The Tin Brasses 



149 



TABLE 6 

 ROMAN OR TOBIN BRONZE 



Copper, 60.00%; tin, 0.74%; iron, 0.04%; lead, trace; zinc, balance 



Property 



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) 



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



Yield strength, 0.2% offset, p.s.i. (000 omitted) 



Elongation, % in 2 in 



Reduction of area, % 



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



Rockwell hardness F, Me-^- ball, 60-kg. load 



Rockwell hardness B, }is-in. ball, 100-kg. load 



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



Modulus of elasticity, p.s.i 



Melting point, °F 



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



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 



Forging range, °F 



Forging quality 



Type structure 



Rod 



Forgings 



Available Creep Data'" 

 Previous history: hot-rolled to 0.750-in. rod; average grain size 0.025 mm. 



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

 6 Refers to 1200''F. anneal (for 1 hr.). 

 "Material cold-struck from hot-forged condition. 



