120 



Copper and Copper-base Alloys 



TABLE n 

 DEEP-DRILLING ROD« 



Copper, 62.11%; lead, 4.00%; iron, 0.05%; zinc, balance 



Property 



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, % 



Rockwell hardness F, J^e-in. ball, 60-kg. load 



Rockwell hardness B, Ke-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 



** This alloy has excellent machiuiiig jjiopertie; 

 ^ Refers to rod cold-drawn 30 % ; rod under 1 i 

 « Refers to 1200°r. anneal (1 hr.). 



, in diameter, ready-to-finish grain size, 0.050 i 



Ex+r. 10 20 30 40 



Percent Reduction by Cold Working 



Chakt 94. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of deep-drilling rod, previously extruded to a 

 grain size of 0.050 mm. (62.11 % copper, 4.00 % lead, balance zinc) 

 (rod under 1 in. in diameter). 



Ex+r. 



10 20 30 40 



Percent Reduction by Cold Working 



Chart 95. — The effect of cold drawing on the Rockwell hardness, 

 percentage elongation in 2 in., and percentage reduction of area of 

 deep-drilling rod, previously extruded to a grain size of 0.050 mm. 

 (62.11 % copper, 4.00 % lead, balance zinc) (rod under 1 in. in diam- 

 eter). 



