product advantages

1. Compared with austenitic stainless steel, the advantages of duplex stainless steel are as follows:
(1) The yield strength is more than double that of ordinary austenitic stainless steel, and it has sufficient plasticity and toughness required for forming. The wall thickness of storage tanks or pressure vessels made of duplex stainless steel is 30-50% less than that of commonly used austenite, which is beneficial to reduce costs.
(2) It has excellent resistance to stress corrosion cracking. Even duplex stainless steel with the lowest alloy content has higher resistance to stress corrosion cracking than austenitic stainless steel, especially in environments containing chloride ions. Stress corrosion is an outstanding problem that is difficult to solve for ordinary austenitic stainless steel.
(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 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 equivalent alloy content, its wear resistance and fatigue corrosion resistance are better than austenitic stainless steel.
(5) The coefficient of linear expansion is lower than that of austenitic stainless steel, which is close to that of carbon steel. It is suitable for connection with carbon steel and has important engineering significance, such as the production of composite plates or linings.
(6) No matter under the condition of dynamic load or static load, it has higher energy absorption capacity than austenitic stainless steel, which has obvious advantages and practical application value for structural parts to deal with unexpected accidents such as collision and explosion. .
2. Compared with ferritic stainless steel, the advantages of duplex stainless steel are as follows:
(1) The comprehensive mechanical properties are better than those of ferritic stainless steel, especially the plastic toughness, which is not as sensitive to brittleness as ferritic stainless steel.
(2) In addition to stress corrosion resistance, other local corrosion resistance is better than ferritic stainless steel.
(3) Cold working performance and cold forming performance are far superior to ferritic stainless steel.
(4) The welding performance is also far superior to that of ferritic stainless steel. Generally, no preheating is required before welding, and no heat treatment is required after welding.
(5) The application range is wider than that of ferritic stainless steel.

Duplex stainless steel plate specification