Alloy 28

A11oy28-Corrosion-resistant alloy with high chromium, high molybdenum, copper and elements.

It is the grade with the highest nickel content in stainless steel. Because the Ni content is >30%, it is sometimes included in the iron-nickel-based corrosion-resistant alloy. In addition to nickel, this steel has a high Cr content and contains 3%~4% Mo and about 1.0% Cu. Therefore, it has excellent overall corrosion resistance in many strongly reducing corrosion environments, and in some oxidizing, oxidation-reduction composite, halogen-containing media, it is resistant to both overall corrosion and local corrosion. In addition, this steel has an austenitic structure, and its strength, plasticity and toughness are excellent.
A11oy28 is a steel grade with excellent comprehensive performance matching. It has excellent ability to prevent reducing or oxidizing acids, stress corrosion cracking, and corrosion caused by the use environment, such as pitting and crevice corrosion. The alloy is particularly resistant to sulfuric acid and phosphoric acid corrosion. Used in chemical processing, pollution control equipment, pipelines for oil and gas wells, nuclear fuel reprocessing, acid production and pickling equipment. It has excellent ability to prevent reducing or oxidizing acids, stress corrosion cracking, and corrosion caused by the use environment, such as pitting and crevice corrosion. The alloy is particularly resistant to sulfuric acid and phosphoric acid corrosion.

 Chemical composition:

Alloy

%

Ni

Cu

Al

Ti

Fe

Mn

S

C

Si

A11oy28

Min.

30

0.7

0.0

0.0

22 

 

 

 

 

Max.

 32

1.5

0.0

0.0


2

0.03

0.02

0.7


Physical properties:

Density

8 g/cm3

Melting point

1350-1370℃


Alloy 28 minimum mechanical properties in the room temperature:

Status

Tensile strength
Rm N/mm2

Yield strength RP0.2N/mm2

Elongation A5 %

Alloy 28

650

250

40



Product Catalog