... with tungsten, copper and nitrogen. The material type of the alloy complies with the condition for type 4d of nickel based alloy in ISO15156-3. The strength of the material is enhanced by alloying nitrogen and cold working so that it can be achieved to 125ksi of yield strength. The developed alloy has...

... temperature) of the material, which in many applications is perfectly suitable and has been justified through testing. he problem is the testing is usually conducted in an inert environment with Nitrogen or similar test media. With temperature ratings of GRE gaskets up to 150C(300F) for G-10 and 200C(392F...

... Sensitization anneal (e.g. 900 °C): None In order to understand the mechanism by which nitrogen decreases the carbon solubility, additional calculations were performed to determine the partitioning of carbon and nitrogen to the austenite phase. These calculations were performed on steels 321-C+N with Ti/(C+N...

... An ultra-high strength CRA OCTG with 140ksi grade meant for x-HPHT well applications has been developed. The strength of the material is enhanced by alloying nitrogen and cold working. In this study, the susceptibility to HE of the developed CRA was investigated. The GHSC susceptibility was evaluated...

... by the weighted sum of chromium, molybdenum and nitrogen is resulting in a pitting resistance equivalent number PREN of 54. A high nickel content supported by alloying with nitrogen offers an improvement in the thermal stability compared to other alloys known of this family. The high nickel content combined...

... chlorides air pollution control corrosion testing UNS S31277 UNS N10276 UNS S31603 UNS S31803 UNS S32750 manganese nitrogen molybdenum nickel sulfur dioxide pH sulfuric acid INTRODUCTION Coal-fired power plant flue gas desulfurization (FGD) sulfur dioxide abatement systems have experienced...

...SCC susceptibility of nitrogen bearing Ni alloy Materials Abstract A new high-strength nickel alloy OCTG with 140ksi (965MPa) grade has been developed for use at high temperature and high pressure corrosive well, using a four point bend-beam test and a slow strain rate tensile test method...

... to concerns over the effect of nitrogen levels in the parent material on the corrosion resistance and thus environmental cracking resistance of the material, parent materials containing two levels of nitrogen (0.05 and 0.1wt%) were tested. EXPERIMENTAL PROCEDURE Materials TABLE 1 SOUR SERVICE LIMITS...

... to be about 15-20 degrees higher than predicted EXPERIMENTAL Seawater Crevice Corrosion Testing Other elements that increase the amount of nitrogen in the alloy were examined such as vanadium and manganese. Vanadium also had too many negative effects on the final product, such as inclusions, and was thus...

... HP18Cr-14Ni alloys. Especially, 500 ppm C showed a detrimental effect on the corrosion resistance of the alloy in 13 kmolm⁻³ HNO₃ through sensitization. austenitic stainless steel carbon impurity intergranular corrosion nitric acid nitrogen phosphorus segregation sulfur...

... and to environmentally induced cracking under moderate sour conditions. superaustenitic nitrogen strength corrosion resistance chloride stress cracking sulphide stress cracking INTRODUCTION The superaustenitic stainless steel Nirosta® 4565 S ⁽¹⁾ UNS S34565 has been selected for process equipment...

... of the procedures can be found elsewhere [ 16 ]. Abstract The effect of nitrogen content on the environmentally-assisted cracking behavior of 22% Cr duplex stainless steel in chloride solutions was investigated. Slow strain rate tests and corrosion fatigue tests employing fracture mechanics specimens were...

... and temperature values. Moreover, the resistance of the steels appeared to be mainly dependent on their chemical composition by considering chromium, molybdenum and nitrogen additions (PREN). oil & gas sour gas localized corrosion stress corrosion cracking duplex stainless steel super-austenitic...

... stainless steel. In order to simulate N segregation, electrochemical deposition of nitrogen was performed on thin films of M0Ni4. Following polarization of nitrided and non-nitrided films, it was found by variable angle XPS that the alloy surface underwent further changes due to Ni dissolution. The end...

...According to polarization studies in 0.5M H₂SO₄ + 0.5M NaCl by Eckenrod and Kovach ³ of 18-8 stainless steels containing 0.04 to 0.24 wt% N, increasing the nitrogen concentration resulted in a significant reduction in the critical and passive current densities...

... in Tables 2 and 3 . Further pertinent details are given below: specimens that exhibited ductility on the fracture face generally showed no secondary cracking air tests resulted in ductile tearing of the weld metal welded SCC test specimens failed at the fusion line the extent of nitrogen pick-up...

... containment aboveground storage tanks leak detection regulatory compliance corrosion control nitrogen anaerobic bacteria galvanic corrosion oxidation INTRODUCTION The petroleum industry has been using storage tanks for over 65 years. The first specification for riveted tank construction was published...

...-oxidation high temperature corrosion chromium nickel silicon nitrogen rare earth metals The austenitic stainless steels and N06601 were nitrided in an ammonia vapor environment at 1100°C (2010°F) and 1200°C (2190°F). The rate of nitridation was estimated by measuring the weight change per unit surface...

.... gas permeation high pressures elastomers nitriles nylon carbon dioxide hydrogen nitrogen diffusion solubility coefficient INTRODUCTION Critical engineering applications in petroleum production equipment and other high duty applications frequently rely on elastomers to function reliably over...

... corrosion resistance CO₂-containing well environment 13%Cr martensitic stainless steels Chromium Carbon Nickel Molybdenum Nitrogen toughness productivity δ-ferrite phase cost performance L-80 grade ferritic/austenitic duplex stainless steels INTRODUCTION Thirteen-percent...