What is the minimum filler metal tensile strength required for a CJP Groove Weld column splice on material with a minimum tensile strength of 70 ksi?

For a Complete Joint Penetration (CJP) Groove Weld column splice, the minimum tensile strength of the filler metal must be at least equal to the minimum tensile strength of the base material being welded. In this scenario, the base material has a minimum tensile strength of 70 ksi.

Typically, the American Welding Society (AWS) standards suggest that the filler metal used should have a tensile strength that is equal to or greater than the base material's tensile strength to ensure adequate performance and structural integrity of the weld joint. Since the base material is rated at 70 ksi, a filler metal with a tensile strength of 60 ksi would not meet the requirements for strength and reliability.

Choosing a filler metal with a tensile strength of 70 ksi matches the strength of the base material, ensuring a strong weld that can withstand the same amount of stress. However, to provide additional performance and safety margins, the recommended standard is often to have the filler metal's tensile strength be slightly greater than that of the base material. Hence, a filler metal with a tensile strength of 80 ksi would also be suitable but is not the minimum requirement.

In summary, selecting a filler metal with a minimum tensile strength of 60 ksi is insufficient, while 70 ksi