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3 . Mockler CJ , SpenceMA, Humphries A - "Fracture Toughness of a 25% Cr SuperDuplex Stainless Steel". Proc. Conf' Duplex Stainless Steels '94 (PosterSession), Glasgow, Scotland Nov 13-16 1994.4 . ContiniR, CavalIotiR and Remand L - "UR52N+ Super Duplex Stainless Steel.Offshore Application". Proc. Conf. Duplex Stainless Steels '91, Beaune,France, Oct 28-30 1991.5 . Swayne N - Marathon Oil UK Ltd, Private Communication.6 . Baxter CFG, Stevenson AW, Warburton GR - "Welding of Zeron 100 Super DuplexStainless Steel". Third International Offshore and Polare EngineeringConference. Singapore, June 19937. Stevenson AW , Gough PC, Farrar CJM - "The Weldability of Super Duplex Alloy -Welding Consumable and Procedure Development of Zeron 100". Proc. Conf.Applciation of Stainless Steels '92, Stockholm, Sweden, June 9-11, 19928. Nassau L. van, Meelker H, Hikes J - "Welding Duplex and Super Duplex StainlessSteels". Proc. Conf. Duplex Stainless Steels '91, Beaune, France Oct 28-301991.9. Baxter CFG, rwin JB, Francis R - "Weld Zone Hardness and Serviceability ofZeron 100Super Duplex Stainless Steel". Third International Offshore andPolar Engineering Conference. Singapore, June 199310. CrawfordR - Fabrication of Super Duplex test header manifold. Welding andMetal Fabrication Vol 60No. 6, July 1992 p282-284.ACKNOWLEDGEMENTThe authors wouId like to thank Weir Group PLC for.pennission to publish, and TW I forwork and advice on fracture mechanics.Zeron 100 is a registered trade name of Weir Materials Limited.

Figure 1 - 20" NB x 6 2 m Zeron 100 HIP Manifold Sections

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p l c k l e hnllnrand c a n t m t c r-chine arr ~ q u l r c d f 4 .

Figure 2 - Schematic Representarionof KIP Manufacture

Figure 4 - Results from Testingtwo parts, one HIP andone conventionallyforged. The HIP hasisotropic properties(After Reference 1 )

3001 I0 50 100 150 200f mperature (OC)

Figure 3 - Elevated Temperature TensileBehaviour of Wroughr andHIP Zeron 100

Figure 5 - Typical Charpy Impactbehaviour of HIP Zeron 100over a range of testtemperatures-

Figure 6 - Micrograph of HIP'edZeron 100

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Figure 11 - HIP Zeron 100Manifolds on Pressure Test

Figure 12 - Zeron 100Manifold constructed from non standard Tee