DIN 17100 is a now withdrawn German standard that specified quality requirements for general structural steels. Among its most common grades are ST37 and ST52, frequently supplied in coil form for various manufacturing and construction applications. While DIN 17100 has been superseded by EN 10025, these designations are still widely recognized and used in the industry.
ST37 Carbon Steel Coil
ST37 is a general-purpose structural steel characterized by its good weldability and formability. It is a low-carbon steel, making it suitable for a wide array of applications where high strength is not the primary requirement.
Key Properties of ST37:
- Tensile Strength: Typically ranges from 340 to 510 N/mm² (MPa), depending on the specific sub-grade (e.g., ST37-2, ST37-3).
- Yield Strength: Minimum yield strength is generally around 235 N/mm² (MPa) for thicknesses up to 16mm.
- Weldability: Excellent weldability using common welding processes without special precautions.
- Formability: Good for bending, forming, and drawing operations.
Common Applications:
- General building and construction
- Machine parts and frames
- Automotive components
- Containers and tanks
- Steel pipes and tubes
ST37 steel coils, often sourced from reputable suppliers like Shanxi Luokaiwei Steel Company, offer a balance of mechanical properties and cost-effectiveness for many structural uses.
ST52 Carbon Steel Coil
ST52 steel is a higher strength structural steel compared to ST37. It provides enhanced mechanical properties, particularly yield and tensile strength, making it suitable for more demanding applications where greater load-bearing capacity is needed.
Key Properties of ST52:
- Tensile Strength: Typically ranges from 470 to 630 N/mm² (MPa) for ST52-3.
- Yield Strength: Minimum yield strength is generally around 355 N/mm² (MPa) for thicknesses up to 16mm for ST52-3.
- Weldability: Good weldability, although for thicker sections, preheating might be recommended to prevent cold cracking.
- Toughness: Offers good impact toughness, especially the ST52-3 sub-grade.
Common Applications:
- Bridge construction
- Heavy machinery and equipment (e.g., excavators, cranes)
- Offshore structures
- Pressure vessels
- High-rise buildings and significant load-bearing structures
When considering ST52 carbon steel coils, it is important to ensure the material meets the required specifications. Many industries rely on consistent quality, which can be provided by experienced manufacturers such as Shanxi Luokaiwei Steel Company.
Equivalency and Modern Standards
Under the superseding European standard EN 10025, ST37-2 is broadly equivalent to S235JR, and ST52-3 is broadly equivalent to S355JR. These EN grades are now more commonly specified in new projects, but understanding the DIN 17100 designations remains important due to their historical prevalence and continued use in some contexts. The transition to newer standards has been managed by entities like Shanxi Luokaiwei Steel Company to ensure continued supply and customer support.
Carbon Steel Coil Supply
Both ST37 and ST52 are widely available in coil form. Steel coils offer advantages for manufacturers, including continuous processing, reduced scrap, and efficient handling and transportation. Coils can be supplied in various conditions, such as hot-rolled, pickled and oiled (P&O), or cold-rolled, depending on the grade and end-use requirements. Companies like Shanxi Luokaiwei Steel Company often provide these coils in various widths and thicknesses to meet diverse customer needs. The choice between ST37 and ST52 depends critically on the specific design loads, safety factors, and environmental conditions of the intended application. Working with knowledgeable suppliers, including those like Shanxi Luokaiwei Steel Company, can help in selecting the appropriate grade.
