112 



Copper and Copper-base Alloys 



70 



60 



110 

 100 



vo 



80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 



CD 400 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp. in [)eq.E[\Hr.o\ Temp.) 



Chakt 68. — The effect of annealing on the Rockwell hardness, per- 

 centage elongation in 2 in., percentage reduction of area of riveting- 

 and-turning rod, previously cold-drawn 40 per cent (reduction of area) 

 from extruded material having a grain size of 0.040 mm. (61.98% 

 copper, 1.42 % lead, balance zinc) (rod under 1 in. in diameter). 



50 



40 



o 30 



20 



CD 400 500 600 700 800 900 1000 1100 1200 1300 1400 

 Tempera+ure in Deg.I; ( I Hr. at Temp.) 



Chart 69. — The effect of annealing on the yield strength of riveting- 

 and-turning rod, previously cold-drawn 40 per cent (reduction of area) 

 from extruded material having a grain size of 0.040 mm. (61.98 % 

 copper, 1.42 % lead, balance zinc) (rod under 1 in. in diameter). 



TABLE 8 

 LEADED BRASS 



General Data — Strip 

 Copper, 60.96%; lead, 1.53 7o; iron, 0.04%; zinc, balance 



Property 



Hard" 



Soft" 



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 



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



Rockwell hardness B, J-f 6-in. ball, 100-kg. load. 



Rockwell hardness G, J-fe-in- bS'ilj 150-kg. load 



Rockwell superficial 15-T, J^g-iii- ball, 15-kg. load 



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



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



Melting point, °F 



Density, lb. per cu. in 



Coefficient of expansion' 



Electrical conductivity,*"' % I.A.C.S. at 68°F 



Thermal conductivity,'"' B.t.u. per sq. ft. per ft. per hr. per °F., 68°P 

 Specific gravity 



<■ 6 B. & S. No3., hard, 0.035-0.015 mm. grain size at ready-to-finish (0.040-in. stock), 

 ' Refers to a 1100°F. anneal (1 hr. at temperature). 

 « Average linear coefficient per "C, 25-300''C. 



88-96 

 56-63 

 65-65 

 79-82 

 72.5-73 



6-5 



108.5-109.5 



88.5-90 



61-66 



90-91 



77 



50-51 



13.5-16.5 



17.5-18 



17.5-18 



17.5-18 



52-45.5 



71-72 



27-29 



68-72 

 32-36 



15,000,000 

 1645 

 0.306 

 0.0000208 

 28.6 

 73 

 8.49 



