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10 Maritime Reporter/Engineering News Our two ship cutaways illustrate the economic advantage of Armco CRYONIC 5 Steel. Regardless of design, for about the same ma- terial cost of four 9% nickel steel tanks, you can get five tanks of CRYONIC 5 steel. A bonus in cargo capacity. Or, in other terms, any tank built with CRYONIC 5 will reduce material cost about 20%. In addition, this 5% nickel alloy steel has essentially the same strength and toughness as higher alloyed 9% nickel steel. In fact, no design changes are required in switching from 9% nickel tanks to Armco CRYONIC 5. The allowable design stress is the same for both steels (ASME, API). Because of this performance capability, and CRYONIC 5 steel's major price advantage, we think it will become the standard ma- terial for liquid ethylene and methane (LNG) service. Comparison of Charpy V-Notch Toughness CRYONIC 5, 9% Nickel and Aluminum L-Longitudinal T-Transverse I 5 L and T C 9% NICKEL-L 9% NICKEL-T -300 -200 -100 0 TEST TEMPERATURE, °F 5083-0 ALUMINU T
