Density of steel, stainless, aluminium, copper, brass and more — in g/cm³ and kg/m³.
Material
g/cm³
kg/m³
Lead
11.34
11,340
Copper
8.96
8,960
Bronze
8.80
8,800
Brass
8.50
8,500
Stainless 316
8.00
8,000
Stainless 304
7.90
7,900
Steel (S235/S355)
7.85
7,850
Cast iron
7.20
7,200
Zinc
7.14
7,140
Titanium
4.51
4,510
Aluminium
2.70
2,700
Nominal densities; actual values vary slightly by alloy and treatment. 1 g/cm³ = 1000 kg/m³.
What is density used for?
The density (mass per volume) determines a part's weight: weight = volume × density. Steel is around 7.85 g/cm³, aluminium 2.7 and copper 8.96. For plates, bars and profiles you can quickly work out the weight — handy for quotes, transport and design.
Frequently asked questions
What is the density of steel?
Structural steel about 7.85 g/cm³ (7850 kg/m³). Stainless 304 around 7.9 and 316 around 8.0 g/cm³.
How do I convert g/cm³ to kg/m³?
Multiply by 1000: 7.85 g/cm³ = 7850 kg/m³.
Why does actual weight differ?
Alloy, rolling tolerances and surface treatment give a few percent difference from the nominal density.
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