What is Q235 steel?
Q235 is carbon structural steel. "Q" represents yield strength, and "235" indicates a yield strength ≥ 235 MPa. It conforms to the national standard GB/T 700-2006 and is available in four quality grades: A, B, C, and D. It is a commonly used economical structural steel in the medical industry.
What are the core chemical components of Q235?
Carbon (C: 0.12%-0.20%), Silicon (Si: ≤0.30%), Manganese (Mn: 0.30%-0.70%), Sulfur (S: ≤0.045%), Phosphorus (P: ≤0.045%). Its low-carbon design ensures good plasticity and weldability.
What are the key mechanical properties of Q235?
Yield strength ≥235MPa, tensile strength 375-500MPa, elongation after fracture ≥26%, Brinell hardness 120-160HBW, Class D - 20℃ impact energy ≥27J.
Why does the medical industry choose Q235?
It offers high cost-effectiveness, good processability, excellent weldability, and strength that meets the structural requirements of non-implantable medical devices, making it suitable for manufacturing medical device frames, stents, and non-contact components.
What are the application boundaries of Q235 in the medical industry?
It is strictly prohibited for use in human implantation, direct contact with sterile medications/blood, or highly corrosive medical environments. It is only suitable for structural components of medical devices that do not directly contact the human body.