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High Quality CRA solutions by Electro Slag Process for Austenitic Stainless Steels, 625 & 825 Single & Multiple Layer Solutions

Picture for High Quality CRA solutions by Electro Slag Process for Austenitic Stainless Steels, 625 & 825 Single & Multiple Layer Solutions
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Within many features of the Electro Slag Strip Cladding (ESSC) technique, one of the most attractive is the opportunity to achieve a required clad metal chemical analysis in one single layer. All these CRA 308L, 316L, 347, 625 & 825 types frequently concern fabricators who are constantly demanding for ways to reduce production costs & thicknesses of CRA. Hence, new low dilution and high-travel speed solutions have been developed with the aim to reduce the thickness and/or the number of layers in order to answer to industry expectations in terms of productivity. Through controlling dilution with the parent metal and balancing the chemistry by means of the new fluxes, it has been possible to achieve high quality results with an iron content Fe <7% & Fe < 10% for 625 cladding in a single layer where traditional ESSC requires two layers for the same objective. Also, for Alloy 825, single and thin layer solutions have been achieved. This subject presents an overview of these new developments with details on the applied welding conditions and the quantitative results achieved, showing benefits in terms of material savings and productivity gains.

Product Number: MPWT19-14343
Author: JP Van Nieuwenhoven
Publication Date: 2019
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Picture for Diffusion Rate and Chemical Composition Variance of Nickel Alloys 625 Vs. 825 Multi-Layers
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Diffusion Rate and Chemical Composition Variance of Nickel Alloys 625 Vs. 825 Multi-Layers

Product Number: MPWT19-15029
Author: Mohammad Al Sultan, Ahmed Al Maghlouth
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In this paper, a detailed analysis was performed to define the variance between both Nickel alloys 825 and 625 Multi-alloys. A comprehensive experiment and testing was done to evaluate both mechanical and chemical properties for the flanges with weld overlay, fittings and pipe components. The results of the study indicated several challenges and the gaps between both materials. Therefore, an initiative was led to promote the current process in order to prevent reoccurrence and mitigate associated consequences of failure by investigating and defining the root cause analysis. In order to ensure bridging the gaps, the paper concludes with a list of recommendations for the actions taken towards the material and vendor quality in order to proceed forward with the corrective actions and precautions for utilization whenever different PMI readings are found in cladding to continue supplying high quality products as expected.
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96427 Time-Temperature-Sensitization and Time-Temperature-Precipitation Behavior of Alloy 625

Product Number: 51300-96427-SG
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