WUXI XINFUTIAN METAL PRODUCTS CO., LTD
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2205 Duplex Astm A182 316 SS Rod Stainless Steel Bar High Strength Good Weldability
Duplex Stainless Steel
High Strength - Duplex stainless steel has much higher tensile strength and yield strength compared to conventional stainless steel, typically reaching 500-800 MPa. This allows the use of thinner materials in many structural applications, reducing the overall weight.
Excellent Corrosion Resistance - Duplex stainless steel contains a dual-phase microstructure of austenite and ferrite. This biphasic structure gives it outstanding corrosion resistance, making it widely used in marine, chemical, and oil & gas environments.
Superior Resistance to Stress Corrosion Cracking - Duplex stainless steel has very strong resistance to stress corrosion cracking, which is critical for applications such as pipelines and vessels under stress.
Good Weldability - Compared to standard austenitic stainless steels, duplex stainless steel has better weldability, facilitating fabrication and manufacturing.
Lower Cost - Due to the lower nickel content, the manufacturing cost of duplex stainless steel is much lower than austenitic stainless steels of the same grade.
Products Details
Duplex 2205 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades. It also demonstrates good fatigue strength, as well as outstanding resistance to stress corrosion cracking, crevice, pitting, erosion, and general corrosion in severe environments.
Chemical Properties
| C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 2205 (S31803) | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 21.0 max: 23.0 | min: 2.5 max: 3.5 | min: 4.5 max: 6.5 | min: 0.08 max: 0.20 |
| 2205 (S32205) | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 22.0 max: 23.0 | min: 3.0 max: 3.5 | min: 4.5 max: 6.5 | min: 0.14 max: 0.20 |
Mechanical Properties
| Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (HB) MAX |
| 2205 | 90 | 65 | 25 | 217 |
Corrosion Resitance
1. Due to its high chromium, molybdenum, and nitrogen content, Duplex 2205 demonstrates superior corrosion resistant properties to 316 and 316L in most environments
2. Chromium, molybdenum, and nitrogen content also provide high resistance to pitting and crevice corrosion, even in oxidizing and acidic solutions
3.Resistant to chloride stress corrosion cracking and temperatures of up to about 302°F (150°C)
4. The presence of ferrite provides for good performance of Duplex 2205 in caustic environments
Heat Resitance
1.Similar to other duplex stainless steels, Duplex 2205 has good oxidation resistance at high temperatures
2. Subject to embrittlement when exposed to temperatures above 572°F (300°C) even when exposed for short periods of time; Duplex 2205 is therefore not recommended for use above 572°F (300°C)
Process
Welding Characteristics
A. Possesses good weldability
B. Should not generally be welded without filler metal as this may result in excessive ferrite
Heat-Treatment
A. Annealing temperature range is 1868 to 2012°F (1020 to 1100°C)
B. Cannot be hardened by heat treatment – but Duplex 2205 does work-harden
C.Special consideration is needed to compensate for a higher coefficient of thermal expansion to avoid warping and distortion
Process -hot forming
Most Duplex 2205 producers recommend a maximum hot forming temperature between 2010 and 2100°F (1100 to 1150°C). If the shape of the work piece is not compact, the edges may be significantly cooler than the bulk, and there is risk of cracking in the cooler regions.
Process -Cold Forming
Duplex 2205 has shown good formability in a variety of fabrications. The high strength of Duplex 2205 can pose problems. Even when the equipment has sufficient power, allowance must be made for higher spring-back caused by the grade’s high strength.
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WUXI XINFUTIAN METAL PRODUCTS CO.,LTD is a professional company for Stainless steel products production, processing and sales which has experienced over ten years of development. We are located in WUXI, close to Shanghai (BAO STEEL),Zhangjiagang (ZPSS),Ningbo (BAO XIN),enjoying excellent geographic location and convenient water, land and air transportation.
The company has modern professional metal processing machines of which the 90% are imported from Japan and Germany. Such as Water Jet machine,Cold/Hot Rolled production line,laser cutting machine,hailrine machine which can provide cutting ,slitting ,polished ,OEM and ODM service for our clients.
Our company presist to the spirit of "Integrity,Pragmatic,High quality,First-class”, providing customers with the most satisfactory service .
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