Material

r

lb/ft³

kN/m3

Aluminum alloys

-

-

    7075-T6

175

28

     6061-T6

170

26

Brass

530

83.5

Bronze

530

83

Cast iron

447.5

70

Concrete

     Plain

145

23

     Reinforced

150

24

     Lightweight

92.5

16.5

Copper

556

87

glass

165

26

Magnesium alloys

112

17.5

Monel (67% Ni, 30% Cu)

550

87

Nickel

550

87

Plastics

     Nylon

62.5

9.8

     Polyethylene

75

11.7

Rock

     Granite, marble, quartz

172.5

27

     Limestone, sandstone

152.5

24

Rubber

70

11

Sand, soil, gravel

105

16.5

Steel

490

77

Titanium

280

44

Tungsten

1,200

190

Water, fresh

62.4

9.81

     sea

63.8

10

Wood (air dry)

     Douglas fir

32.5

5.1

     Oak

42.5

6.7

     Southern pine

37.5

5.9

Material

a

10^{-6/ o}F

10^{-6/ o}C

Aluminum alloys

13

23

Brass

11.2

20.15

Bronze

10.75

19.5

Cast iron

11.6

10.95

Concrete

6

10.5

Copper & copper alloys

9.5

17.1

Glass

4.5

8

Magnesium alloys

15.25

27.45

Monel (67% Ni, 30% Cu)

7.7

14

Nickel

7.2

13