From：net Date：2008-12-26
The duplex stainless steel pipe fittings both 304 and austenitic stainless steel pipe fitting product performance characteristics. Duplex stainless steel pipe fittings and 304,316L as the main material stainless steel pipe fittings product comparison, draw the following point of difference:
A, double phase stainless steel pipe has excellent resistance to stress corrosion cracking, especially in the environment of the chlorine ion, even a higher resistance to stress corrosion cracking ability of duplex stainless steel tube containing alloy the amount of the lowest than the austenitic stainless steel pipe stress corrosion is a prominent topic of common austenitic stainless steel tubes are difficult to resolve;
B, the most common application in many media, duplex stainless steel pipe corrosion resistance superior to ordinary 316L austenitic stainless steel, while the super duplex stainless steel pipe has a very high corrosion resistance in some media, such as acetic acid, formic acid can even be replaced by high-alloy austenitic stainless steel pipe, and even corrosion resistant alloys;
C, with good resistance to localized corrosion performance, compared with the alloy content of austenitic stainless steel pipe, in view of the duplex stainless steel, high strength and good corrosion resistance, wear-resistant corrosion and corrosion fatigue performance superior to 304 stainless steel pipe fittings.
It can be seen from the above three points, 304,316 L and duplex stainless steel pipe fittings of the respective features of the product, in the selection process of the stainless steel pipe fittings, we need to according to the actual need to buy
A, double phase stainless steel pipe has excellent resistance to stress corrosion cracking, especially in the environment of the chlorine ion, even a higher resistance to stress corrosion cracking ability of duplex stainless steel tube containing alloy the amount of the lowest than the austenitic stainless steel pipe stress corrosion is a prominent topic of common austenitic stainless steel tubes are difficult to resolve;
B, the most common application in many media, duplex stainless steel pipe corrosion resistance superior to ordinary 316L austenitic stainless steel, while the super duplex stainless steel pipe has a very high corrosion resistance in some media, such as acetic acid, formic acid can even be replaced by high-alloy austenitic stainless steel pipe, and even corrosion resistant alloys;
C, with good resistance to localized corrosion performance, compared with the alloy content of austenitic stainless steel pipe, in view of the duplex stainless steel, high strength and good corrosion resistance, wear-resistant corrosion and corrosion fatigue performance superior to 304 stainless steel pipe fittings.
It can be seen from the above three points, 304,316 L and duplex stainless steel pipe fittings of the respective features of the product, in the selection process of the stainless steel pipe fittings, we need to according to the actual need to buy
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