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duplex 2205/ S31803 stainless steel din985 hex nylon insert lock nuts
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Product Details
| Place of Origin | Jiangsu, China | Brand Name | XDO | |
| Model Number | M6-M64,1/4"-2" | Standard | Other, DIN,ANSI,ISO,etc. |
Product Description
Duplex 2205
ASTM A 182, A 240, A 276,
A 789, A 790, A 815
UNS S31803, S32205
NACE MR0175
2205 Duplex Overview
The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy (stress corrosion cracking resistance and high strength) with those of an austenitic alloy (ease of fabrication and corrosion resistance).
Usage of 2205 Duplex stainless steel should be limited to temperatures below 600° F. Extended elevated temperature exposure can embrittle 2205 stainless.
Corrosion Resistance
2205 duplex stainless steel is a cost effective solution for many applications where the 300 series stainless steels are susceptible to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides. Increasing temperatures also increase the susceptibility of stainless steels to stress corrosion cracking.
The combination of chromium, molybdenum and nitrogen convey the good resistance of 2205 to chloride pitting and crevice corrosion. This resistance is extremely important for services such as marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. The high chromium, molybdenum and nitrogen contents of 2205 provide corrosion resistance superior to common stainless steels, such as, 316L and 317L in most environments.
Chemical Composition, %
| Cr | Ni | Mo | C | N |
|---|---|---|---|---|
22.0-23.0 | 4.50-6.50 | 3.00-3.50 | .030 Max | 0.14-0.20 |
Mn | Si | P | S | Fe |
2.00 Max | 1.00 Max | .030 Max | .020 Max | Balance |
In what applications is Duplex 2205 used?
- Chemical process vessels, piping and heat exchangers
- Pulp mill digesters, bleach washers, chip pre-steaming vessels
- Food processing equipment
- Oil field piping and heat exchangers
- Flue gas desulfurization equipment
ASTM Specifications
| Pipe Smls | Pipe Welded | Tube Smls | Tube Welded | Sheet/Plate | Bar | Flanges, Fittings & Valves |
|---|---|---|---|---|---|---|
A790 | A790 | A789 | A789 | A240 | A276 | A182 |
Mechanical Properties
Specified Tensile Properties ASTM A240
Ultimate Tensile Strength, ksi Minimum | .2% Yield Strength, ksi Minimum | Hardness Max. |
|---|---|---|
95 | 65 | 31 Rockwell C |
Contact Us
- Nanjing Xidiou Stainless Steel Co., Ltd.
- Contact nameYuanKai Miao Chat Now
- Phone86-25-86628507
- AddressNo.A320 Yindu building,Shuiximen street,Nanjing,China, Nanjing, Jiangsu
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