Offset yield strength
The conventional yield strength is the maximum tensile stress at which a material still deforms plastically and reaches a defined strain of about 0.2%. It's used when no clear yield point is visible on the diagram.
Physicochemical mechanism of action
The conventional yield strength (CSG) refers to the maximum tensile stress at which a material remains plastically deformable and reaches a deformation of about 0.2%. This value is often used when no clear yield point is visible in the stress-strain diagram.
Metallurgical relevance & risks during welding
If the conventional yield strength is exceeded, the material may transition into a glass-hard state. This increases susceptibility to cracking and changes the mechanical behavior of the material. When welding, it is important to ensure that stresses remain below this limit to guarantee a safe and tough joint.
Workshop practice & instructions
To ensure that the conventional yield strength is not exceeded, the following measures should be taken:
• Limit the maximum tensile stress during welding to 90% of the CSG.
• For heavy materials or high stresses, control and slow down the cooling to stabilize the microstructure.
• If necessary, a mechanical test can be performed to determine the actual yield strength of the material.