NS3308、NS338

characteristic:

NS3308 has good resistance to pitting corrosion, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media, including wet chlorine, nitric acid, or mixed acids of oxidizing acids containing chloride ions. At the same time, NS3308 also has the ideal ability to resist the reducing and oxidizing environments encountered during the process. Relying on this versatile performance, it can be used in some headache environments, or applied in a variety of production purpose factories. NS3308 has exceptional resistance to various chemical environments, including strong oxidizing substances such as ferric chloride, copper chloride, chlorine, thermally contaminated solutions (organic and inorganic), formic acid, acetic acid, acetic anhydride, seawater and salt solutions Wait. NS3308 has the ability to resist the formation of grain boundary precipitation in the heat-affected zone of welding, so that it can be adapted to many chemical process applications in the welding state.

The chemical composition of NS3308:

%	Ni	Cr	Mo	W	C	Mn	Si	P	S
Min.	margin	20.0	12.5	2.5
Max.		22.0	14.5	3.5	0.015	0.50	0.08	0.02	0.02

NS3308 physical properties:

Density	8.9 g / cm3
Melting point	1325-1370 ℃

NS3308 The minimum mechanical properties of the alloy at room temperature:

tensile strength Rm N/mm2	yield strength RP0.2N/mm2	Elongation A5 %
690	283	40

Metallurgical structure of NS3308:

NS3308 has a face-centered cubic lattice structure.

NS3308corrosion resistance:

NS3308 alloy is suitable for a variety of chemical process industries containing oxidizing and reducing media. The higher molybdenum and chromium content makes the alloy resistant to chloride ion attack, and the tungsten element further improves its corrosion resistance.NS3308 is one of the only materials that can resist the corrosion of damp chlorine, hypochlorite and chlorine dioxide solutions. The alloy has significant corrosion resistance to high-concentration chloride solutions (such as ferric chloride and Copper chloride).

NS3308 application areas are:

W.Nr.2.4602 alloy has been widely used in chemical and petrochemical fields, such as in components and catalytic systems exposed to chloride-containing organics. This material is particularly suitable for use in high temperature, mixed inorganic and organic acids (such as formic acid and acetic acid), and seawater corrosive environments.

NS3308 Other application areas:

1. Acetic acid / acetic anhydride

2. Pickling

3. Cellophane manufacturing

4. Chlorination system

5. Complex mixed acids

6. Electro-galvanized roller

7. Expansion bellows

8. Flue gas cleaner system

9. Geothermal well

10. Hydrogen fluoride furnace cleaner

11. Incinerator cleaner system

12. Nuclear fuel regeneration

13. Insecticide production

14. Phosphoric acid production

15. Pickling system

16. Plate heat exchanger

17. Selective filtering system

18. Sulfur dioxide cooling tower

19. sulfonation system

20. Tube heat exchanger

21. Surfacing Valve

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