SAF. ;3006---A completely new and advanced super duplex steel tube developed specifically for acidic environments
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This post was last edited by Desert Fish on 2024-5-3 11:16. SAF™3006 is a high-alloy duplex stainless steel developed to enhance its corrosion resistance in acidic and alkaline environments. This new alloy represents an upgrade to traditional super duplex stainless steels, expanding the company’s portfolio of duplex steel products that it continues to develop; it is primarily used in heat exchangers in the chemical and petrochemical industries. Alleima He Rui Mai is a global manufacturer of high-value-added products made from advanced stainless steel and special alloys. Since the 1960s, the company has been at the forefront of developing modern duplex stainless steel grades, and it now offers a wide range of products to the market. “We are pleased to have this new super duplex stainless steel added to our ever-expanding product portfolio. It provides ‘new double-phase stainless steel weapons’ for those customers who face the threat of acid corrosion when using heat exchangers, thereby offering them additional advantages. With the introduction of SAF™3006 (UNS S83071), we have strengthened our position in bifacial steel materials developed for acidic corrosion, and we see strong growth potential in this application area. The products can be applied in alkali evaporators, acid coolers, and evaporators. ”said Eduardo Perea, EMEA Market and Product Manager at Alleima Heirui Mai.
Pioneering the duplex steel revolution: Alleima played a pioneering role in the \"duplex steel revolution\" of the 1960s and 1970s, introducing a more cost-effective alternative to stainless steel that could replace the more expensive nickel-based alloy grades, and continued to innovate in this field. Duplex stainless steel has an austenite-ferrite 50:50 structure; its strength is more than twice that of standard stainless steel, and it boasts excellent corrosion resistance. The groundbreaking SAF™2507 (UNS S32750) was introduced by Alleima in 1985, nearly four decades ago, and set the industry standard for resisting wet corrosion in various industrial applications. SAF™2507 is renowned for its excellent performance in corrosive conditions, offering superior resistance to stress corrosion cracking (SCC), pitting, and crevice corrosion in chloride-containing environments.
Developed specifically for acidic environments, Eduardo Perea said, “SAF™3006 will be a upgraded version of SAF™2507, designed to handle the corrosive conditions faced by heat exchanger tubes exposed to hydrochloric acid, sulfuric acid, formic acid, or other acids.” This is our specially developed super duplex steel pipe for acid resistance. ”Daniel Gullberg, product development manager for CRA (Corrosion-Resistant Alloys), said, “From a R&D perspective, this new super duplex steel reflects the market’s keen interest in optimizing materials resistant to acid corrosion.” In the past, most of our duplex steels were developed with a focus on chloride resistance, possessing high pitting resistance equivalents (PRE) that enable them to resist pitting and crevice corrosion. For acid-resistant service conditions, the priority is not that high. Today, we have fine-tuned the chemical composition to provide better resistance to acidic environments. This includes a 30% high chromium content and a 3.2% molybdenum content to maintain good structural stability and balance of the alloying elements. ”
Oscar Öhlin, a R&D engineer at Alleima, the new product designed for harsh acidic environments, said: “SAF™3006 is an upgrade over existing duplex steel grades; it can handle higher than expected corrosion rates resulting from an extended design life.” You can enjoy all the advantages of traditional duplex steel in terms of strength, weight, and cost-effectiveness, while at the same time it also possesses acid resistance. It is applicable whether there are acid plants with seawater cooling or not. ” From research and development to the final product, SAF™3006 is manufactured through Alleima’s fully integrated value chain, under strict quality control and with a strong emphasis on sustainable production. The pipes are made from over 80% recycled steel and are melted and produced using highly fossil fuel-free energy. The seamless tubes of SAF™3006 will be available in standard heat exchanger sizes. To support the chemical and petrochemical industries, Tom Eriksson, Executive Vice President and Head of R&D at Alleima, summarized by saying: “The introduction of SAF™3006 marks the continuation of the revolution in duplex steels that Alleima began decades ago and has continued to develop; it now represents a whole new alloy designed specifically for use in heat exchangers under acidic conditions.” We look forward to working with our clients to meet their further needs. ”
Are there any data on strength and corrosion resistance? I’m keeping a close eye on it