The Difference Between Stainless Steel 2507 And 2205
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The difference between stainless steel 2507 and 2205
2205
Material grade: 2205 duplex steel
US grade: UNS S31803
German brand: 1.4462
Chinese brand: 00Cr22Ni5Mo3N, F51
1. Overview of 2205 (S31803, F51, 1.4462) duplex stainless steel:
2205 (S31803, F51, 1.4462) duplex steel is a new product successfully researched and developed in 2000. 2205 duplex steel is a nitrogen-added duplex stainless steel (referred to as 2205 duplex steel). 2205 duplex steel is composed of 21% Duplex stainless steel composed of chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. At present, domestic 2205 dual-phase steel product types include welded pipes, seamless pipes, steel plates, bars, forged materials, strips, etc. Early duplex stainless steels were resistant to moderate uniform corrosion and chlorine stress corrosion cracking, but their properties were significantly reduced when used in welding situations. In order to improve this situation, nitrogen is added to 2205 dual-phase steel, which not only improves the corrosion resistance, but also makes the welding condition very good. It has high strength, good impact toughness and good overall and local resistance to stress corrosion.
The yield strength of Shanghai Bingzheng Industrial 2205 dual-phase steel is twice that of austenitic stainless steel. This feature allows designers to reduce weight when designing products, making this alloy more price advantageous than 316 and 317L. This alloy is particularly suitable for use in the -50°F/+600°F temperature range. For applications outside this temperature range, this alloy can also be considered, but there are some limitations, especially when used in welded structures. Due to the special performance characteristics of 2205 dual-phase steel, it has a wide range of applications. It is currently the most widely used grade among duplex steels.
3. Physical and mechanical properties of 2205 (S31803, F51, 1.4462) duplex stainless steel:
1. 2205 (S31803, F51, 1.4462) dual-phase steel density: 8.0g/cm3.
2. 2205 (S31803, F51, 1.4462) dual-phase steel tensile strength: σb≥620Mpa.
3. 2205 (S31803, F51, 1.4462) dual-phase steel yield strength: σ0.2≥450Mpa
4. 22205 (S31803, F51, 1.4462) dual-phase steel elongation: δ ≥ 25%.
4. Corrosion resistance of 2205 (S31803, F51, 1.4462) duplex stainless steel:
1. Uniform corrosion: Due to the chromium (22%), molybdenum (3%) and nitrogen content (0.18%) of 2205 dual-phase steel, the corrosion resistance of 2205 is better than 316L and 317L in most environments.
2. Local corrosion resistance: The content of chromium, molybdenum and nitrogen in 2205 dual-phase steel makes it highly resistant to pitting corrosion and crevice corrosion in oxidizing and acidic solutions.
3. Resistance to stress corrosion: The dual-phase microstructure of 2205 dual-phase steel helps improve the resistance of stainless steel to stress corrosion cracking. Under certain conditions of temperature, stress, oxygen and chloride, austenitic stainless steel will undergo chloride stress corrosion. Since these conditions are not easily controlled, the use of 304L, 316L and 317L is limited in this regard.
4. Anti-corrosion fatigue: The high strength and corrosion resistance of 2205 dual-phase steel make it have high anti-corrosion fatigue strength. Processing equipment is susceptible to corrosive environments and loading cycles, and the characteristics of 2205 are well suited for such applications.
