The ASTM A234 WP11 LR 90° Elbow is a low-alloy "Chrome-Moly" fitting designed for high-temperature power piping and refinery service. Containing 1.25% Chromium and 0.5% Molybdenum, it offers enhanced creep strength and resistance to graphitization compared to carbon steel. The Long Radius (LR) design provides a smooth $1.5D$ curvature to minimize pressure drop. The Butt Welding (BW) ends allow for a high-strength, permanent joint essential for high-pressure steam and hydrocarbon lines.
Technical Attributes: ASTM A234 WP11 LR 90° Elbow
Material Grade,ASTM A234 WP11 (1.25% Cr - 0.5% Mo)
Fitting Type,90 Degree Long Radius (LR) Elbow
Center-to-End Dim,1.5× Nominal Pipe Size (1.5D)
Manufacturing Std,ASME B16.9 / MSS SP-75
End Connection,Butt Welding (BW)
End Preparation,Beveled Ends per ASME B16.25
Size Range,"1/2"" to 48"" (DN15 - DN1200)"
Wall Thickness,"SCH 40, SCH 80 (XS), SCH 160, SCH XXS"
Chromium Content,1.00%–1.50%
Molybdenum Content,0.44%–0.65%
Heat Treatment,Annealed / Normalized and Tempered
Tensile Strength,≥415 MPa (60 ksi)
Yield Strength,≥205 MPa (30 ksi)
Hardness,≤197 HBW
Testing Standard,"Hydrostatic, UT, MT, RT (Optional)"
Surface Treatment,Anti-rust Oil / Transparent Coating
Traceability,Heat Number Hard Stamped
Certification,EN 10204 3.1 / MTR
Applicable Service,"High-Temp Steam, Power Plant, Refinery"
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