The Tin Brasses 



165 



O 

 o 



-100 



CD 



■^ 90 



80 



'^ 70 



n 60 



w 40 

 J; 30 



== 20 



?. 10' 



CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.R( lHr:a+ Temp.) 



Chaet 97. — The effect of annealing on the Rockwell hardness, per- 

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

 leaded naval-brass rod, previously cold-drawn 30 per cent (reduction 

 of area) from material having a grain size of 0.025 mm. (60.95 % copper, 

 1.03% tin, 0.72% lead, balance zinc) (rod under 1 in. in diameter). 



CD 400 500 600 700 800 900 1000 1 100 1200 1300 

 Annealiny Temp, in Deg. R ( 1 Hr a+ Temp.) 



Chart 98. — The effect of annealing on the yield strength of medium- 

 leaded naval-brass rod, previously cold-drawn 30 per cent (reduction of 

 area) from material having a grain size of 0.025 mm. (60.95 % copper, 

 1.03 % tin, 0.72 % lead, balance zinc) (rod under 1 in. in diameter). 



TABLE 10 



HIGH-LEADED NAVAL BRASS 



Copper, 59.66%; tin, 1.02%; lead, 2.06%; iron, 0.05%; zinc, balance 



Property 



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



Apparent elastic Umit, 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, Ke-in. ball, 60-kg. load 



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



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



Modulus of elasticity, p.s.i 



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



Melting point, °F 



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 



Type structure 



<■ Refers to rod cold-drawn 30 % ; rod under 1 in. in diameter, ready-to-finish grain size, 0.025 

 6 Refers to anneal at 1000°F. for 1 hr. 



Rod 



