Joining multiple metal parts together into a single, cohesive unit is an indispensable process to manufacturing. Bolts, screws, and adhesives are often used to unite separate parts, but many applications call for a more solid connection. Thanks to the craft of welding, manufacturers are able to effectively create a single part from multiple components. Casting facilities are also able to use welding to repair minor casting defects, improving overall process efficiency and reducing part cost.

Understanding the weldability of various alloys is key to creating welds that last and parts that perform in the field. As a mechanical property, weldability is also an important consideration in designing and producing cast parts.

Eagle Group casting facilities consistently receive top marks in customer satisfaction, scrap rates and return rates, but even with our commitment to quality and rigorous product development process, our castings occasionally require post-solidification adjustments prior to delivery. "Across all of our 2,000-plus part numbers, under 10% of castings fall out for repair," according to Eagle Alloy Chief Sales Officer, Jeff Cook, "and some part numbers have 1% or less." While the percentage is small, the cost of scrapping repairable defects can raise part price and delay delivery. For those reasons, many world-class casting facilities strongly recommend that customers allow weld repair at the foundry's discretion.

When done right, weld repaired castings are just as structurally and functionally sound as their non-welded counterparts. However, weld repair in steel castings is often misunderstood by casting customers. Some companies simply do not allow weld repair, and others place strict requirements on where weld repair can take place on a part. By better understanding the effects of weld repair on part appearance and functionality, casting customers can benefit from weld repair strategies that optimize cost, production time and part quality.