The Leaded Brasses 



97 



0.001 0.002 0.003 0.004 0005 0.006 0.007 0.008 

 S+rain, Inches per Inch 



Chaht 19. — The effect of cold rolling on thestress-straiu character- 

 istics of Lancashire brasa atrip (0.040 in. thick) having a ready-to-finiah 

 grain size of 0.065 mm.; 5,000-lb. capacity hydraiilic testing machine 

 and Templin automatic extenaometer accurate to 0.00001 in. used. 

 (73.53 % copper, 2.24 % lead, balance zinc.) 



200 400 600 800 1000 1200 1400 1600 

 Temperature, Deg.F. (1 Hr. at Temp.) 



Chabt 20. — The effect of elevated temperature on the tensile 

 strength, percentage reduction of area, and percentage elongation of a 

 leaded brasa (70.95 % copper, 1.10 % lead, balance zinc) according to 

 W. B. Price.'" 



TABLE 3 

 LEADED HIGH BRASS 



General Data — Strip" 

 Copper, 65.19%; lead, 1.09%; iron, 0.04%; zinc, balance 



Property 



Hard'' 



Soft' 



Tensile strength, p.s.i. (ODD omitted) 



Elongation, % in 2 in 



Apparent elastic limit, p.s.i. (000 omitted) 



Yield strength, 0.5% extension, p.s.i. (000 omitted) 



Yield strength, 0.2% offset, p.s.i. (000 omitted) 



Yield strength, 0.1 % offset, p.s.i. (000 omitted) 



Rockwell hardness F, Ke-in- ball, 60-kg. load 



Rockwell hardness B, Jf g-in. ball, 100-kg. load 



Rockwell hardness 15-T, Ke-i^- ball, 15-kg. load 



Rockwell hardness 30-T, Ke-in- ball, 30-kg. load 



Young's modulus of elasticity, p.s.i 



Melting point, "F 



Density, lb. per cu. in 



C!oefEcient of expansion, per °C. from 25-300°C 



Electrical conductivity, % I.A.C.S., 68°F 



Thermal conductivity, B.t.u. per sq. ft. per ft. per hr. per "F 



«» All tests conducted on 0.040-in. stock. 



' 6 B. & S. Nos., hard, 0.080-0.015 mm., grain size at ready-to-finish. 



* 1200°F. anneal (1 hr. at temperature) of material described in footnote t 



