High Strength Nitronic Alloys Strip With Excellent Corrosion Resistance

High Strength And Good Corrosion Resistant Nitronic 50 Alloy Strip

In addition to the improved corrosion resistance, NITRONIC 50 can be welded successfully using conventional welding processes that are normally employed with the austenitic stainless steels, As with most stainless steels, good weld joint properties can be obtained without the necessity of preheat or postweld annealing. The matching weld filler (NITRONIC 50 AWS E/ER 209) for Armco NITRONIC 50 Stainless Steel is similar to many of the regular austenitic stainless steel filler metals in that a small percentage of magnetic ferrite phase has been introduced to as sure sound weld deposits. If the strength levels or superior corrosion resistance in the weld deposits are not required, other filler metals can be used to advantage because of reduced costs and/or ready availability. The small quantity of the second phase usually produces a magnetic permeability value of approximately 1.2 in shielded metal-arc weld deposits. This corresponds to a ferrite number (FN) of approximately 6. Highly overalloyed Ni base fillers are suggested for applications requiring high resistance to pitting media or very low asdeposited magnetic permeability.

Gas tungsten arc weld joints have been fused successfully in several fiat-rolled gauges of Armco NITRONIC 50 GTA Weld Joints (Cont.) Stainless Steel. Mechanical property values similar to those of the base metal have been obtained in the as-welded condition. The corrosion resistance of GTA welded joints has been evaluated using the standard Huey test (ASTM A 262, Practice C) for detecting intergranular attack in stainless steels. Laboratory test experience shows that welds made using the NITRONIC 50W Stainless Steel filler metal exhibit the same resistance to intergranular attack as the base metal.

Nitronic 50 Chemical composition:

Nitronic 50 Physical properties

Nitronic 50 Characteristic:

Nitronic 50 Stainless Steel provides a combination of corrosion resistance and strength not found in any other commercial material. This austenitic stainless steel has corrosion resistance greater than that provided by types 316, 316L, 317, 317L plus approximately twice the yield strength at room temperature. In addition, Nitronic 50 has very good mechanical properties at both elevated and sub-zero temperatures unlike many austenitic stainless steel grades.

Nitronic 50 does not become magnetic in cryogenic situations.

High Strength (HS) Nitronic 50 has a yield strength about three times that of 316 Stainless Steel.

Nitronic 50 Application field:

Used in petroleum, petrochemical, manure, chemical, nuclear fuel recycle, paper making, textile and food processing industries parts of furnace, combustion chamber, gas turbine and heat-treating facility connecting piece