What material is NS3304 nickel-based alloy?

NS3304 Main Features

Over 50 years of proven performance in a variety of corrosive chemicals

Alloy NS3304 is the first A forged nickel-chromium-molybdenum material that alleviates welding problems. As a result, it is widely accepted in chemical process and related industries and has proven its performance in a wide range of corrosive chemicals for over 50 years now.

Like other nickel alloys, NS3304 is ductile, easy to form and weld, and has excellent resistance to stress corrosion cracking (a degradation to which austenitic stainless steels are susceptible) in solutions containing chlorides form). Due to its high chromium and molybdenum content, it is able to withstand oxidizing and non-oxidizing acids and exhibits excellent resistance to pitting and crevice corrosion in the presence of chlorides and other halides. Additionally, it is very resistant to sulfide stress cracking and stress corrosion cracking in sour oilfield environments.

Resistant to pitting and crevice corrosion

NS3304 alloy is highly resistant to pitting and crevice corrosion caused by chloride. These forms of corrosion are particularly prone to austenitic stainless steels. form of corrosion. To evaluate the resistance of an alloy to pitting and crevice corrosion, its critical pitting temperature and critical cracking temperature are typically measured in acidified 6 wt.% ferric chloride according to the procedure defined in ASTM Standard G 48. These values ​​represent the lowest temperatures at which pitting and crevice corrosion are encountered in this solution, within 72 hours. For comparison, the values ​​for 316L, 254SMO, 625 and NS3304 (C-276) alloys are as follows:

Other chlorine-containing environments, especially the green dead zone (11.5%H2SO4+1.2%HCl+1%FeCl3+ 1%CuCl2) and yellow dead zone (4%NaCl+0.1%Fe2(SO4)3+0.021MHCl), have been used to compare the resistance of various alloys to pitting and crack corrosion (using 24 hours of testing). In the green dead zone, the lowest temperature at which pitting corrosion is observed in NS3304 (C-276) alloy is the boiling point. In the yellow dead zone, NS3304 (C-276) alloy showed no pitting corrosion even at the highest test temperature (150°C). The critical gap temperature of NS3304 (C-276) alloy in the yellow dead zone is 60°C.

As shown in the picture is the "wind-solar hybrid street light" system, which generates electricity through solar panels when there is sunshine, and through wind turbines when there is wind, and converts the electricity

(1) Wind energy can be obtained continuously in nature. Wind energy is an inexhaustible energy source, so wind energy is a renewable resource;

(2) ①Fan blade material Light weight, high strength, wear resistance, low density, high hardness, which can reduce resistance, extend service life, facilitate installation, etc.;

②As shown in Figure B, the top of the blade is a protruding arc , the bottom is a flat surface, when the air flows through, the air flow speed above is greater than the air flow speed below, the pressure above is smaller than the pressure below, and the blades are subject to upward force;

(3) From Figure C, we know,

A. When the wind is very small or very strong, electric energy cannot be generated, This option is incorrect and does not conform to the meaning of the question;

B. The wind speed is too high and the unit will not generate electricity. This option is incorrect and does not conform to the meaning of the question;

C. The wind speed is Within a certain range, the electric power generated by the unit may remain unchanged. This option is correct and conforms to the meaning of the question;

(4)) ① From the table data, it is known that when the wind speed increases by 2 times, the wind energy increases by 23 times the original, the wind speed increases to 3 times, and the wind energy increases to 33 times..., so the energy obtained by the fan is proportional to the cube of the wind speed;

② According to the question, W is obtained Total=10000J,

By P=

η=

So the answer is: (1) Renewable; (2) Small; Upper; (3) C; (4) ①The energy obtained by the wind turbine is proportional to the cube of the wind speed; ②15%.

(1) The solar energy conversion efficiency is 15%, so 36W=240W/m2×15%×S,

The area of ​​the solar panel is solved:

S=

(2) By battery capacity Know:

W=UIt=12V×500A×3600s×(90%-20%)=1.512×107J,

∵P=

∴ time required:

t=

So the answer is: 1; 84.