The Brasses 



69 



TABLE 8 

 COMMON HIGH BRASS 



General Data — Rod 

 Chopper, 64.87%; lead, trace; iron, trace; zinc, balance 



Property 



TensUe 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) 



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



Rockwell hardness B, Ke-in- ball, 100-kg. load 



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



Modulus of elasticity, p.s.i 



Rod 



Forgings 



General Data — Strtp' 

 Copper, 66.49%; lead, 0.04%; iron, 0.02%; zinc, balance 



Property 



Softs 



Tensile strength, p.s.i. (000 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, ^6"™- ball, 100-kg. load 



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



Rockwell hardness 15-T, Ke-in. ball, 15-kg. load. . . 

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

 Endurance limit (at 10' reversals) :<'•*> 



Soft, p.s.i. (000 omitted) 



4 B. & S. Nos., p.s.i. (000 omitted) 



8 B. & S. Nos., hard, p.s.i. (000 omitted) 



10 B. & S. Nos., hard, p.s.i. (000 omitted) 



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



Melting point, °F 



Density, lb. per cu. in 



Physical Data 



Melting point, °F 1700 



Coefficient of expansion, per °C. from 25-300°C 0.0000202 



Electrical conductivity,"" % I.A.C.S., 68°F 26.4 



Thermal conductivity,"" B.t.u. per sq. ft. per ft. per hr. per °F., 68°P 69 



Density, lb. per cu. in 0. 306 



Forging range, °F 



Type structure Single phase, alpha 



« Refers to rod under 1 in. in diameter and cold-drawn 50 % with a ready-to-finisli grain size of 0.040 mm. 



'Refers to 1050°F. anneal (1 hr.). 



c Material cold-forged from soft rod (5—40%) reduction of area). 



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



" All tests conducted on 0.040-in. stock. 



/ 6 B. & S. Nos., hard, 0.070-0.015 mm. grain size at ready-to-finish, respectively. 



9 Refer to 1100°F. anneal (1 hr. at temperature). 



