Sour Service, Duplex SS, Delta Ferrite, Sensitization, PWHT SS, Weld Decay, PREN, ASTM A262, ASTM G48, Corrosion Types, EN 10204, P91/P92
In the world of metallurgy and welding, certain alloy steels are revered for their exceptional high-temperature properties, among them being P91 and P92. These alloys find extensive use in power plants, industrial boilers, and other high-temperature applications. However, there’s an interesting restriction imposed on these materials: the combined content of Nickel (Ni) and Manganese (Mn) […]
Welding P91 material, a high-strength, heat-resistant alloy often used in high-temperature applications such as power plants, requires careful consideration of the welding process and the choice of welding electrodes. Both E9015-B91 and E9018-B91 electrodes can be used for this purpose, but E9015-B91 is preferred.
The selection of a specific welding electrode for welding stainless steel, such as SS321, depends on various factors including the application, welding process, and the desired properties of the weld joint. E347 and E321 are both stainless steel welding electrodes, but they have different chemical compositions and are designed for different purposes: Chemical composition of
EN ISO 10204 is a standard that specifies requirements for the inspection and testing of metallic products. The differences between the various types of inspection certificates defined by EN ISO 10204 are as follows:
In the world of materials science and engineering, corrosion is a persistent and costly problem. From the structural integrity of industrial components to the longevity of everyday consumer products, corrosion poses a significant threat. To combat this issue, rigorous testing methods have been developed to assess the corrosion resistance of materials. One such method is
IGC testing A262 Practice E refers to a standard test method used to evaluate the intergranular corrosion (IGC) resistance of stainless steel and high-alloy materials. This test method, described in Practice E of ASTM International standard A262, involves immersing specimens of the material in a solution of nitric acid and ferric nitrate.
Stainless steel is renowned for its exceptional corrosion resistance, making it a popular choice for various applications, including construction, food processing, and chemical industries. However, understanding the metallurgy of stainless steel, particularly in the context of welding and post-weld heat treatment (PWHT), is crucial. In this article, we will discuss why PWHT for stainless steel
Role of Delta Ferrite in Stainless Steel Welding
Delta ferrite is a type of ferrite, a crystalline structure that forms during the solidification of some metals and alloys, including stainless steel. The presence of delta ferrite in a welded joint of stainless steel is important because it affects the mechanical properties and corrosion resistance of the welded joint.
The oil and gas industry is characterized by the usage of materials used in equipment and pipelines under conditions that are harshest in the world. Sour service environments, where hydrogen sulfide (H2S), carbon dioxide (CO2), and other corrosive elements are found, challenge the integrity and safety of such materials. In order to avoid corrosion and
Sour service, in the the oil and gas industry, is a term used to describe the conditions in which equipment, pipelines, and infrastructure come into contact with corrosive and hydrogen sulfide-rich environments. These harsh conditions can lead to corrosion and other forms of damage, making sour service an important consideration for the safety and integrity