Machine Drawing

446 Machine Drawing

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Table 8 Properties and uses of aluminium alloys and copper alloys

Material and approximate Tensile strength

composition (%) (Mpa)

Typical uses

Aluminium Al 55–140 Electrical cables, reflectors, cooking utensils,

(almost pure) radiators, piping, building components, paints, etc.

Aluminium-silicon alloy 280–140 Light castings, aircraft & marine applications,

(88) Al, (12)Si, radiators, crank cases, gear boxes, etc.

traces of Fe and Mn

Duralumin 450–550 General purposes, stressed aircraft components,

(4)Cu, (0.8)Mg, structural components, etc.

(0.5)Si, (0.7)Mn

Copper Cu 220–350 Chemical industry, heating equipment, cooking

(almost pure) utensils, tubing, roofing, boilers, etc.

Cartridge brass 325-650 Cartridge, shells, jewellery, etc.

(70)Cu, (30)Zn

Yellow brass or Muntz metal Hard Structural plates, tubing, valve rods, hot

(60)Cu, (40)Zn forgoings, etc.

Commercial brass 280–510 Imitation jewellery, lipstick cases, clamps, etc.

(90)Cu, (10)Zn

Tin bronze 220–310 Bearings, bushes, gears, piston rings, pump

(89)Cu, (11)Zn bodies, etc.

Gun-metal (tin bronze) 270–340 bearings, steam valve bodies, marine castings,

(88) Cu, (10)Sn, (2)Zn structural parts, etc.

Aluminium bronze 370–770 High wear and strength applications, marine

(91–95)Cu, (5–9)al hardware, etc.

Phosphor bronze 220–420 Bearings, bushes, valves, general sand castings,

(86-90.7)Cu, (9-13)Sn, (0.3-1)P etc.

High-lead tin bronze 170–310 General purpose bearing and bushing alloy,

(76)Cu, (9)Sn, (15)Pb wedges, etc.

Monel metal 600–950 Chemical engineering, propeller shafts, high-

(30)Cu, (1.4)Fe, temperature valve seats, high strength

(1)Mn, (67.6)Ni components, etc.