1.4541 stainless steel is a titanium stabilized grade commonly used in the 1000-1600 ° F temperature range. For operating temperatures up to approximately 1600 ° F, air cooling stabilization treatment of 1550-1650 ° F can be used to provide optimal resistance to intergranular corrosion and stress corrosion cracking in polythiocyanate.
1.4541 stainless steel can be welded by all common methods, including submerged arc welding. Suitable welding filler materials are AWS ER347 bare wire and E347 electrode. The machinability of 321 stainless steel is similar to that of 304 stainless steel. Compared to AISI B1112, its machinability level is 45%.
Formation of Ferritic Phase: Effect on the Properties of Austenitic Stainless Steel. The appearance of F-phase generally has adverse effects on the properties of austenitic stainless steel: for example, it increases the tendency for cracks to occur during hot working; The pitting corrosion resistance of steel decreases and its corrosion resistance deteriorates in many corrosive environments, such as urea production; When heated for a longer time at high temperatures, the F phase will change to σ Phase makes steel brittle, etc.
Rough determination of content
Creq=%Cr+1.5 ×% Si+%Mo，Nieq=%Ni+30 × (%C+%N)+0.5 ×% Mn
Elimination of ferrite phase
The fundamental solution is to increase the content of austenite forming elements in steel. Ni is the preferred element, but from an economic perspective, Mn and N are also receiving attention. Especially N, its ability to inhibit the formation of ferrite is 30 times that of Ni, while also improving corrosion resistance and strength
Common Trade Names
321321 stainless steel, 321 alloy
Specifications
AMS 5510, AMS 5645, ASME SA 240, ASME SA 312, ASME SA 479, ASTM A 240, ASTM A 276, ASTM A 276 Condition A, ASTM A 276 Condition S, ASTM A 312, ASTM A 479, EN 1.4541, QQS 763, QQS 766d, UNS S32100, Werkstoff 1.4541
features
Resistance to oxidation at 1600 ° F
Stable welding heat affected zone (HAZ) intergranular corrosion
Resistance to polysulfuric acid stress corrosion cracking
Application
Aircraft piston engine manifold
expansion joint
Gun production
Thermal oxidant
Refinery equipment
High temperature chemical process equipment