Iron castings - Frequently Asked Questions Email: firstname.lastname@example.org Tel.: 513-421-6550 Fax: 513-421-6552 Search Toggle navigation Erhart Foundry and Machine Co. Home Why Castings? Why Erhart? Capabilities FAQ Contact Us Go! Iron Foundry and Iron Casting FAQ Frequently Asked Questions Search Search Categories Iron Castings Questions What is gray iron? What is ductile iron? What is a jobbing foundry? What is a sand casting foundry? What is a no-bake foundry? What type of foundry is Erhart Foundry? Where can I find safety data sheets for Erhart castings?