There are significant differences between duplex stainless steel wire mesh 2205 and 2207 in many aspects. The following is a detailed analysis and summary of their differences:
Chemical composition and element content:
2205 duplex stainless steel: mainly composed of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. In addition, it also contains a certain amount of nitrogen (0.14~0.20%), as well as small amounts of elements such as carbon, manganese, silicon, phosphorus and sulfur.
2207 Duplex Stainless Steel (also known as F53): Also contains 21% chromium, but has higher molybdenum and nickel content than 2205. The specific content may vary slightly due to different standards or manufacturers, but generally the molybdenum content is higher and the nickel content is also relatively high.
Performance features:
2205 duplex stainless steel:
Has high strength and good impact toughness.
It has good overall and local resistance to stress corrosion.
Due to the high content of chromium, molybdenum and nitrogen in its chemical composition, it has a high anti-pitting corrosion equivalent (PREN value 33-34). In almost all corrosive media, its pitting corrosion resistance and crevice corrosion resistance are better than 316L Or 317L austenitic stainless steel.
2207 duplex stainless steel:
It has better corrosion resistance and wear resistance, especially against corrosive media such as strong acids, alkalis and chloride ions.
It has higher strength and hardness and is more durable than ordinary stainless steel.
It has good plasticity and processability, as well as excellent toughness and fatigue resistance.
Application areas:
2205 duplex stainless steel: widely used in chemical industry, oil and gas industry, marine engineering, construction industry, aerospace industry and other fields. Its excellent corrosion resistance makes it an ideal choice for the manufacturing of ships, offshore platforms and other equipment.
2207 duplex stainless steel: also suitable for highly corrosive environments, especially in harsh environments such as marine engineering and chemical industry. Due to its unique performance characteristics, it is also widely used in fields such as oil and gas drilling.
Welding performance and cost:
2205 duplex stainless steel has good weldability. It does not require preheating during welding or heat treatment after welding, which simplifies the welding process.
In contrast, the welding performance of 2207 duplex stainless steel is relatively poor and requires special welding processes. In addition, due to its excellent performance, the price of 2207 duplex stainless steel is relatively high and the manufacturing cost is high.