The yield strength of 2205 duplex stainless steel is more than twice that of ordinary austenitic stainless steel, which enables designers to reduce the weight when designing products, and also makes this alloy more competitive than 3 16 and 3 17L. This alloy is especially suitable for -50 degrees Fahrenheit /+600 degrees Fahrenheit.
In this temperature range. For applications beyond this temperature range, this alloy can also be considered, but there are some limitations, especially when applied to welded structures.
The dual-phase structure of stainless steel is helpful to improve the stress corrosion cracking resistance of stainless steel. Under the action of certain temperature, strain, oxygen and chloride, chloride stress corrosion will occur in austenitic stainless steel. Because these conditions are not easy to control, the use of 304L, 3 16L, 3 17L is restricted in this respect.
Extended data:
Advantages of 2205 stainless steel:
1, the yield strength is more than twice that of ordinary austenitic stainless steel, and it has enough plastic toughness required for molding. The wall thickness of the storage tank or pressure vessel made of duplex stainless steel is 30-50% less than that of ordinary austenite, which is beneficial to reduce the cost.
2. Excellent stress corrosion cracking resistance. Even duplex stainless steel with the lowest alloy content has higher stress corrosion cracking resistance than austenitic stainless steel, especially in the environment containing chloride ions. Stress corrosion is a prominent problem that ordinary austenitic stainless steel is difficult to solve.
3. The corrosion resistance of 2205 duplex stainless steel, which is widely used in various media, is better than that of ordinary 3 16L austenitic stainless steel, while super duplex stainless steel has extremely high corrosion resistance. In some media, such as acetic acid and formic acid, it can even replace high-alloy austenitic stainless steel and even corrosion-resistant alloys.
4. It has good local corrosion resistance. Compared with austenitic stainless steel with the same alloy content, its wear resistance and fatigue corrosion resistance are better than those of austenitic stainless steel.
Baidu Baike -2205 Stainless Steel