UNS N08028/EN 1.4563/Alloy 28 Stainless Steel

Alloy 28 steel plates, alloy 28 stainless steel bars

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 grade with the highest nickel content. It has good corrosion resistance in a strong acid environment and stress corrosion cracking resistance in hydrogen sulfide (H2S) and chloride environments. 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: Incoloy 028, Alloy 28, UNS N08028,

Chinese: 00Cr27Ni31Mo3Cu, 00Cr27Ni31Mo4Cu

German:1.4563 – X1NiCrMoCu31-27-4

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

Chemical composition:

Material C Si Mn Cr Ni Mo P S
N08028 ≤0.03 ≤1.0 ≤2.5 26.0~28.0 29.5~32.5 3.0~4.0 ≤0.03 ≤0.03
1.4563 ≤0.02 ≤0.7 ≤2.0 26.0~28.0 30.0~32.0 3.0~4.0 ≤0.03 ≤0.01

Mechanical Properties:

Density, g/cm³ 8.0
Melting range, °C 1350 – 1370
Tensile strength, min, Mpa 650
Yield strength, 0.2% offset, min, Mpa 250
Elongation, %, min 40
Hardness, HB 155


Alloy28 was initially developed to solve the wet-process phosphoric acid heat exchanger material. Its excellent corrosion resistance enables 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 an ideal material used to replace graphite heat exchanger in the concentrated phosphoric acid.

LKALLOY is an industry-leading supplier of the Cr-Ni series and other high-quality stainless steel alloys. LKALLOY supplies alloy 28 pipe and tube, the rod which used for several applications such as condensers, heat exchangers, filters, and more.

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