cartridge brass More

Fig. 27 The microstructure of two common brasses. (a) C26000 (cartridge brass, 70Cu-30Zn), hot rolled, annealed, cold rolled 70% and annealed at 638 °C (1180 °F), showing equiaxed grains of copper solid solution. (Some grains are twinned). 75×. (b) C28000 (Muntz metal, 60Cu-40Zn) ingot More

Fig. 14 The microstructure of annealed cartridge brass (70Cu-30Zn), illustrating both grain boundaries and annealing twins. The twins are the regions with parallel sides within the grains. Source: Ref 1 More

Fig. 33 Alloy C26000 (cartridge brass), processed to obtain specific grain size. Preliminarily hot rolled, annealed, cold rolled, annealed to a grain size of 25 μm, cold rolled to 70% reduction. Final anneal at 330 °C (625 °F) for 5 μm grain size. Etchant 1, Table 2 . 75× More

Fig. 34 Alloy C26000 (cartridge brass), processed to obtain specific grain size. Preliminarily hot rolled, annealed, cold rolled, annealed to a grain size of 25 μm, cold rolled to 70% reduction. Final anneal at 370 °C (700 °F) for 10 μm grain size. Etchant 1, Table 2 . 75× More

Fig. 35 Alloy C26000 (cartridge brass), processed to obtain specific grain size. Preliminarily hot rolled, annealed, cold rolled, annealed to a grain size of 25 μm, cold rolled to 70% reduction. Final anneal at 405 °C (760 °F) for 15 μm grain size. Etchant 1, Table 2 . 75× More

Fig. 36 Alloy C26000 (cartridge brass), processed to obtain specific grain size. Preliminarily hot rolled, annealed, cold rolled, annealed to a grain size of 25 μm, cold rolled to 70% reduction. Final anneal at 425 °C (800 °F) for 20 μm grain size. Etchant 1, Table 2 . 75× More

Fig. 22 Copper alloy 26000 (cartridge brass, 70%) sheet, hot rolled to a thickness of 10 mm (0.4 in.), annealed, cold rolled to a thickness of 6 mm (0.230 in.), and annealed to a grain size of 0.120 mm (0.005 in.). At this reduction, grains are basically equiaxed. Compare with Fig. 23 More

Fig. 24 Wrought cartridge brass (Cu-30%Zn) cold reduced 50% and annealed at 704 °C (1300 °F) for 30 min. Fully recrystallized and grown, equiaxed face-centered cubic grains with annealing twins. (a) Etched with equal parts ammonium hydroxide and hydrogen peroxide (3%). (b) The specimen More

Fig. 42 Wrought cartridge brass (Cu-30%Zn) cold reduced 50% and annealed at 704 °C (1300 °F) for 30 min to produce a fully recrystallized, coarse-grained, equiaxed, face-centered cubic grain structure with annealing twins. Tint etched with Beraha's PbS. Viewed with polarized light More

Fig. 23 Alloy C26000 (cartridge brass), cast, slowly cooled, and quenched. Primary dendrites aligned in ⟨100⟩ crystallographic directions. The fine, quenched structure has the same orientation as the coarse dendrites. Etchant 1, Table 2 , then electropolished with electrolyte 1, Table 4 . 30× More

Fig. 24 Alloy C26000 (cartridge brass), same processing as in Fig. 23 . Higher magnification shows that fine dendrites originate in the coarse ones and have the same orientation. Dendrites starting in directions that are not ⟨100⟩ do not grow very far. Same etchant and electrolyte as in Fig More

Fig. 25 Alloy C26000 (cartridge brass) drawn cup, showing “orange peel” (rough surface). See Figure 27 for grain structure. Etchant 1, Table 2 . Actual size More

Fig. 26 Alloy C26000 (cartridge brass) drawn cup, with a smooth surface. See Figure 28 for structural details. Etchant 1, Table 2 . Actual size More

Fig. 29 Alloy C26000 (cartridge brass), hot rolled to 10 mm (0.4 in.) thick, annealed to a grain size of 15 μm, cold rolled to 40% to 6 mm (0.24 in.) thick, and annealed to a grain size of 120 μm. Diagram in lower left corner of micrograph indicates the view relative to the rolling plane More