86 



TABLE 65 (continued). 



MECHANICAL PROPERTIES. 



TABLE 65. Copper Alloys Three (or more) Components. 



* Specification Values, Rolled Brass, Cu 62, Zn 37, Sn i, min. properties after U. S. Navy Spec., 1918. 



t Specification Values: Jan. 3, 1916, Vanadium Bronze Castings, Cu 61, Zn 38, Sn max. i (inch V). Mimima. 



I Compressive P-limit 15.5 kg/mm 2 or 22,000 Ib/in 2 



5 Compressive P-limit 10.5 kg/mm 2 or 15,000 Ib/in 2 and 28 per cent set for 70 kg/mm 2 or 100,000 Ib/in 2 



[I Ultimate compressive strength, 54.2 kg/mm 2 or 77,100 Ib/in 2 (Cu 76, Sn 7, Pb 13, Zn 4). 



If Compressive P-limit 8.8 to 9.1 kg/mm 2 or 12,500 to 13,000 Ib/in 2 , and 34 to 35 per cent set for 70 kg/mm 2 



** Compression: ultimate strength 49.5 kg/mm 2 or 70,500 Ib/in 2 



tt Modulus of Elasticity: (i) 12,200 kg/mm 2 or 17,300,000 Ib/in 2 ; (2) 10,500 kg/mm 2 or 14,000,000 Ib/in 2 



it Compressive P-limit 17.6 to 28.1 kg/mm 2 or 25,000 to 40,000 Ib/in 2 and 6 to 10 per cent set for 70 kg/mm* 

 or 100,000 Ib/in 2 load. 



Specification Values: U. S. Navy 46 B sc, Mar. i, 1917, Cu 85 to oo, Sn 6 to n, Zn max. 4: Cast, Grade i. Im- 

 purities max. 0.8; min. tensile strength 31.6 kg/mm 2 or 45,000 Ib/in 2 with 20 per cent elong. in 50.8 mm (2 in.). 



t Grade 2. Impurities max. 1.6; min. tensile strength 21.1 kg/mm 2 or 30,000 Ib/in 2 with 15 per cent elong. in 

 50.8 mm (2 in.). 



Specification Values: U. S. Navy 468 i^b, Mar. i, 1916, Cu min. 94. Sn min. 3.5, P 0.50, rolled or drawn. 



Fill Minimum yield points specified: for P-limits assur"" ^6 per cent o( V! Uu =hown. 



SMITHSONIAN TABLES. 



