Stainless steel
S31803, commonly known as Duplex 2205, is a duplex stainless steel that combines both austenitic and ferritic properties, offering excellent strength and corrosion resistance. It is particularly effective against pitting, crevice corrosion, and stress corrosion cracking in chloride-rich environments. With balanced chromium, molybdenum, and nitrogen content, S31803 is widely used in applications like oil and gas, chemical processing, and marine industries, where durability and resistance to harsh conditions are required.
| Element | Cr | Ni | Mo | N | Mn | Si | C | P | S | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| Content | 21-23% | 4.5-6.5% | 2.5-3.5% | 0.08-0.20% | ≤ 2.0% | ≤ 1.0% | ≤ 0.03% | ≤ 0.03% | ≤ 0.02% | Balance |
| Mechanical Property | Yield Strength | Tensile Strength | Elongation | Hardness |
|---|---|---|---|---|
| Value | ≥ 450 MPa (65 ksi) | ≥ 620 MPa (90 ksi) | ≥ 25% | ≤ 30 HRC |
| Standard/Region | ASTM | ASME | EN | ISO | JIS (Japan) | GB (China) |
|---|---|---|---|---|---|---|
| Grade | A 240 / UNS S31803 | SA-240 / UNS S31803 | 1.4462 | 31803 | SUS 329J3L | 022Cr23Ni5Mo3N |
Product Description:
| Standards: | ASTM A312, GB,ASTM,ASME,EN,JIS,DIN,BS,ISO |
| Grade : | 200series: 201J1,J2,J3,J4 202, 202cu, 204;
300series: 301, 302, 303, 304, 314,304L, 309, 309s, 310, 310S, 316, 316L, 316Ti, 317L, 321, 347; 400series: 409, 409L, 410, 410S,420, 430, 431, 440A,440B, 440C; Others: 330, 660, 630, 631, 17-4ph, 17-7ph, S31803 ,904L, etc. Duplex : (S31803, S22053, S25073, S22253, S32205, S32304; 2205, 2507) And others etc… |
| Surface: | HairLine,Brush,Polished,Pickled Annealed,Bright,&Customized |
| OutDiameter: | 6-1500mm |
| Thickness: | 0.3-20mm |
| Length : | 2500mm,3000mm,4000mm,6000mm,12000mm&Customized. |
| Tolerance: | As per standard ISO |
| Shape: | Round,Square,Rectangular |
| End: | BE,PE, Chamfering. |
| Processing: | Welded,EFW,ERW,Seamless,Hollow,Forged. |
| Loading Port: | Shanghai or any port in China. |
| Packing: | Bundled,wooden box , seaworthy packing or Customized. |
| Payment Term: | T/T , LC, Credit Card, other negotiable |
| Trade Terms | EXW, FOB,CFR,CIF,FCA,CPT,DDU etc. |
| MOQ | 1000kgs Customized Products |
| Delivery time | 15-25days based on processing and stocks. |
Type of Stainless Steel:
Stainless steel is divided into austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, and duplex stainless steel according to the structure state.
Austenitic Stainless Steel
stainless steel with an austenitic structure at room temperature. Steel contains Cr≈18%, Ni≈8%-25% and C≈0.1%. Steel has high toughness and plasticity, but low strength.
Martensitic Stainless Steel
A steel whose mechanical properties can be adjusted by heat treatment. It has different strength and toughness at different tempering temperatures.
Duplex Stainless Steel
Austenitic and ferrite each account for about half of the structure. When the C content is low, the Cr content is 18% to 28%, and the Ni content is 3% to 10%. Some steels also contain alloying elements such as Mo, Cu, Si, Nb, Ti, and N. This type of steel has the characteristics of austenitic and ferritic stainless steel
Ferritic Stainless Steel
It contains 15% to 30% chromium and has a body-centered cubic crystal structure. This type of steel generally does not contain nickel, and sometimes contains a small amount of Mo, Ti, Nb and other elements. This type of steel has the characteristics of large thermal conductivity, small expansion coefficient, good oxidation resistance, and excellent stress corrosion resistance.
| Austenitic Stainless Steel | 201, 301, 304, 305, 310, 314, 316, 321, 347, 370, etc |
| Martensitic Stainless Steel | 410, 414, 416, 416, 420, 431, 440A, 440B, 440C, etc |
| Duplex Stainless Steel | S31803, S32101, S32205, S32304, S32750, etc |
| Ferritic Stainless Steel | 429, 430, 433, 434, 435, 436, 439, etc |
Chemical Composition of come common Duplex stainless steel
Product Presentation:
Packing:
Application:
Stainless steel are widely used across various industries and fields due to their excellent corrosion resistance, strength, workability, and aesthetic appeal. Below are the main uses of stainless steel profiles:
1. Construction and Structural Applications
2. Industrial and Mechanical Manufacturing
3. Automotive and Transportation
4. Medical Equipment and Food Processing
5. Household and Consumer Products
6. Energy and Power
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