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ASTM A789 A790 S31803 / 2205 Duplex Stainless Steel Tube 2205 2507 super stainless steel pipe
Description:
The main alloy elements of duplex steel are Cr, Ni, Mo and N.Among them, Cr and Mo increased the content of ferrite and Ni and N were austenite stable elements.Some types of steel have elements such as Mn, Cu and W.Cr, Ni, Mo can improve corrosion resistance.The resistance to pitting corrosion and crack corrosion is particularly good in the environment containing chloride.
The microstructure of duplex stainless steel is about 50% austenite and 50% ferrite, so the duplex products have the physical properties of ferrite and austenite.
The duplex stainless steel is resistant to cracks caused by
chloride stress corrosion of austenite and has good resistance to
local corrosion.Duplex steel is easy to weld into shape, similar to
the grade of austenite.
According to different contents of chromium, nickel and molybdenum,
duplex stainless steel is divided into four categories: precision,
duplex, superduplex and superduplex.This duplex stainless steel is
about twice as productive as the austenite and can be used to
design thinner tubing.
Higher hardness provides better wear resistance for high precision
tubes.
Two phase stainless steel 2205 standard no. : ASTM A240/ a240m-01
two phase stainless steel 2205 alloy is a composite stainless steel
composed of 22% chromium, 2.5% molybdenum and 4.5% nickel nitrogen
alloy.It has high strength, good impact toughness and good overall
and local resistance to stress corrosion.
Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu | |
| 310S | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 24.00~26.00 | 19.00~22.00 | - | |||
| 316 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 16.00~18.00 | 10.00~14.00 | 2.00~3.00 | |||
| 316L | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 16.00~18.00 | 12.00~15.00 | 2.00~3.00 | |||
| 321 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 17.00~19.00 | 9.00~13.00 | - | |||
| 430 | ≤0.12 | ≤0.75 | ≤1.00 | ≤0.040 | ≤0.03 | 16.00~18.00 | - | - | |||
| 2205 | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.015 | 22.00~23.00 | 4.5~6.5 | 2.5~3.5 | |||
| 2507 | ≤0.03 | ≤0.08 | ≤1.20 | ≤0.035 | ≤0.015 | 24.00~26.00 | 6.00~8.00 | 3.0~5.0 | |||
| 904L | ≤0.02 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.035 | 19.00~23.00 | 23.00~28.00 | 4.0~5.0 | 1.0~2.0 | ||
Product Show
Application
Production of 2205 duplex stainless steel is widely used in: neutral chloride environment oil refining industry, petrochemical and chemical industry, chemical industrial pipelines, oil and gas industry, pulp and paper industry urea fertilizer industry, phosphate fertilizer industry, the water environment, energy and environmental protection industry, light industry and food industry, food and pharmaceutical industry equipment high strength structure
pressure vessels, high pressure storage tanks, high pressure pipelines, heat exchangers (chemical processing industry).
petroleum and natural gas pipeline, heat exchanger pipe fittings.
· sewage treatment system.
· pulp and paper industrial classifier, bleaching equipment, storage and treatment system.
· rotary shaft, press roller, blade, impeller, etc. in high strength and corrosion resistant environment.
· cargo boxes for ships or trucks
· food processing equipment
