RA Power Solutions, with 45 years of experience, has been successfully repair heavy cast iron, aluminum, bronze, and cast steel parts using the metal stitching and metal locking process. This is a cold process, and no heat is generated. For more information about cast-iron crack repair, please email us at [email protected] or call us at +91 9582647131. https://metalstitchinglocking.com/process-for-repair-of-cracks-and-broken-casting/