DD11 vs. S355
What's the Difference?
DD11 and S355 are both low carbon steel grades that are commonly used in structural applications. However, there are some key differences between the two. DD11 is a hot rolled steel with a relatively low tensile strength and good formability, making it suitable for applications where shaping and bending are required. On the other hand, S355 is a higher strength steel with a minimum yield strength of 355 MPa, making it more suitable for heavy-duty structural applications where strength is a primary concern. Overall, the choice between DD11 and S355 will depend on the specific requirements of the project at hand.
Comparison
| Attribute | DD11 | S355 |
|---|---|---|
| Material Type | Steel | Steel |
| Strength | Low | High |
| Yield Strength | 170-360 MPa | 355 MPa |
| Tensile Strength | 440 MPa | 510-680 MPa |
| Thickness | 1.5-3 mm | 1-100 mm |
Further Detail
Introduction
When it comes to choosing the right material for a project, it's important to consider the specific attributes of each option. In this article, we will compare DD11 and S355, two commonly used steel grades, to help you make an informed decision.
Chemical Composition
DD11 is a low carbon steel with a maximum carbon content of 0.12%. It also contains manganese, phosphorus, and sulfur as impurities. On the other hand, S355 is a structural steel with a higher carbon content of up to 0.23%. It also contains manganese, silicon, and copper as alloying elements.
Strength and Hardness
DD11 has a relatively low tensile strength compared to S355, making it suitable for applications that do not require high strength. It has a hardness of around 170 HB. In contrast, S355 has a higher tensile strength, making it ideal for structural applications where strength is crucial. It has a hardness of around 190-220 HB.
Formability and Weldability
DD11 is known for its excellent formability, making it easy to shape and manipulate into various forms. It is also highly weldable, allowing for easy joining of different components. On the other hand, S355 is less formable than DD11 due to its higher strength. However, it is still considered weldable, although special precautions may be required.
Corrosion Resistance
DD11 has poor corrosion resistance due to its low carbon content and lack of alloying elements. It is prone to rusting and may require additional coatings for protection. In contrast, S355 has better corrosion resistance thanks to its alloying elements such as copper. It is suitable for outdoor applications where exposure to the elements is a concern.
Applications
DD11 is commonly used in the automotive industry for the production of panels, chassis components, and other non-structural parts. It is also used in the manufacturing of household appliances and furniture. On the other hand, S355 is widely used in construction for building frames, bridges, and other structural components. It is also used in the manufacturing of machinery and equipment.
Cost
DD11 is generally more affordable than S355 due to its lower alloy content and simpler production process. It is a cost-effective option for projects that do not require high strength or corrosion resistance. On the other hand, S355 is a premium steel grade with higher strength and better properties, making it a more expensive choice for applications that demand superior performance.
Comparisons may contain inaccurate information about people, places, or facts. Please report any issues.