| Abstract Scope |
The use of steel castings in the design and construction of buildings and bridges is a fast-growing trend in North America. Recognized for their ability to improve the performance (strength, stiffness, fatigue) of connections, simplify the fabrication complex welded connections, and enable freeform geometry of steel, steel castings are often used to address design and construction challenges that would otherwise be very difficult to achieve using conventional welding methods.
This presentation will provide a technical discussion of the welding of ASTM A216/A216M (Steel Casting, Carbon, Suitable for Fusion Welding, for High-Temperature Service Grades WCA, WCB, and WCC) and ASTM A958/A958M (Steel Castings, Carbon, and Alloy, with Tensile Requirements, Chemical Requirements Similar to Standard Wrought Grades Grade SC 8620 Class 80/50) cast steel grades. A detailed overview of steel casting welding requirements and steel fabrication best practices will be discussed.
Presentation Learning Objectives:
• Explain how the structural properties and design of steel castings improve the performance (strength, stiffness, fatigue, safety) of welded connections.
• Describe the chemical composition and mechanical properties of steel casting grades ASTM A216/A216M Grades WCA, WCB, & WCC and ASTM A958/A958M Grade SC 8620 Class 80/50, two of the more commercially available cast steel grades in the North American market.
• Provide an overview of current North American welding code requirements.
• Describe casting weld design, (tubular and non-tubular), weld qualification, weld fabrication, welding best practices for steel castings. |