THE DIFFERENCE BETWEEN AS1163 STEEL GRADE
AS 1163 C250L0, AS 1163 C350L0, and AS 1163 C450L0 are all cold-formed electric-welded structural steel hollow sections produced according to the Australian/New Zealand standard AS/NZS 1163. They have some differences and commonalities.
Commonalities:
- Standard and Application: They all adhere to the AS/NZS 1163 standard and are suitable for structural purposes of cold-formed resistance-welded hollow sections.
- Cold-Forming: These steels are cold-formed, meaning they have not undergone subsequent heat treatment during the forming process.
- Welding Method: They are all made by connecting the edges of steel strips using resistance welding technology, with longitudinal welds.
- Quality Control: The production process of these steels emphasizes product quality and strict quality control.
- Impact Testing: All these steel grades (C250L0, C350L0, C450L0) must meet the impact test requirements at 0°C.
DIFFERENCE
| AS 1163 C250L0 | AS 1163 C350L0 | AS 1163 C450L0 | |
| Yield Strength | ≥250MPa | ≥350MPa | ≥450MPa |
| Tensile Strength | 320 MPa | 430 MPa | 500 MPa |
| Elongation | ≥22% | ≥20% | ≥16% |
| Impact Energy | minimum energy of 27J at 0°C | minimum energy of 27J at 0°C | minimum energy of 27J at 0°C |
| Chemical Composition | Carbon(C)≤0.12%, Manganese(Mn)≤0.50%, Phosphorus(P)≤0.03%. |
Carbon(C)≤0.20%, Manganese(Mn)≤1.60%, Phosphorus(P)≤0.03%. |
Carbon(C)≤0.20%, Manganese(Mn)≤1.60%, Molybdenum(Mo ) ≤0.35% . |
Applications:
- C250L0 is suitable for general construction where high strength is not a critical factor.
- C350L0 is used in areas where higher strength is required, such as in regions prone to high winds or seismic activity.
- C450L0 is used in a wide range of projects due to its high strength and formability, making it versatile for various structural applications .
In summary, the main differences between AS 1163 C250L0, AS 1163 C350L0, and AS 1163 C450L0 lie in their yield strength, tensile strength, and corresponding elongation rates. As the yield strength increases, the elongation rate decreases, indicating that the strength of the steel increases but its plastic deformation capacity decreases.
Therefore, the choice among these steel types should be guided by the specific demands and stress conditions of the engineering project in question.
