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 steel alternative to ABS Grade 2 carbon steel shafting, but requires no sleeves or fiberglass. In certain large diameters, it offers a strength advantage over AQUAMET 19. It is currently used on pusher tugs, towboats, supply boats and fishing trawlers.
Mechanical Properties
|
AQUAMET 18 |
Tensile Strength Psi |
0.2% Yield Tension psi |
Strength Torsion psi |
Elongation |
Reduction of Area % |
|
Up to 1¾" |
120,000 |
90,000 |
60,000 |
20 |
50 |
|
Over 1¾" |
110,000 |
70,000 |
47,000 |
35 |
55 |
|
Over 2½" |
105,000 |
65,000 |
43,000 |
40 |
55 |
|
Over 5" |
100,000 |
60,000 |
40,000 |
40 |
55 |
|
Over 8" |
90,000 |
50,000 |
33,000 |
35 |
45 |
Minimum values. Actual test results may be higher.
Chemical Properties
|
COMPOSITION |
18 |
|
Carbon |
0.15 max |
|
Manganese |
11.00 - 14.00 |
|
Silicon |
1.00 max |
|
Chromium |
16.50 - 19.00 |
|
Nickel |
0.50 - 2.50 |
|
Phosphorus |
0.06 max |
|
Sulfur |
0.03 max |
|
Nitrogen |
0.20 - 0.45 |
|
Iron |
Balance |
Marine Machining & Manufacturing
Marine Alloys
33475 Giftos Drive
Clinton Township, MI 48035
(586) 791-8800
FAX: (586) 791-8803
marinemachining@sbcglobal.net
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