Handbook of Materials for Product Design Part 3

Tham khảo tài liệu 'handbook of materials for product design part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | TABLE Typical Physical Properties of Wrought Alloys1 Continued Alloy Average2 coefficient of thermal expansion 68 to 212 F per F. Melting range 3 4 approx. F Temper Thermal conductivity at 77 F English units5 Electrical conductivity at 68 F percent of International Annealed Copper Standard Electrical resistivity at 68 F Ohm-cir. Mil foot Equal volume Equal weight 7175 890-11758 T74 1080 39 124 26 7178 890-11658 T6 870 31 98 33 7475 890-1175 T61 T651 960 35 116 30 T76 T651 1020 40 132 26 T7351 1130 42 139 25 8017 1190-1215 H12 H22 . . 59 193 18 H212 . . 61 200 17 8030 1190-1215 H221 1600 61 201 17 8176 1190-1215 H24 1600 61 201 17 1The following typical properties are not guaranteed since in most cases they are averages for various sizes product forms and methods of manufacture and may not be exactly representative of any particular product or size. These data are intended only as a basis for comparing alloys and tempers and should not be specified as engineering requirements or used for design purposes. 2Coefficiet to be multiplied by 10-6. Example X 10-6 . 3Melting ranges shown apply to wrought products of 1 4 inch thickness or greater. 4Based on typical composition of the indicated alloys. 5English units but-in. ft2hr F 6Eutectic melting can be completely eliminated by homogenization. 7Eutectic melting is not eliminated by homogenization. 8Homogenization may raise eutectic melting temperature 20-40 F but usually does not eliminate eutectic melting. 9Although not formerly registered the literature and some specifications have used T736 as the designation for this temper. ro 8 Aluminum and Its Alloys Poisson s ratio v Fracture toughness B645 B646 Elongation B557 Hardness B647 B648 B724 E10 E18 Fatigue strength Mechanical properties are a function of the alloy and temper as well as in some cases product form. For example 6061-T6 extrusions have a minimum tensile ultimate strength of 38 ksi 260 MPa while 6061-T6 .