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Handbook Properties and Selection Nonferrous Alloys and Spl Purpose Mtls (1992) WW Part 3

Tham khảo tài liệu 'handbook properties and selection nonferrous alloys and spl purpose mtls (1992) ww part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Alloy Temper and product form a Specific gravity b Density b Approximate melting range Electrical conductivity IACS Thermal conductivity at 25 C 77 F cal cm-s- C Coefficient of thermal expansion per C X 10-6 per F X 10-6 kg m3 lb in.3 C F 20-100 C 68-212 F 20-300 C 68-570 F 710.0 F S 2.81 2823 0.102 600- 650 1110- 1200 35 0.33 24.1 13.4 26.3 14.6 711.0 F P 2.84 2851 0.103 600- 645 1110- 1190 40 0.38 23.6 13.1 25.6 14.2 712.0 F S 2.82 2823 0.102 600- 640 1110- 1180 40 0.38 23.6 13.1 25.6 14.2 Bearing alloys aluminum-tin 713.0 F S 2.84 2879 0.104 595- 630 1110- 1170 37 0.37 23.9 13.3 25.9 14.4 850.0 T5 S 2.87 2851 0.103 225- 650 440- 1200 47 0.44 . . 851.0 T5 S 2.83 2823 0.102 230- 630 450- 1170 43 0.40 22.7 12.6 . 852.0 T5 S 2.88 2879 0.104 210- 635 410- 1180 45 0.42 23.2 12.9 . a S sand cast P permanent mold D die cast. b The specific gravity and weight data in this table assume solid void-free metal. Because some porosity cannot be avoided in commercial castings their specific gravity or weight is slightly less than the theoretical value. Table 3 Ratings of castability corrosion resistance machinability and weldability for aluminum casting alloys 1 best 5 worst. Individual alloys may have different ratings for other casting processes. Alloy Resistance to hot cracking a Pressure tightness Fluidity b Shrinkage tendency c Corrosion resistance d Machinability e Weldability f Sand casting alloys 201.0 4 3 3 4 4 1 2 208.0 2 2 2 2 4 3 3 213.0 3 3 2 3 4 2 2 222.0 4 4 3 4 4 1 3 240.0 4 4 3 4 4 3 4 242.0 4 3 4 4 4 2 3 A242.0 4 4 3 4 4 2 3 295.0 4 4 4 3 3 2 2 319.0 2 2 2 2 3 3 2 354.0 1 1 1 1 3 3 2 355.0 1 1 1 1 3 3 2 A356.0 1 1 1 1 2 3 2 357.0 1 1 1 1 2 3 2 359.0 1 1 1 1 2 3 1 A390.0 3 3 3 3 2 4 2 A443.0 1 1 1 1 2 4 4 444.0 1 1 1 1 2 4 1 Alloy Resistance to hot cracking a Pressure tightness Fluidity b Shrinkage tendency c Corrosion resistance d Machinability e Weldability f 511.0 4 5 4 5 1 1 4 512.0 3 4 4 4 1 2 4 514.0 4 5 4 5 1 1 4 520.0 2 5 4 5 1 1 5 535.0 4 5 4 5 1 1 3 .