Outstanding advantages of duplex stainless steel
Shandong Xinhe International Trade Co., Ltd
2023-02-16
Stainless steel appears frequently in our buildings and lives, but can you tell the difference between stainless steel? Stainless steel is divided into austenitic stainless steel, martensitic stainless steel, ferritic stainless steel, duplex stainless steel and so on. Compared with these stainless steels, the price of duplex stainless steel is relatively more expensive. As the so-called "you get what you pay for", there is a reason why the price of duplex stainless steel is higher. Let us briefly introduce below. Compared with austenitic stainless steel, the advantages of duplex stainless steel are as follows:
①It has good local corrosion resistance. Compared with austenitic stainless steel with equivalent alloy content, due to the high strength and good corrosion resistance of duplex stainless steel, its wear resistance and corrosion fatigue performance are better than those of austenitic stainless steel. Stainless steel.
②The yield strength is more than double that of ordinary austenitic stainless steel, and it has sufficient plasticity and toughness for forming. The wall thickness of storage tanks or pressure vessels made of duplex stainless steel is 30% to 50% less than that of commonly used austenitic stainless steel, which is conducive to reducing costs.
③ The corrosion resistance of 2205 duplex stainless steel, which is the most commonly used in many media, is better than that of ordinary 316L austenitic stainless steel, and super duplex stainless steel has extremely high corrosion resistance. In some media, such as acetic acid, formic acid, etc. It can even replace high-alloy austenitic stainless steel and even corrosion-resistant alloys.
④ It has excellent resistance to stress corrosion cracking, especially in the environment containing chloride ions. Even duplex stainless steel with the lowest alloy content has higher resistance to stress corrosion cracking than austenitic stainless steel. Stress corrosion is common Outstanding problems that are difficult to solve for austenitic stainless steel.
We will stop here with regard to the differences between duplex stainless steels and other stainless steels. I hope to be helpful.
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