The Leaded Brasses 



129 



70 



60 



50 



c 

 1^40 



30 



20 



CD 400 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp. in Dcq. F f 1 Hr. a4 Temp.) 



Chart 119. — The effect of annealing on the yield strength of archi- 

 tectural-bronze rod, previously cold-drawn 18 per cent (reduction of 

 area) from extruded material having a grain size of 0.025 mm. (56.64 % 

 copper, 1.91 % lead, balance zinc) (rod under 1 in. in diameter). 



30 31 32 33 34 35 



Shear Streng+h, 1 00 Lb. per Sq. In. 



Chart 120. — Conversion chart for determination of shear strength 

 of architectural bronze (56.50 % copper, 2.20 % lead, balance zinc) 

 when tensile strength is known. Accurate to +5 %'"' 



TABLE 16 

 RED BRASS 



Copper, 55.02%; lead, 1.62%; zinc, balance; iron, 0.05% 



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



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



Elongation, %in2in 



Reduction of area, % 



Rockwell hardness F, J^g-iii- ball, 60-kg. load 



Rockwell hardness B, }{^-ui. ball, 100-kg. load 



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



Modulus of elasticity, p.s.i 



Melting point, °F 



Density, lb. per cu. in : 



Forging range, °F 



Forging quality 



Type structure 



<» Refers to rod cold-drawn 17% from the extruded condition; rod under 1 in. in diameter, 

 * Extruded condition. 



Rod 



Forgings 



