[ Materials ]
[ Materials ]
N ' GENIUS™ CAST ALLOY COMPARISON TO 6Mo CAST GRADES
Alloy Type * |
Tensile Strength ( min ) |
Yield Strength ( min ) |
PRE N
( min )
|
CPT ** ( Typical ) |
CCT ** ( Typical ) |
|
ksi |
MPa |
ksi |
MPa |
|
° C |
° C |
NꞌGENIUS™ 326L35M4N |
94 |
650 |
48 |
330 |
˃45 |
80 |
50 |
CK3MCUN |
80 |
550 |
38 |
260 |
˃42 |
45 |
25 |
CN3MN |
80 |
550 |
38 |
260 |
˃42.5 |
50 |
30 |
* ALL CAST MATERIALS SOLUTION HEAT TREATED AND WATER QUENCHED ACCORDING TO ASTM INTERNATIONAL STANDARDS ** ASTM G48 TEST
Table : Cast N ’ GENIUS 326L35M4N has vastly improved strength and corrosion resistance to cast 6Mo
Among the company ’ s cast offerings , Furniss & White manufactures components for a range of valve types , including globe , control , choke , ball , butterfly and through conduit gate valves . These can now be provided in various grades of the N ’ GENIUS Series , with one alloy in particular proving to be an ideal cast alternative to 6Mo alloys .
The new challenger to cast 6Mo Containing less molybdenum and a higher level of nitrogen than 6Mo , the chemical composition of N ’ GENIUS 326L35M4N has been carefully selected to optimise castability and performance . The result is an alloy that possesses significantly higher mechanical strength properties and far superior resistance to pitting and crevice corrosion . The strength properties , pitting resistance equivalent number ( PREN ), critical pitting temperature ( CPT ) and critical crevice temperature ( CCT ) of N ’ GENIUS 326L35M4N is shown in the Table , along with that of CK3MCuN and CN3MN for comparison . As with all grades from the N ’ GENIUS Series , 326L35M4N can be manufactured in a vast array of cast and wrought product forms allowing all the various components of piping systems including valves , pumps , filters , pipes , fittings and flanges to be specified in the same material . Compared to 6Mo grades , the improved mechanical properties of N ’ GENIUS 326L35M4N will allow some of these products to be designed with a reduced wall thickness , giving engineers the opportunity to make significant weight savings on piping system projects . Alternatively , for those components in which wall thickness is difficult to reduce – including cast valve bodies – these can simply be designed with a higher degree of safety . Weight savings are particularly important for subsea and offshore structures where piping systems tend to be heavy and difficult to handle .
By utilising products manufactured in N ’ GENIUS 326L35M4N these structures could become lighter , making the installation and construction easier and reducing project costs . Valves are fundamental to any piping system and choosing the right material for these components gives the best chance of it being a safe , durable and easy to maintain structure . With the availability of N ’ GENIUS , those prospects have now improved even further .
About the author
A former broadcast journalist , Philip Roscoe is Communications officer at N ’ GENIUS Materials Technology . The UK-based company specialises in the invention of next-generation stainless steels .