The Leaded Brasses 



125 



TABLE 13 

 BRASS ROD FOR EXTRUDED SHAPES" 



Copper, 59.31%; lead, 2.02%; 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 emitted) 



Elongation, % in 2 in 



Reduction of area, % 



Rockwell hardness F, }{^-ia. ball, 60-kg. load ., 



Rockwell hardness B, J^g-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 



Forging range, °F 



Forging quality 



Type structure 



Forgings 



Hot Cold" 



58-60 

 14-25 

 19-24 

 18-23 

 17-22 

 45-40 

 46-53 

 74-84 

 35-49 

 71-82 

 15,000,000 



1640 



0.0000208 



28.6 



73 



1250-1450 



Excellent 



Two phase, alpha-beta 



•» This alloy combines excellent hot-working properties with good machining properties. 



* Refers to rod cold-worked 15% from extruded condition; rod under 1 in. in diameter with j 



"Extruded condition (850°F. 1 hr.). 



<* Material cold-struck from hot-forged condition. 



eady-to-finish grain size of 0.010 i 



Ex-Vn 



30 



5 10 15 20 25 



Percent Reduction by Cold Working 



Chart 108. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of extruded-shapes rod, previously extruded to a 

 grain size of 0.010 mm. (59.31 % copper, 2.02 % lead, balance zinc) 

 (rod under 1 in. in diameter). 



tio 



100 

 90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 



Extr. 5 10 15 20 25 30 



Percent Reduction by Cold Working 



Chart 109. — The effect of cold drawing on the Rockwell hardness, 

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

 extruded-shapes rod, previously extruded to a grain size of 0.010 mm. 

 (59.31 % copper, 2.02 % lead, balance zinc) (rod under 1 in. in diam- 

 eter). 



