The Leaded Brasses 



103 



30 



35 40 



Shear Streng+h, 1000 Lb.per Sq.ln. 



Chart 39. — Conversion chart for determination of shear strength 

 of leaded high brass (65.00 % copper, 0.90 % lead, balance zinc) when 

 tensile strength is known. Accurate to +5%.'*" 



0.002 0.004 0.006 0.008 0010 



S+rain^ Inches per In. 



Chart 40. — The effect of cold rolling on the stress-strain charac- 

 teristics of leaded high-brass rod (under 1 in. in diameter) previously 

 extruded to a grain size of 0.045 mm.; 100,000-lb. capacity hydraulic 

 testing machine and Templin automatic extensometer accurate to 

 0.00001 in. used. (63.89 % copper, 1.38 % lead, balance zinc.) 



TABLE 5 

 HEAVY -LEADED BRASS 



General Data — Strip" 

 Copper, 63.36%; lead, 2.79%; iron, 0.08%,; zinc, balance 



Property- 



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, }i6-™- ball, 60-kg. load 



Rockwell hardness B, J^e-™- ball, 100-kg. load 



Rockwell hardness G, He-in. ball, 150-kg. load 



Rockwell hardness 15-T, Y^^^-m.. ball, 15-kg. load 



Rockwell hardness 30-T, y{^-\TX. ball, 30-kg. load 



Charpy impact value, ft.-lb 



Young's modulus of elasticity, lb. per sq. ia 



Melting point, °F : 



Density, lb. per cu. in 



Ctoefficient 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., 68°F 



« All testa conducted on 0.040-in. stock. 



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



^ 1400°F. anneal (1 hr. at temperature) of material described in footnote a. 



Hard" 



Soft"^ 



