1.Introduction

alloy offering outstanding corrosion-resistance in a range of severe environments. Its

high nickel (Ni) and molybdenum (Mo) provide good resistance in reducing conditions,

and high chromium (Cr) offers resistance to oxidizing media. Molybdenum (Mo) and

tungsten (W) aid resistance to localized corrosion such as pitting. Iron (Fe) is closely

controlled to enhance properties. Low carbon (C) helps minimize grain boundary

precipitation to maintain corrosion-resistance in the heat-affected zones of welded

joints. Resistance to general, pitting and crevice corrosion increases with the alloying

2.Chemical composition

3.Physical properties

Density, lb/in3 .....................................................................0.315 

             g/cm3 ......................................................................8.73 

Melting Range, °F .....................................................2440-2516 

                         °C .....................................................1338-1380

Electrical Resistivity, ohm•circ mil/ft .................................744.4

Permeability at 200 oersted (15.9 kA/m).........................1.0001