The Brasses 



41 



TABLE 3 

 RICH LOW BRASS (RED BRASS) 



General Data — Rod 

 Copper, 85.68%; lead, trace; iron, trace; zinc, balance 



Property 



Rod 



Hard'' Soft' 



Forgings 



Hot 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) 



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



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



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



Modulus of elasticity, p.s.i 



Hot-forging range, °F 



Hot-forging quality 



Type structure 



75 

 60 

 64 

 72 

 67 

 55 

 80 

 20 



100 

 78 



126 



37 



8 

 14 

 14 

 12 

 18 

 72 

 14 

 59 



37-42 

 8-12 

 14-18 

 14-16 

 12-15 

 60-50 

 85-80 



64 



42-68 

 18-50 

 25-57 

 22-54 

 24-62 

 47-20 

 80-74 

 14-18 

 70-98 



75 

 63-120 



48-68 

 18 

 60 



15,000,000 



1350-1500 



Pair 



Single phase, alpha 



72 

 56 

 67 

 68 

 62 

 18 

 72 

 20 



100 

 78 



126 



General Data — Strip 

 Copper, 85.42%; lead, nil; iron, trace; zinc, balance 



Property 



Soft/ 



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, J-f g-ii- ball, 60-kg. load" 



Rockwell hardness B, Kg-in- ball, 100-kg. load". . . . 

 Rockwell hardness G, Ke-ii- ball, 150-kg. load". . . . 

 Rockwell hardness 15-T, Ke-io- ball, 15-kg. load". . . 

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

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



General Data — Tube 

 Copper, 86.01%; lead, trace; iron, trace; zinc, balance 



Property 



Soft* 



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



Elongation, % in 2 in 



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

 Rockwell hardness F, J^g-iii- ball, 60-kg. load. 



45 

 43 

 15 

 60 



Physical Data 



Melting point, °F 1870 



Coefficient of expansion, per "C. from 26-300°C 0. 0000187 



Electrical conductivity,"') % I.A.C.S., 68°F , 34.7 



Thermal conductivity,**" B.t.u. per sq. ft. per ft. per hr. per °F., 68°F 87 



Density, lb. per cu. in : . . . 0.316 



Available Creep Data'" 

 Previous history: hot-rolled to 0.750 in. in diameter; grain size 0.030 mm. 



See p. 40 for table footnotes. 



