Choosing the Right Steel for Your Project: MS vs. SS vs. GI

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Did you know that the type of steel you choose can significantly impact the success of your project? However, with a multitude of choices available and a limited understanding of the topic, steel selection for your project can feel overwhelming. Hence, understanding the differences between Mild Steel, Stainless Steel, and Galvanised Iron is paramount, especially when sourcing from a reputable structural steel supplier marketplace like Headsup B2B. Each steel type carries unique properties suitable for different projects due to its nature and scope. As we address the steel selection process, we'll also explore how the team at Headsup B2B helps its customers find the right steel supplies for their projects.

Secrets of Structural Steel: About Three Types Steel

Mild Steel

In the production of mild steel, manufacturers mix iron and carbon, creating a versatile and affordable metal widely used in numerous engineering tasks. Mild steel typically contains a carbon content ranging between 0.16% and 0.29%, with a relatively high melting point between 1450°C and 1520°C. It melts at a higher temperature compared to steel with more carbon, which makes it good for forging, cutting, drilling, welding, and other things.

Stainless Steel

Stainless steel, like other varieties of steel, consists of an alloy of two or more distinct elements. Iron and a small quantity of carbon constitute the primary ingredients for all steel types. However, stainless steel distinguishes itself by containing at least 10.5% chromium. The exact amounts and compositions may vary depending on the grade, specific requirements, and intended applications.

Galvanised Iron

Galvanised Iron is one of the most versatile and popular types of steel because it has excellent anti-rust features. GI has a layer of zinc, which acts as a barrier against rust as well as other atmospheric effects. Besides, the coating makes the GI more durable and long-lasting while giving it additional stiffness and structural strength, thereby making it suitable for various construction projects such as roofing, fencing, structural beams, and pipes.

Variations Among Structural Steel Types: A Guide to Choosing the Right Structural Steel Supplier

For the right selection of the appropriate steel and structural steel supplier for construction work, it is important to have a clear understanding of the properties and distinctions among Mild Steel (MS), Galvanised Iron (GI), and Stainless Steel (SS). All three steel types have their merits that make them applicable in different conditions.


  • Stainless Steel: Contains chromium, nickel, and sometimes molybdenum, providing the steel with the ability to resist corrosion or rusting. The chromium gives the steel a glossy, brilliant shine and increases resistance to corrosion and tarnishing.

  • Mild Steel: Primarily made of iron and carbon, with low carbon content, making it more ductile when heated.

  • Galvanised Iron: Plain iron or steel coated with a layer of zinc to prevent corrosion.

Corrosion Resistance Ability of Three Steel Types

  • Stainless Steel: Highly resistant to corrosion, making it suitable for various applications with high moisture or chemical exposures.

  • Mild Steel: Prone to corrosion when exposed to moisture and atmospheric conditions, necessitating protective coatings or treatments.

  • Galvanised Iron: Offers good corrosion resistance due to the zinc coating, protecting the underlying iron or steel from rusting.


  • Stainless Steel: Has a shiny, metallic appearance and is often used in applications where aesthetics are important, such as architecture and interior design.

  • Mild Steel: Typically has a dull grey finish, unless it's polished or coated for decorative purposes.

  • Galvanised Iron: This appears greyish or matte due to the zinc coating, which can vary in appearance based on the thickness of the coating.


  • Stainless Steel: Generally more expensive than mild steel and Galvanised iron due to its corrosion-resistant properties and manufacturing process.

  • Mild Steel: Among the most affordable options for structural and industrial applications.

  • Galvanised Iron: Typically more cost-effective than stainless steel but may be slightly more expensive than untreated mild steel due to the galvanisation process.


  • Stainless Steel: Because of its strength and resistance to corrosion, stainless steel has extensive applications in the construction, automotive, food processing, medical equipment, and aerospace industries.

  • Mild Steel: Generally used in construction, machinery, automotive manufacturing, and general engineering applications.

  • Galvanised Iron: Suitable for outdoor structures, roofing, fencing, and marine applications where corrosion resistance is required.


  • Stainless Steel: Requires minimal maintenance due to its corrosion-resistant properties, making it suitable for long-term use without significant degradation.

  • Mild Steel: Requires periodic maintenance such as painting or coating to prevent corrosion, especially in outdoor or high-moisture environments.

  • Galvanised Iron: requires minimal maintenance due to the protective zinc coating, but scratches or damage to the coating may require touch-ups to maintain corrosion resistance.

How Headsup B2B Helps in the Right Steel Selection for Construction?

Being the most experienced and reliable structural steel supplier marketplace for construction, the team at Headsup B2B understands that for the best steel selection, you need in-depth knowledge of some factors like the application, environment, budget, and required properties (corrosion resistance and strength). Each steel type has some advantages and also some limitations.

So, to assist our clients with the best steel for their projects, we have a dedicated team of experts. The team suggests the right product, keeping your budget and project requirements as a priority.

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