NS321、NS3201、N12MV

characteristic:

NS321 is suitable for the manufacture of hot concentrated hydrochloric acid and hydrogen chloride gas devices, and is used in internal combustion engines and rocket engine parts. It still has good strength at 1095 ° C.

 

NS321 chemical composition:

Alloy	%	C	Mn	P	S	Si	Cr	Mo	Ni	Fe	Co	V
NS321	Min.							26.0		4.0		0.2
	Max.	0.05	1.0	0.04	0.03	1.0	1.0	30.0	base	6.0	2.5	0.4

NS321physical properties:

Density	9.24g/cm3
Melting point	1330-1380℃

NS321 minimum mechanical properties

Alloy and condition	tensile strength Rm N/mm2	yield strength RP0.2N/mm2	Elongation A5 %
NS321	690	310	40

 

NS321 alloy has the following characteristics

1. Control the minimum content of iron and chromium to prevent the formation of β phase Ni4Mo.

2. Excellent corrosion resistance to reducing environment.

3.Excellent resistance to moderate concentration of sulfuric acid and many non-oxidizing acids.

4. Very good resistance to chloride ion stress corrosion cracking (SCC).

5. Excellent resistance to various organic acids.

 

NS321 metallographic structure:

NS321 has a face-centered cubic lattice structure. By controlling the iron and chromium content to a minimum, processing brittleness is reduced and the precipitation of the Ni4Mo phase at 700-870 ° C is prevented.

 

NS321 corrosion resistance:

The nickel and molybdenum alloy Hastelloy B has extremely low carbon and silicon content, which reduces the precipitation of carbon and other impurity phases in the heat-affected zone of the weld, so its welds also have sufficient corrosion resistance.

 

NS321 Application areas Application areas are:

The alloy NS321 has a wide range of applications in the fields of chemistry, petrochemicals, energy manufacturing, and pollution control, especially in industries such as sulfuric acid, hydrochloric acid, phosphoric acid, and acetic acid.

 

Special alloy materials commonly used in the chemical industry:

Stainless steel: 253MA, 316L, 353MA, 654SMO, 904L, etc.

Nickel-based alloys: Alloy 31, Alloy 59, Hastelloy B, Hastelloy C, Hastelloy C-276, etc.

Corrosion-resistant alloys: NS112, NS322, NS333, NS335