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Carbon steel, an alloy of iron and carbon, is a popular choice for many industries due to its strength, durability, and affordability.  The amount of carbon in the steel determines its hardness and strength – more carbon makes it harder but less workable.  This product can be used in various industrial applications like “Construction”, “Automobile” , “Mechanical” & “Tools & Technology”.

While carbon steel is easy to weld and shape, carbon steel can rust if not protected.  One of the key factors to consider when using carbon steel is its density, which affects its weight and how it behaves in different applications.  Let’s understand more deeper into the density of carbon steel and its impact on its properties in this blog post.

What Is the Density of Carbon Steel In kg m3, lb in3?

Density is a crucial factor in industrial applications, representing mass per unit volume. Carbon steel has a density of 7850 kg/m³ or 7850 g/cm³ (0.284 lb/in³), lower than stainless steel. This density varies with alloying elements, typically ranging from 7.75 g/cm³ (7.85 lb/in³) to 8.05 g/cm³ (0.291 lb/in³). High-carbon steel is denser than low-carbon steel. Carbon steel is heavier than aluminum but lighter than stainless steel and copper alloys. The main difference between carbon and mild steel lies in their carbon properties: carbon steel has more (0.05 to 2.1%), making it robust but less ductile, while mild steel has less carbon (0.05 to 0.25%). Medium carbon steel contains 0.30 to 0.60% carbon.

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How Density Impacts Carbon Steel Properties?

The density of carbon steel impacts various properties such as strength, malleability, ductility, electrical conductivity, heat capacity, and thermal expansion rate. Higher-density materials generally have higher strength-to-weight ratios and are more resistant to deformation, requiring more energy to deform under compressive forces. They also exhibit lower electrical conductivity due to increased resistivity and have higher heat capacities, absorbing more heat energy before temperature changes. Additionally, higher-density materials tend to have higher thermal expansion rates, expanding more when exposed to temperature or pressure increases.

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Formula to Measure the Density of Carbon Steel lb/in3?

Steel density in lb/in³ is not typically calculated directly but can be determined by multiplying the density in g/cm³ by a conversion factor of 0.036127. The formula is: Density in lb/in³ = (Mass/Volume) x 0.036127. The density of steel is approximately 0.284 lb/in³ or 7.8 g/cm³.

Covert Carbon Steel Density of g cm3 in kg m3

Standard units for mass and volume are kilogram and cubic meter (m³). However, if laboratory measurements are in grams and cubic centimeters (cm³), users can convert to carbon steel density in kilograms per cubic meter (kg/m³) by multiplying by 1000. 1 kg/m³ = 0.000001 g/cm³.

Convert Density of Carbon Steel lbs/in3 to kg/m3

In the US, density is often measured in Imperial units (lb/pounds). Users can convert pounds per cubic inch (lb/in³) directly to kilograms per cubic meter (kg/m³) using the conversion factor:

1 lb/in³ = 27679.9 kg/m³

Density Low Carbon Steel Measurement

The density of low carbon steel can vary slightly based on the grade and composition, usually ranging from 7.75 g/cm³ to 8.05 g/cm³ (7.85 lb/in³ to 0.291 lb/in³).

Carbon Steel GradeDensity in kg/m3Density in g/m3Density in lb/in3
AISI 100578507.85490
AISI 100678507.85490
AISI 100878507.85490
AISI 101078507.85490
AISI 101178507.85490
AISI 101278507.85490
AISI 101378507.85490
AISI 101578507.85490
AISI 101678507.85490
AISI 101778507.85490

Density of High Carbon Steel

The density of high carbon steel can vary based on the grade and composition, typically ranging from 7.75 to 8.05 g/cm³ (0.282 to 0.291 lb/in³). This is slightly higher than the density of pure iron, which is around 7.85 g/cm³.

Carbon Steel GradeDensity in kg/m3Density in g/m3Density in lb/in3
AISI 105578107.81488
AISI 106078107.81488
AISI 106478107.81488
AISI 106978107.81488
AISI 107078107.81488
AISI 107878107.81488
AISI 108578107.81488
AISI 109578107.81488
AISI 114178107.81488
AISI 115178107.81488

Density of Medium Carbon Steel

The density of medium carbon steel varies depending on its specific grade and composition but typically falls within the range of 7.75 to 8.05 g/cm³ (0.282 to 0.291 lb/in³).

Carbon Steel GradeDensity in kg/m3Density in g/m3Density in lb/in3
AISI 100578307.83489
AISI 101078307.83489
AISI 101378307.83489
AISI 101878307.83489
AISI 101978307.83489
AISI 102178307.83489
AISI 102378307.83489
AISI 102678307.83489
AISI 111078307.83489
AISI 111878307.83489


In summary, the density of carbon steel has a significant impact on its properties like strength-to-weight ratio, flexibility, electrical conductivity, heat capacity, and thermal expansion rate. Engineers and designers in various fields, such as automotive and construction, use this understanding to choose the right carbon steel grade for their specific needs, considering both cost and performance requirements. With this knowledge, they can make informed decisions that balance the material’s properties with project goals, ensuring optimal performance in diverse applications.

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