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Black Steel vs Mild Steel – What’s the Difference

Black Steel vs Mild Steel

When it comes to steel, there are two main types—black steel and mild steel. Both materials offer a variety of advantages and disadvantages depending on their intended use. For those unfamiliar with these metals, let’s take a closer look at the differences between black and mild steel.

What is Black Steel?

Black steel is created through heat-treating and rolling, making it highly durable and resistant to corrosion. It is also called “carbon steel” because it contains up to two per cent carbon by weight. This type of steel is commonly used to construct bridges, buildings, and other structures that require extreme strength and durability. Black steel is also famous for its low cost compared to metal alloys.

What is Mild Steel?

Mild steel is also known as low-carbon or plain-carbon steel because it contains very little carbon (less than 0.3%). Mild steel has good ductility, meaning it can be easily shaped into various products, including wires, rods, bars, sheets, etc., making it one of the most versatile materials available for industrial use. In addition to being malleable, mild steel is inexpensive compared to other metals such as stainless or aluminium alloys. Due to its low cost and ability to withstand high temperatures, mild steel is often used in automotive manufacturing processes such as engine blocks and exhaust systems.

Difference Between Black Steel vs Mild Steel


Black steel is made of iron that has not been galvanized. Mild steel is made of iron that has been galvanized with a thin layer of zinc.


Black steel is stronger than mild steel because it is not as brittle. The zinc coating on mild steel makes it more susceptible to breakage.

Corrosion Resistance

Mild steel is more resistant to corrosion than black steel. The zinc coating on mild steel protects it from rusting, while black steel will rust over time.


Black steel is cheaper than mild steel because it does not require the extra step of galvanization.


Black steel is often used in construction, while mild steel is used in various applications, including automotive and machinery parts.


Mild steel is easier to weld than black steel because it does not require pre-heating before welding.


When selecting a type of metal for your project, carefully consider the benefits of black steel and mild steel before making your decision. Black Steel offers excellent strength and durability at an affordable price. At the same time, Mild Steel provides flexibility due to its malleability plus great heat resistance properties at a lower cost than many other metals. Ultimately, which type you choose will depend on your specific needs for the project at hand, so consider each option thoroughly before committing!

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