The Tin Bronzes 



275 



^100 



^ 90 

 u 



^ 80 

 x> 



§ 70 



O 



~c 60 

 c 50 



Cv) 



5 40 



30 



20 



UJ Q 



CR 400 500 600 700 800 900 1000 1]00 (200 1300 

 Annealing Temp. in Deg.F(IHr: a\ Temp.) 



Chaht 26. — The effect of annealing on the tensile strength and 

 hardness of a phosphor bronze (3.09 % tin, 0.39 % phosphorus, balance 

 copper) previously cold-rolled 60 per cent (reduction of area) according 

 to Cook and Tallis.'^o) 



CR 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.R (I Hn at Temp.) 



Chart 27. — The effect of annealing on the Erichsen ductility value 

 and percentage elongation in 2 in. of a phosphor bronze (3.09 % tin, 

 0.39 % phosphorus, balance copper), previously cold-rolled 60 per cent 

 (reduction of area) according to Cook and Tallis.'"' 



TABLE 5 

 3 PER CENT PHOSPHOR BRONZE 



General Data" — Strip 

 Copper, 96.84%; tin, 3.11%; phosphorus, 0.02% 



Property 



Soft- 



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



0.10% proof strength, p.s.i. (000 omitted) 



Limit of proportionahty, p.s.i. (000 omitted) 



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



Elongation, % in 2iQ , 



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



Rockwell hardness E, M-in- ball, 100-kg. load 



Diamond pyramid, 10 kg 



Erichsen value, mm 



Brinell hardness, 10 kg., 1 mm 



Shore Scleroscope, M. H 



S. & S., Shore Scleroscope, U. H., and self-recorder 



Specific gravity 



Densitj', lb. per cu. in 



Coefficient of thermal expansion, X10~^: 



At 20-100°C 



At 20-200''C 



At 20-300°C 



At 20-400°C 



Thermal conductivity: 



At 70°F., B.t.u. per sq. ft. per ft. per hr. per °F 



At 400°F., B.t.u. per sq. ft. per ft. per hr. per °F 



Temperature coefficient of thermal conductivity 



Specific resistance, ohm-cm. X 10~* at 20°C 



Modulus of elasticity, lb. per sq. in 



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



- Based on data by Cook and Tallis™. 



» Refers to strip cold-rolled 50 % (ready-to-finish anneal 2 hr. at 1150°F.) 



« Refers to 1150°F. anneal 2 hr. at temperature. 



77 

 70 

 45 



9 



84 

 109 

 175 



153 



53 



31 



?.927 



66 

 12.5 



8.929 



16.9 



17.5 

 18,1 

 18.5 



67.76 

 84.40 

 0.0014 

 6.37 

 14,500,000 

 27.0 



