Similar to sandvik sanicro 28, alloy 28 is a type of ultra-low carbon nickel-iron-chromium Austenite alloy with additions of molybdenum and copper and it is stainless steel grades with the highest nickel content. It has good corrosion resistance in strong acid environment and stress corrosion cracking resistance in hydrogen sulfide (H2S) and chloride environment. In addition, it also has excellent resistance to pitting, crevice, intergranular, stress corrosion and cracking, and good weldability. Due to these outstanding corrosion properties, alloy 28 can be used in the most diverse environments.
Alloy 28 equivalent grades：
American: Incoloy028, Alloy28，UNSN08028，
Available Forms and Specifications:
Tube and pipe: ASTM B 668, EN 10216-5, SEW 400 (Feb 1991), SS 14 25 84, NFA 49-217
Plate, sheet and strip: ASTM B 709, EN 10088
Bar: EN 10088-3, EN 10272, SS 14 25 84
Fittings: ASTM A403
Melting range, °C
1350 – 1370
Tensile strength, min, Mpa
Yield strength, 0.2% offset, min, Mpa
Elongation, %, min
Alloy28 was initially developed to solve the wet-process phosphoric acid heat exchanger material. Its excellent corrosion resistance to enable it to H2S, chloride, phosphoric acid and sulfuric acid corrosion resistance, widely used in high H2S content in the oil and gas field exploitation, flue gas desulfurization system, Seawater and chloride-bearing cooling water, papermaking industry, phosphoric acid and organic acid and ester synthesis production device, is a ideal material used to replace graphite heat exchanger in the concentrated phosphoric acid.
LKALLOY is an industry leading supplier of Cr-Ni series and other high-quality stainless steel alloys. LKALLOY supply alloy 28 pipe and tube, rod which used for several applications such as condensers, heat exchangers, filters and so on.
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