The Brasses 



65 



30 40 50 



Shear S+reng+h, lOOOLb. per Sq.ln. 



Chabt 114. — Conversion chart for determination of shear strength of cartridge brass (70.00 % copper, balance zinc) when tensile strength is known. 



Accurate to + 5 %.'"'' 



TABLE 7 

 DEEP-DRAWING BRASS 



General Data" — Strip 

 copper, 68.41%; lead, 0.01%; iron, trace; zinc, balance 



Property 



Hard" 



Soft" 



Tensile strength, p.s.i. (000 omitted) 



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) 



Elongation, % in 2 in 



Rockwell hardness F, He-in- ball, 60-kg. load : 



Rockwell hardness B, Jf 5-in. ball, 100-kg. load 



Rockwell hardness G, Y^^-va.. ball, 150-kg. load 



Rockwell hardness 15-T, J^g-in. ball, 15-kg. load 



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



Endurance limit, p.s.i. (000 omitted) 



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



Melting point, °F 



Density, lb. per cu. in 



Coefficient of expansion, per °C. from 25-300°C 



Electrical conductivity, % I.A.C.S., OST 



Thermal conductivity, B.t.u. per sq. ft. per ft. per hr. per °F., 68°F 



« Apply to strip only (all tests conducted on 0.040-in. stock>. 



» Refers to 6 B. & S. Nos., hard, 0.100-0.015 mm. grain size at ready-to-finish. 



•Refers to 1200*F. anneal (1 hr. at temperature). 



