The Silicon Bronzes 



245 



TABLE 3 

 TYPE B— SILICON BRONZE 



General Data — Rod 

 Silicon, 1.91%; copper, balance; manganese, 0.51% 



Property 



Rod 



Hard" Soft' 



Forgings 



Hot Cold' CoW 



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



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



Elongation, % in 2 in 



Reduction of area, % 



Endurance limit, p.s.i. (000 omitted) 



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

 Rockwell hardness B, Jle-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 



Density, lb. per cu. in 



Melting point, °F 



100 

 55 



60 



75 

 65 

 70 

 70 

 25 

 108 



42 



7 



14 

 13 



12 

 15 



85 

 15 



44 



42-50 

 7-20 



35-11 



25-8 



24-7 



70-50 



85-80 



15-18 



44-76 



45-55 

 20-30 



24-58 

 24-68 

 22-58 

 50-40 

 80-80 



85-100 



49-76 



82-122 



81 



15,000,000 



1250-1450 



Good 



Single phase, alpha 



0.316 



1900 



92 

 60 



59 

 72 

 63 

 15 

 68 



108 

 90 



157 



General Data — Strip 



Property 



Hard' 



Soft/ 



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



Elongation, % in 2 in.' 



Apparent elastic limit, p.s.i. (000 omitted)". . . . 

 Rockwell hardness F, Jfe-™. ball, 60-kg. load" 

 Young's modulus of elasticity, lb. per sq. in. . . 



Melting point, °F 



Density, lb. per cu. in 



97 



15,000,000 

 1900 

 0.316 



General Data — Tube 

 Copper, 97.46%; zinc, 0.49%; tin, 0.25%,; silicon, 1.91% 



Property 



Hard" 



Relief anneal 

 550°F., yi hr. 



Soft- 



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



Elongation, % in 2 in 



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

 Rockwell hardness, He-in. ball, 60-kg. load. 



108 



7 



95 



113 



Physical Data 



Melting point, °F 1 900 



Coefficient of expansion, per °C. from 25-300°C .0000179 



Electrical conductivity, % I.A.C.S 11 



Thermal conductivity, B.t.u. per sq. ft. per ft. per hr. per °F., 68°F 31 



Density, lb. per cu. in 0.316 



« Refers to rod cold-drawn 50%; rod under 1 in. in diameter, ready-to-finish grain size 0.080-0.100 mm. 



» Refers to 1400°F. anneal (for 1 hr.). 



■= Material cold-forged from soft rod (5-40% reduction of area). 



<* Material cold-forged from cold-worked condition (40 %). 



"6 B. & S. Nos., hard, cold-rolled, relief-annealed. 



/ 10 B. & S. Nos., hard, 1300°F. anneal (1 hr.). 



" Apply to strip only (all tests conducted on 0.040-in, stock). 



'' Apply to extruded, reduced, and cold-drawn to ^4. by 0.049 in. with no intermediate anneals. 



■■ Apply to h with 1300°F. anneal (1 hr.). 



