| 材料等级： | S32205 | 标准： | ASTM A790 |
|---|---|---|---|
| 无损检测： | ET， UT， HT ， PT | 尺寸 | 1/2” To 18” |
| W.T.： | 0.3mm To 50mm | 长度 | Single Random Length/ Double Random Length Or As Customer’s Actual Request |
| 包装 | 胶合木箱/铁箱/捆包 | 申请： | Piping/ Heat Exchangers/Food Processing Equipment |
Duplex Stainless Steel Pipe ASTM A790 UNS S32205 Reactors Tanks
What is UNS S32205?
S32205 is a modern duplex stainless steel material combining austenitic and ferritic materials. It is known for its extremely high strength and resistance to stress corrosion cracking. These trademarks are approximately twice as strong as the austenitic and ferritic trademarks. It has better resistance and ductility than ferritic steels， but not up to the level of austenitic steels. Heat treatment is easy， but cold forming is difficult. Duplex (austenitic/ferritic) steel (Type 2205) containing 22% chromium has medium to high strength and superior resistance to general corrosion/stress， corrosion/cracking. It is generally used to make chemical processing equipment， pressure vessels and heat exchanger components. The alloy is resistant to chloride environments and chemical stress corrosion， and is approximately twice as strong as standard austenitic stainless steels. Requirements for higher mechanical strength / lighter weight， the alloy can be successfully used as a 300 series austenitic stainless steel replacement. s32205 easy to use many standard arc welding equipment for welding， but not recommended for oxyethylene block welding， due to the weld metal may present the phenomenon of carbonization. s32205 application planning application areas are: typical applications include oil and gas， chemical， electric power， and brewing industry. Widely used pumps， valves， flanges and piping systems. Martensitic stainless steel trademark is a group of corrosion-resistant and hardenable (using heat treatment) stainless steel alloys. Martensitic grades are pure chromium steels without nickel. They are magnetic， can be hardened by heat treatment， and are not as corrosion resistant as austenitic stainless steels. Martensitic grades are used primarily where hardness， strength and wear resistance are required.
化学成分 of ASTM A790 UNS S32205
| 要素 | 成分， % |
|---|---|
| TypeC | 2205 |
| 碳 | 最大 0.030 |
| 锰 | 最多 2.00 |
| 磷 | 最大 0.030 |
| 硫磺 | 最大 0.020 |
| 硅 | 最大 1.00 |
| 镍 | 4.50 – 6.50 |
| 铬 | 22.00 – 23.0 |
| 钼 | 3.0 – 3.5 |
| 氮 | 0.14 – 0.20 |
物理特性 of ASTM A790 UNS S32205
| 等级 | 密度 （千克/立方米） | 弹性 模量（GPa） | 平均热导系数 膨胀率（μm/m/°C） | 热能 电导率（瓦/米.K） | 具体内容 热量 0-100°C ( 焦耳/千克.K) | 电气 电阻率 (nΩ.m) | |||
| 0-100°C | 0-315°C | 0-538°C | 100°C 时 | 在 500°C 时 | |||||
| 标准 S32205 / 2205 | 782 | 190 | 13.7 | 14.2 | – | 19 | – | 418 | 850 |
Mechanical Composition of ASTM A790 UNS S32205
| 等级 | 拉伸强度 (MPa) 最小值 | 屈服强度 0.2% 证明 (MPa) 最小值 | 伸长率 (%，50 毫米） 最小值 | 硬度 | |
| 罗克韦尔 C (HR C) | 布氏硬度 (HB) | ||||
| 标准 S32205 / 2205 | 621 | 448 | 25 | 31 最大值 | 最大 293 |
ASTM A790 UNS S32205 Heat Treatment
| 过程 | 价值 |
|---|---|
| Annealing Temperature °F [°C] | 1870 – 2010 [1020 – 1100] |
| Quenching | Rapid Cooling in Air or Water |
Heat Resistance of ASTM A790 UNS S32205
The high oxidation resistance property of Grade 2205 is marred by its embrittlement above 300°C. This embrittlement can be modified by a full solution annealing treatment. This grade performs well at temperatures below 300°C.
双相不锈钢管应用：
- 化学加工，运输和储存
- 石油和天然气勘探及近海钻机
- 海洋环境
- Architectural and structural engineering
- Medical equipment
- Papermaking equipment
- Sewage treatment equipment
