254 



Copper and Copper-base Alloys 



TABLE 1 



5 PER CENT ALUMINUM BRONZE 



General. Data — Rod 



Copper, 95.19%; aluminum, 4.66% 



Property 



Rod 



Hard" Soft* 



Forgings 



Hot Cold" 



Cold'* 



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) 



0.2% ofiset, p.s.i. (000 omitted) 



0.1% offset, p.s.i. (000 omitted) 



Elongation, % in 2 in 



Reduction of area, % 



Rockwell hardness F, Vie-in- ball, 60-k;g. load. 

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



Brinell hardness, 10-mm. ball, 500-kg. load 



Modulus of elasticity, p.s.i 



Forging range, °F 



Forging quality 



Type structure 



110 



75 



65 

 90 

 78 

 60 

 55 



110 

 92 



163 



55-65 

 10-20 



60-90 

 30-58 



30-15 



30-15 



30-15 



55-65 



70-78 



65-88 



55-30 



89-67 



17,500,000 



1350-1550 



Good 



Single phase, alpha 



32-60 

 32-68 

 25-55 

 50-15 

 72-62 

 93-107 

 70-85 

 110-142 



95 

 62 



62 

 75 

 62 

 15 

 60 

 108 



General Data — Tubing 

 Copper, 94.62%; aluminum, 4.69%; lead, trace: tin, nil 



Property 



Hard" 



Soft/ 



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



Elongation, % in 2 in 



Apparent elastic hmit, p.s.i. (000 omitted) 



Rockwell hardness F, J-ie-in. ball, 60-kg. load. . 

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

 Rockwell hardness G, Ke-in- ball, 150-kg. load. 

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



Physical Data 



Melting point, °F ,. ■ ■ • 1945 



Coefficient of expansion, per °C. from 25-300°C 0.0000180 



Electrical conductivity, % I.A.C.S 17 .7 



Thermal conductivity, B.t.u. per sq. ft. per ft. per hr. per °F., 68°F 47.9 



Density, lb. per cu. in .295 



o Refers to rod cold-drawn 50 % ; rod under 1 in. in diameter, ready-to-finish grain size 025 mm. 



i> Refers to 1200°F. anneal (1 hr.). 



■: Material cold-forged from soft rod (5-30% reduction of area). 



<* Material cold-forged from cold-worked condition (30 %) . 



• Extruded, reduced, and cold-drawn to ^ in. O.D. X 0.049 In. wall thickness. 



/ 1300°F. anneal (1 hr. at temperature) of material described in footnote e. 



