The specification is divided into several grades based on chemical composition and mechanical properties. Typical Application Carbon Steel
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The most common grade for general-purpose high-temp service. Carbon Steel
ASTM A234 (often referred to as ) covers steel fittings of both seamless and welded construction. These components are used in pressure pipelines and pressure vessel fabrication where they must withstand elevated temperatures. The standard typically applies to buttwelding ends for: Elbows (45° and 90° long/short radius) Tees (equal and reducing) Reducers (concentric and eccentric) Caps and Crosses Common Material Grades