188 



Copper and Copper-base Alloys 



100 



90 



80 

 £ 70 

 ^ 60 



S. 50 

 xi 



o 40 



o 



S 30 



20 



10 







Room 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.F. ( IHr. a+Temp.) 



Chart 34. — The effect of annealing on the tensile strength, apparent 

 elastic limit, and grain size of arsenical-brass rod, previously cold- 

 drawn 23 per cent (reduction of area) from material having a grain 

 size of 0.020 mm. (56.28 % copper, 1.S7 % nickel, 1.34 % iron, 0.98 % 

 lead, 0.65 % arsenic, balance zinc) (rod under 1 in. in diameter). 



I?oom400 500 600 700 800 900 1000 ItOO 1200 1300 

 Annealing Temp, in Deg.F ( IHr.a+ Temp.) 



CH,iRT 36. — The effect of annealing on the RockwcU hardness, 

 percentage elongation in 2 in., and percentage reduction of area of 

 arsenical-brass rod, previously cold-drawn 23 per cent (reduction of 

 area) from material having a grain size of 0.020 mm. (56.28 % copper, 

 1.97 % nickel, 1.34 % iron, 0.98 % lead, 0.65 % arsenic, balance zinc) 

 (rod under 1 in. in diameter). 



100 200 300 400 500 600 700 800 900 1000 1100 1200 

 Temperature in Deg.F. ( 1 Hr a+ Temp.) 



Chart 35. — The effect of elevated temperature on the tensile 

 strength, percentage elongation in 2 in., and percentage reduction of 

 area of arsenical-brass rod (56.28 % copper, 1.87 % nickel, 1.34 % iron, 

 0.98 % lead, 0.65 % arsenic, balance zinc), previously cold-drawn 27 per 

 cent (reduction of area) from a grain size of 0.025 mm. followed by 

 relief annealing at 570°F. for 45 min. (rod under 1 in. in diameter). 



CD 400 500 600 700 800 900 1000 1100 1200 13001400 

 Annealing Temp, in Deg.F (IHr. at Temp.) 



Ch^vrt 37. — The effect of annealing on the yield strength of arsenical- 

 brass rod, previously cold-drawn 23 per cent (reduction of area) from 

 material having a grain size of 0.020 mm. (56.28 % copper, 1.97 % 

 nickel, 1.34 % iron, 0.98 % lead, 0.65 % arsenic, balance zinc) (rod 

 under 1 in. in diameter). 



