76 



Copper and Copper-base Alloys 



200 400 600 800 1000 



Temperature^ Deg.F. 



1200 



Chart ISO. — The effect of elevated temperatures on the Izod- 

 impact strength of previously annealed common high brass (66.00 % 

 copper) according to D. Bunting.**' 



30 



40 50 



Shear S+rength, 1000 Lb. per 5q. In. 



Chart 151. — Conversion chart for determination of shear strength 

 of high brass (65.00 % copper, balance zinc) when tensile strength is 

 known. Accurate to +5%.'^''* 



TABLE 9 

 COMMON BRASS ROD 



Copper, 62.65%; lead, 0.03%; iron, trace; zinc, balance 



Property 



Rod 



Hard" Soft* 



Forgings 



Cold<^ 



Cold'' 



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 



Reduction of area, % ' . . . 



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



Rockv/ell hardness F, Jf e-in- bail, 60-kg. load 



Rockv/ell hardness B, He-in. ball, 100-kg. load 



Brinell hardness, 10-mm. ball, 500-kg. load 



Modulus of elasticity, p.s.i 



Melting point, °F 



Coefficient 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 

 Density, lb. per cu. in 



60 

 57 

 74 

 65 

 15 

 60 

 22 



104 

 86 



145 



47 

 12 

 16 

 16 

 15 

 60 

 75 

 17 

 77 

 35 

 71 



51-80 

 25-53 

 31-52 

 30-65 

 27-57 

 50-18 

 73-63 



87-100 



50-82 



83-135 



15,000,000 



1680 



0.0000205 



27.6 



71 

 0.304 



83 

 56 

 56 

 70 

 61 

 16 

 62 



103 



' Refers to rod cold-drawn 50 % and for rod under 1 



' Refers to a 1300°F. anneal (1 hr.). 



= Material cold-forged from soft rod (5-40 % reduction of area), 



' Material cold-forged from cold-worked condition (40 %). 



diameter with a ready-to-finish grain s 



