The Brasses 



79 



TABLE 10 



MUNTZ METAL 



General Data — Rod 



Copper, 60.73%; lead, 0.07%; iron, 0.02%,, zinc, balance 



Property 



Hard" Soft'' 



Forgings 



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) 



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, % 



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



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



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



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



Modulus of elasticity, p.s.i 



Forging range 



Forging quahty 



Type structure 



General Data — Strip'' 



80 

 50 

 57 

 66 

 57 

 20 

 58 

 25 

 104 



52 

 17 

 22 

 22 

 22 

 48 

 70 

 21 

 84 

 49 

 82 



56-60 

 12-19 

 17-22 

 16-22 

 15-20 

 55-45 

 70-60 



56-62 

 25-30 

 30-35 

 25-35 

 25-35 

 45-40 

 65-60 



75-78 90-95 



33^5 57-67 



151 82 69-79 91-106 



15,000,000 



1250-1450 



Excellent 



Two-phase structure, alpha-beta 



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, % in 2 in 



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



Rockwell hardness B, Ke-iii- ball, 100-kg. load 



Rockwell hardness G, J^g-in- ball, 150-kg. load 



Rockwell hardness 15-T, Ke-iii- ball, 15-kg. load 



Rockwell hardness 30-T, Ke-in. ball, 30-kg. load 



Endurance limit, p.s.i 



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



General Data — Tube 

 Copper, 60.80%; lead, 0.01%; iron, trace; zinc, balance 



Hard' 



Soft/ 



Property 



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



Elongation, % in 2 in 



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

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

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



Soft* 



Physical Data 



Melting point, °F 1660 



Coefficient of expansion, per °C. from 25-300°C 0.0000208 



Electrical conductivity,'"' % I.A.C.S., 68°F 28.8 



Thermal conductivity,'*" B.t.u. per sq. ft. per ft. per hr. per °F., 68°F 73 



Density, lb. per cu. in 0. 303 



Available Creep Data'^> 

 Previous history: hot-rolled to 0.750-in.-diameter rod; grain size alpha constituent 0.020 mm. 



