W.Nr.2.4858、NiCr21Mo

Overview of W.Nr.2.4858corrosion-resistant alloy:

It is a fully austenitic nickel-iron-chromium alloy stabilized with titanium and added with copper and molybdenum. ns142 is a versatile engineering alloy that has resistance to acids and alkalis in both oxidizing and reducing environments.

The high nickel content gives the alloy effective resistance to stress corrosion cracking. Corrosion resistance in various media is very good, such as sulfuric acid, phosphoric acid, nitric acid and organic acids, alkali metals such as sodium hydroxide, potassium hydroxide and hydrochloric acid solutions. The higher comprehensive performance of ns142 is shown in the nuclear combustion dissolvers with various corrosive media, such as sulfuric acid, nitric acid and sodium hydroxide are all processed in the same equipment.

 

W.Nr.2.4858 corrosion resistant alloy chemical composition:

%	C	Si	Mn	P	S	Cr	Mo	Al	Fe	Cu	Ti
Min.						19.50	2.50		margin	1.50	0.60
Max.	0.05	0.50	1.00	0.030	0.030	23.50	3.50	0.20		3.00	1.20

 

W.Nr.2.4858 corrosion resistance alloy physical properties:

Density	8.1 g/cm3
Melting point	1370-1400 ℃

 

Mechanical properties of W.Nr.2.4858 corrosion-resistant alloy at room temperature:

tensile strength Rm N/mm2	yield strength RP0.2N/mm2	Elongation A5 %
≥550	≥220	≥35

 

W.Nr.2.4858 corrosion-resistant alloy has the following characteristics:

● Good resistance to stress corrosion cracking.

● Good resistance to pitting corrosion and crevice corrosion

● Good anti-oxidation and non-oxidizing thermal acid properties

● Good mechanical properties at room temperature and high temperatures up to 550 ℃

● Certificate of pressure vessel with manufacturing temperature up to 450 ℃

 

W.Nr.2.4858 corrosion-resistant alloy applications:

Used in various industrial fields with a temperature not exceeding 550 ℃, such as: heating pipes, containers, baskets and chains used in sulfuric acid pickling plants, seawater cooling heat exchangers, marine product piping systems, acid gas environmental piping, phosphoric acid production Heat exchanger, evaporator, washing, dip tube, etc., air heat exchanger in petroleum refining, food engineering, chemical process, flame retardant alloy for high pressure oxygen application, etc.