Crucible Steel Aquamet® 18 Stainless Steel

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Crucible Steel Aquamet® 18 Stainless Steel
Categories:	Metal; Ferrous Metal; Austenitic; Stainless Steel
Material Notes:	AQUAMET 18 is an austenitic stainless steel with corrosion resistance comparable to that of Type 304. Its good strength and toughness make it an ideal shafting material for workboats. It provides a stainless alternative to ABS Grade 2 carbon steel shafting, but requires no sleeves nor fiberglass. In certain large diameters, it does offer a strength advantage over AQUAMET 19. It is frequently used on pusher tugs, tow boats, supply boats and fishing trawlers. Information provided by Crucible Specialty Metals.
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Mechanical Properties	Original Value	Comments

Tensile Strength, Ultimate	90000 psi @Thickness 203 - 305 mm
	120000 psi @Thickness <=44.5 mm
Tensile Strength, Yield	50000 psi @Strain 0.2 %, Thickness 203 - 305 mm	Tension
	90000 psi @Strain 0.2 %, Thickness <=44.5 mm	Tension
Elongation at Break	35 %	in 2"; 8" to 12"
	20 % @Thickness <=44.5 mm	in 2"
Reduction of Area	45 % @Thickness 203 - 305 mm
	50 % @Thickness <=44.5 mm
Shear Strength	33000 psi @Strain 0.2 %, Thickness 203 - 305 mm
	60000 psi @Strain 0.2 %, Thickness <=44.5 mm

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.15 %
Chromium, Cr	16.5 - 19 %
Iron, Fe	>= 62.81 %	As Remainder
Manganese, Mn	11 - 14 %
Nickel, Ni	0.50 - 2.5 %
Nitrogen, N	0.20 - 0.45 %
Phosphorus, P	<= 0.060 %
Silicon, Si	<= 1.0 %
Sulfur, S	<= 0.030 %

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NCRUC029 / 16022

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