278 



Copper and Copper-base Alloys 



0*100 

 to 



o 80 

 o 



7 70 

 _c 



CM 60 

 c 



^ 50 



c 



If 40 

 o. 



e 30 



o 



"a 20 



cr> 



c 

 ^ 10 



LU 







CR 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp. in Deq.F.(2Hr.a\ Temp.) 

 Chaht 34. — The effect of annealing on the tensile strength and 

 percentage elongation in 2 in. of a phosphor bronze (3.71 tin, 0.12 % 

 phosphorus, balance copper), previously cold-rolled 60 per cent (reduc- 

 tion of area) according to Cook and TaUis.*'"' 



200 



180 



160 



5 140 



5 120 



a. 110 

 o 80 



E 



.5 60 

 o 



40 

 20 



CR 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp. in Deg.Hr2Hr. a+ TempO 



Ch.vrt 35. — The effect of annealing on the Erichsen ductility value 

 and hardness of a phosphor bronze (3.71 % tin, 0.12 % phosphorus, 

 balance copper), previously cold-roUed 60 per cent (reduction of area) 

 according to Cook and TaUis.*^"' 



TABLE 7 

 5 PER CENT PHOSPHOR BRONZE 



General Data" — Strip 

 Copper, 94.60%; tin, 5.27 7t,; phosphorus, 0.09% 



Propertj' 



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



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



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



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



Elongation, % in 2 in 



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



Rockwell hardness E, J-^-in. ball, 100-kg. load 



Diamond pyramid, 10-kg. load 



Erichsen value, mm 



Brinell hardness, 10 kg., 1-mm. ball 



Shore Scleroscope, INI. H 



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



Specific gravity 



Density, 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 conductivitj' 



Specific resistance, ohm-cm. X 10"'^ at 20°C 



Modulus of elasticity, p.s.i 



Electrical conductivity, % I.A.C.S., 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. 



Hard!- 



96 

 113 

 198 



178 



59 



40 



5.923 



Soft' 



37.8 

 60 



75 

 14.2 



8.919 



0.322 



17.0 

 17.5 

 18.0 

 18.4 



43.56 

 68.08 

 0.0018 

 10.25 

 14,500,000 

 16.8 



