What is the difference between parent metal and filler metal?

What is the difference between parent metal and filler metal?

• A. Filler metal is the base metal
• B. They are identical
• C. They are both filler
• D. Parent metal is the base metal; Filler metal is added to form the weld deposit

Answer: (D)

In welding, the two materials involved have distinct roles: the base metal (often called the parent metal) is the pieces being joined and remains part of the finished weld, while the filler metal is an additional material introduced to the joint. The filler metal is melted and fills the joint, becoming part of the weld deposit when it solidifies. The final weld deposit is a combination of melted filler metal and melted base metal (with possible dilution from the base metal), giving the desired strength, properties, and fill. So the correct understanding is that the parent metal is the base metal, and the filler metal is added to form the weld deposit. The other statements mix up these roles or claim they are the same, which isn’t accurate.

In welding, the two materials involved have distinct roles: the base metal (often called the parent metal) is the pieces being joined and remains part of the finished weld, while the filler metal is an additional material introduced to the joint. The filler metal is melted and fills the joint, becoming part of the weld deposit when it solidifies. The final weld deposit is a combination of melted filler metal and melted base metal (with possible dilution from the base metal), giving the desired strength, properties, and fill. So the correct understanding is that the parent metal is the base metal, and the filler metal is added to form the weld deposit. The other statements mix up these roles or claim they are the same, which isn’t accurate.