Metal density

TheVolumic mass is a physical quantity that characterizes the mass of a material per unit volume.

 

Density can be related to density. A density equal to 8.00 corresponds to a density of 8.00 g/cm3

 

The density of water is very close to 1 kg/ℓ. This is no coincidence, because it results from the first attempts to define the kilogram as the mass of one liter of water at 4°C (temperature for which the density of water is maximum); the exact value of the density of water at 4°C is 0.999973 kg/L.

 

3

3

3

.

The numerical value is the same in several units because 1 g/cm = 1 kg/dm

= 1 kg/L = 1 t/m



Thedensity of metalsis highly variable: about 1.8 for magnesium alloys and 11.35 for lead.

Density of common metals and alloys :

  • density of stainless steel type 304 (A2): 8.02

  • density of bronze: 8.8

  • density of copper: 8.92

  • lead density: 11.35

  • density of zinc: 7.15

  • density of titanium: 5

  • nickel density: 8.9

  • cupronickel density (30%): 8.95

  • density of brass: 8.3

  • density of aluminum alloys: 2.74

  • density of iron/steel: 7.8

Actual mass comparison of 4 HU M12 nuts from stock Screw-express

4315001212 → aluminum → density = 2.74 → mass of the 10 nuts = 51g

4385001202 → steel → density = 7.8 → mass of the 10 nuts = 148g

5725001209 → brass → density = 8.3 → mass of the 10 nuts = 173g

8425001218 → stainless steel → density = 8.02 → mass of the 10 nuts = 152g



Steel density / aluminum density ratio = 7.8 / .274 = 2.84

 

Mass ratio of 10 steel nuts / mass of 10 aluminum nuts = 148 / 51 = 2.9

 

Conclusion, the mass of steel is about 3 times greater than that of aluminum.



Steel density / stainless steel density ratio = 7.8 / 8.02 =0.97

 

Mass ratio of 10 steel nuts / mass of 10 stainless steel nuts = 148 / 152 = 0.97

 

Conclusion, the mass of steel is almost identical to the mass of stainless steel.



Steel / brass ratio = 7.8 / 8.3 = 0.94

 

Mass ratio of 10 steel nuts / mass of 10 brass nuts = 148 / 173 = 0.85 (the brass nut has a 0.3mm higher flat dimension which increases its weight).

 

Conclusion, the mass of steel is almost identical to the mass of brass.



Matter

Price (euros / kg)

density

Steel

1

7.8

stainless steel

4

8.02

Brass

8.3

Go

4

2.74

For the same quantity of parts manufactured is :

Steel is 4 times cheaper than stainless steel (4 euros x 8.02 / 1 euros x 7.8 = 4.20).

 

Aluminum is 1.4 times more expensive than steel (4 euros x 2.74 / 1 euros x 7.8 = 1.40).

Stainless steel is 3 times more expensive than aluminum (4 euros x 8.02 / 4 euros x 2.74 = 2.93).