317 Stainless Steel

Stainless steels are known as high alloy steels.

317 stainless steel. What separates 316 and 317 ss from 304 ss is that these higher numbered alloys have added molybdenum in their. Grade 304 stainless steel is generally regarded as the most common austenitic stainless steel. Alloy 317l uns s31703 is a lowcarbon corrosion resistant austenitic chromium nickel molybdenum stainless steel. In our plant we deal with a corrosive fatty acid liquid.

Minimum mechanical properties for annealed types 316 316l 317 and 317l austenitic stainless steel plate sheet and strip as required by astm specifications a240 and asme specification sa 240 are shown below. Is 317 more corrosion resistant than 316. They are classified into martensitic austenitic and ferritic steels based on their crystalline structure. These alloys all share some similar properties such as high strength corrosion resistance and high concentrations of chromium and nickel.

Alloy 317l is a molybdenum containing low carbon austenitic stainless steel with increased additions of chromium nickel and molybdenum for better corrosion resistance and increased resistance to chemical attack for sulfurous acetic formic citric and tartaric acids. 317 317l stainless steel bar uns s31700 s31703 dual certified 317 stainless steel also known as uns s31700 and grade 317 is primarily comprised of 18 to 20 chromium and 11 to 15 nickel along with trace amounts of carbon phosphorus sulfur silicon and balanced with iron. Grade 317 stainless steel is a modified version of 316 stainless steel. They consist about 4 30 of chromium.

Grade 304 316 and 317 stainless steel are all considered austenitic stainless steel alloys. Other major alloying elements include manganese silicon and carbon. It has high strength and corrosion resistance. 3 different types of stainless steel include the elements carbon from 0 03 to greater than 1 00 nitrogen aluminium silicon sulfur titanium nickel copper selenium niobium.

Minimum room temperature mechanical properties astm a240 and a666 specifications. Temperature range c f j kg k btu lb f. It contains high nickel content that is typically between 8 and 10 5 percent by weight and a high amount of chromium at approximately 18 to 20 percent by weight. In the early days of the plant the pipe specs for this material called for 316 stainless steel but now it calls for 317 stainless steel.

3 a composition that prevents the iron from rusting as well as providing heat resistant properties. 276 is a group of iron based alloys that contain a minimum of approximately 11 chromium. 317l is a molybdenum containing austenitic stainless steel with improved corrosion resistance over 304 304l and 316 316l stainless steel.