{"id":1540,"date":"2026-07-11T18:38:46","date_gmt":"2026-07-11T13:08:46","guid":{"rendered":"https:\/\/www.solitaire-overseas.com\/blog\/?p=1540"},"modified":"2026-07-24T11:34:02","modified_gmt":"2026-07-24T06:04:02","slug":"alloy-28-chemical-composition-for-industrial-use","status":"publish","type":"post","link":"https:\/\/www.solitaire-overseas.com\/blog\/alloy-28-chemical-composition-for-industrial-use\/","title":{"rendered":"Alloy 28 Chemical Composition for Industrial Use"},"content":{"rendered":"
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\n Quick Answer:<\/strong> Alloy 28 (UNS N08028), commercially known as Sanicro 28, is a super-austenitic stainless steel with 30–34% nickel and 26–28% chromium, built to withstand phosphoric acid, sulfuric acid, and sour gas environments. It sits between standard stainless steels and costlier nickel alloys, offering better resistance to pitting and stress-corrosion cracking than 904L<\/a> and Incoloy 825<\/a>. Solitaire Overseas supplies Alloy 28 pipes, tubes and fittings<\/a> to spec.\n<\/p>\n

There can be no such thing as material failure in the world of high stakes of industrial processing. In environments with aggressive acids and extreme temperatures, regular stainless steels are sometimes unsuitable. Here Alloy 28 material comes in super-austenitic stainless steel in order to resist the most severe conditions. This alloy is also referred to as Sanicro 28 and it is used in the oil and gas industry as well as in chemical production as a matter of fact.<\/p>\n

At Solitaire Overseas, we understand that the key to how to choose the right material begins with how it is constructed. This guide disaggregates the Alloy 28 chemical composition and explains why Alloy 28 pipes<\/a> and tubes are the best options in the critical infrastructure.<\/p>\n

What is Alloy 28 (Sanicro 28)?<\/b><\/h2>\n

Alloy 28 (UNS N08028 \/ W.Nr. 1.4563) is a high alloy multi-purpose austenitic stainless steel. Initially it was created to address the issues of corrosion in the wet process phosphoric acid industry but it has since become a universal solution to a wide range of hostile environments.<\/p>\n

The material fills the difference between inexpensive stainless steels and costly nickel alloys. It is unique in its chemistry making it resistant to attack by strong acids and highly mechanically resilient.<\/p>\n

The Breakdown: Alloy 28 Chemical Composition<\/b><\/h2>\n

The effect of the Sanicro 28 is the direct result of the particular elemental balance. Alloy 28 chemical composition, unlike the common 316 or 304 stainless steel, contains a high amount of nickel and chromium, with molybdenum and copper fortification.<\/p>\n

According to the industry standards, the standard composition is as follows:<\/p>\n