st37 steel: an ideal choice for building durable structures

As we know, the production of steel products in the industrial world is vast and diverse. The manufacturing process and mechanical properties of all steel products can vary significantly depending on the type of project and the specific requirements of the material.
Among the most widely used and popular steels in construction and manufacturing industries are ST37 and ST22 steels. While we have previously discussed the differences between ST37 and ST22 steels, as well as the physical and mechanical properties of ST37, in this article, we will delve deeper into why ST37 steel is considered a more suitable and ideal option for various construction projects.
Introducing ST37 Steel
ST37 steel is one of the most fundamental and widely used steels available on the market, categorized as low-carbon steel. Due to its excellent mechanical properties, high strength, and several key capabilities, it is an ideal choice for a wide range of applications. Some of the outstanding applications of ST37 steel include construction, and the production of various steel sections such as I-beams, scaffolding pipes, profiles, angles, and hollow sections.
SAFA Company is one of the largest leading producers of heavy profiles, light profiles, profile pipes, profile tubes, and various iron tubes suitable for greenhouse structures in Iran. SAFA products are all manufactured with the highest quality and meet international JIS and DIN standards. SAFA uses the highest quality ST37 steel in the manufacturing process of its steel products.
In the following sections, we will comprehensively examine the properties, advantages, applications, and standards of ST37 steel, and explain why this steel is considered one of the best options for building durable and resistant structures.
Mechanical Properties of ST37 Steel
As a low-carbon steel alloy, ST37 exhibits an exceptional balance between strength, toughness, and ductility. This balance makes it an ideal choice for a wide range of industrial and construction applications. The high tensile strength of ST37 enables it to withstand heavy loads and be used in massive structures such as bridges and high-rise buildings. The suitable toughness of this steel increases its resistance to impact and shock, preventing sudden fractures. Additionally, the high ductility of ST37 allows for the creation of complex and diverse components. These properties, combined with excellent fatigue resistance, make ST37 a versatile engineering material with high reliability.
Chemical Composition and Its Impact on the Properties of ST37 Steel
The chemical composition of ST37 steel is the key to understanding its unique mechanical properties. This alloy is primarily composed of iron, with elements such as carbon, manganese, and silicon. Each of these elements plays a specific role in determining the final characteristics of the steel. For instance, increasing the carbon content increases the steel's strength but reduces its toughness. Manganese, in addition to improving yield strength, also increases the steel's wear resistance. Silicon, by increasing tensile strength and reducing the steel's brittleness, significantly contributes to improving its overall properties. In summary, the precise interaction of these elements gives ST37 steel its unique properties and makes it suitable for a wide range of industrial applications. But does ST22 steel also have similar capabilities? Why do we focus so much on ST37 steel?
The answer to this question will be clear in the following sections, especially in the comparison table of compositions and mechanical properties.
Comparison of ST37 Steel with ST22 Steel
ST37 steel is often compared to ST22 steel. Although both steels are classified as low-carbon steels, ST37 has more specific mechanical and physical properties compared to ST22. These specific properties make ST37 more suitable and efficient for a wider range of applications.
Comparison table of chemical compositions of two steels |
||
The element |
Weight percentage range of st37 steel |
Weight percentage range of st22 steel |
carbon (C) |
0.12 to 0.17 percent |
0.10 to 0.15 percent |
Manganese (Mn) |
0.4 to 0.6 percent |
0.4 to 0.6 percent |
Silicon (Si) |
0.10 to 0.35 percent |
0.10 to 0.25 percent |
phosphorus (P) |
less than 0.04 percent |
Maximum 0.04 percent |
Sulfur (S) |
less than 0.05 percent |
Maximum 0.05% |
Copper (Cu) |
less than 0.4 percent |
Maximum 0.4 percent |
nickel (Ni) |
less than 0.4 percent |
Maximum 0.4 percent |
chromium (Cr) |
less than 0.15 percent |
A maximum of 0.15 percent |
Aluminum (Al) |
less than 0.06 percent |
Maximum of 0.06 percent |
As the table shows, ST37 steel outperforms ST22 steel in all aspects, making it a much more suitable option.
Mechanical properties |
steel st37 |
steel st22 |
Tensile strength |
Maximum 470 MPa |
Maximum 320 MPa |
Yielding strength |
Maximum 370 MPa |
Maximum 280 MPa |
Toughness |
28 joules per square meter |
26 joules per square meter |
Hardness |
Maximum 160 Brinell |
Maximum 140 Brinell |
Hit resistance |
10 J/cm2 max |
Max 8 J/cm2 |
Fatigue |
Maximum 150 MPa |
Maximum 140 MPa |
Applications of ST37 Steel
As discussed in previous sections, ST37 steel has better mechanical properties than ST22 steel and naturally has fewer limitations. Therefore, the range of applications for ST37 steel is vast. In general, due to its favorable mechanical properties and competitive price compared to other similar steels, ST37 steel is used in various industries. Thanks to the golden range of 0.12 to 0.17 percent carbon in ST37 steel, in addition to its exceptional strength, this steel also has high ductility. This is why ST37 is used in the construction industry for producing steel skeletons of buildings, warehouses, I-beams, angles, channels, reinforcing bars, sheets, and construction profiles. On the other hand, in manufacturing industries, ST37 steel is used to produce various industrial profiles such as heavy profiles, light profiles, profile pipes, profile tubes, and various iron tubes.
Furthermore, as previously mentioned, this steel falls under the category of low-carbon steels. This characteristic endows ST37 steel with excellent weldability, allowing it to be used for a broader range of applications through welding processes. It is employed in the construction of various water and wastewater pipes and storage tanks. The high strength of ST37 steel has led to its application in shipbuilding and bridge construction. The combination of high weldability, strength, and weldability suitability makes this steel ideal for manufacturing chassis, bodies, and engines of various automobiles.
Some other applications of this steel include:
Automotive industry: Vehicle chassis, various body components, and body reinforcement structures
Energy industry: Construction of various wind turbines, power plant structures, power transmission towers, and solar panel structures
Advantages of Using ST37 Steel
Durability and longevity: ST37 steel is resistant to corrosion, abrasion, and fatigue, increasing the service life of structures.
Cost-effectiveness: The reasonable price of ST37 steel, coupled with low maintenance costs, makes it an economical choice.
Ease of construction and installation: Excellent weldability, high ductility, and relatively low weight facilitate the construction and installation process of steel structures, reducing project duration.
Safety: High safety standards and good impact resistance make ST37 steel suitable for structures where safety is a paramount concern.
Environmentally friendly: The possibility of recycling ST37 steel and reducing waste production makes it an environmentally friendly choice.
Easy accessibility: Due to the popularity and widespread use of ST37 steel, it is readily available on the market through various suppliers. This advantage facilitates quick and easy access to high-quality materials for various projects.
ST37 Steel: An Exceptional Choice for Durable Structures
Safa Company, as one of the most reputable steel producers in Iran, is proud to offer ST37 steel to its customers with the highest quality, competitive pricing, and special conditions. By leveraging the latest technology and modern equipment, we produce products that meet the highest standards and always prioritize customer satisfaction.
ST37 steel, with its unique combination of strength, formability, and affordability, is considered a wise choice for a wide range of construction and industrial projects. The outstanding track record of this steel in the construction industry is a testament to its quality and performance, making ST37 a reliable option for engineers, designers, and builders.