PHYSICAL PROPERTIES OF IRON AT ROOM TEMPERATURE

Gray iron

Ductile iron

Low carbon steel castinhg

Low Alloy steel casting

Density (lbs/in³)

0.26

0.26

0.28

0.28

0.28

0.28

0.3

0.3

Modulus of elasticity(Tension) (Psi) [E]

13000000

26000000

30000000

30000000

Modulus of rigidity (Shearing) (Psi) [G]

5800000

9800000

11500000

11500000

Thermal conductivity (BTU/Hr/ft²/inch/°F) [k](Cu=2700

325

250

350

225

Thermal expansion coefficient(/°F) [a]

5.8 X 10-6

6.5 X 10-6

6.5 X 10-6

6.7 X 10-6

Damping capacity

40 to 125

3 to 10

1 to 2

1 to 2

Electrical resistivity(µ Ohm . Cm) [ρ] (Cu =1.67)

80 to 100

40 to 60

12

15

Magnetic properties (KiloGauss/Oersteds@100 Oersteds

10

14

16

16

Pattern-making shrinkage (%)

0.83

1.04

1.56

2.08