What is SM490A steel material

SM490A steel is a low carbon, high strength structural steel specified in JIS G3106 standard. Here are some key points about SM490A material:

1. Composition: SM490A steel typically contains elements such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), and trace amounts of alloying elements like copper (Cu), chromium (Cr), nickel (Ni), and molybdenum (Mo).

2. Properties:
- Strength:SM490A steel has a minimum yield strength of 325 MPa and a minimum tensile strength of 490-610 MPa.
- Ductility: It offers good ductility and weldability characteristics.
- Impact Resistance: SM490A steel exhibits excellent impact resistance at room temperature.

3. Applications:
- Structural Applications: SM490A steel is commonly used in construction and structural applications where high strength and good weldability are required.
- Bridges and Buildings: It is suitable for building structures, bridges, machinery parts, and other general engineering purposes.
- Weldability: Due to its good weldability, SM490A is often used in welded structures.

4. Standards:
- JIS Standard: SM490A steel conforms to the Japanese Industrial Standards (JIS) G3106 for hot-rolled steels for welded structure.
- Equivalent Grades: Internationally, SM490A steel material may be equivalent to ASTM A572 GR50 and EN S355JR steel grades.

5. Heat Treatment: SM490A steel is generally supplied in normalized or controlled rolling condition, but it can also be provided in other heat treatment conditions based on specific requirements.

In essence, SM490A steel is a versatile structural steel known for its high strength, good weldability, and suitability for various construction and engineering applications where strength and structural integrity are paramount.