SAE J1781-1987 MATERIALS FOR FLUID SYSTEMS OF MARINE VEHICLES.pdf
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1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER; (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1987 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 INFORMATION REPORT Submitted for recognition as an American Na
4、tional Standard J1781/HIR1694 REAF. MAY87 Issued1982-12 Reaffirmed1987-05 MATERIALS FOR FLUID SYSTEMS OF MARINE VEHICLES ForewordThis Document has not changed other than to put it into the new SAE Technical Standards Board Format. TABLE OF CONTENTS 1.Scope . 1 1.1Purpose 1 1.2Classification 1 2 .Ref
5、erences . 2 3.Marine Environment . 3 4.Corrosion 3 5.Design Guidelines for Metals 9 6.Non-Metallics 12 7.Applications 13 8.Conclusions 15 1.ScopeThe scope of this HIR is to delineate groups of materials for which there is considerable fabrication and operating experience in the sea water environment
6、. In addition, some of the more promising materials for possible future applications are covered. 1.1PurposeThe purpose of this Hydrospace Information Report (HIR) is to define materials for use in fluid systems of marine vehicles, including submersibles and advanced surface craft. This report is mo
7、re particularly directed to the designer of fluid power and piping systems on board marine vehicles. 1.2ClassificationMaterial selection should be based on evaluation of properties as affected by the marine environment. See Table 1. SAE J1781/HIR1694 Reaffirmed MAY87 -2- TABLE 1MATERIAL PROPERTIES I
8、N MARINE ENVIRONMENT 1.Mechanical Properties: Ultimate tensile strength Yield strength Shear strength Cyclic fatigue Modulus of elasticity Density Ductility and fracture toughness Bearing properties Lubrication properties Magnetic properties 2.Susceptibility to Environmental Degradation: Uniform sur
9、face corrosion Pitting and crevice corrosion Galvanic corrosion Stress corrosion cracking Corrosion fatigue Erosion and cavitation Hydrogen embrittlement Fretting fatigue Galling and wear Selective phase attack Fluid compatibility Biodeterioration 3.Acquisition and Maintenance Cost Factors: Raw mate
10、rial cost and availability Fabricability: forming distortion under heat treatment joining machining surface finishes Inspectability Repairability SAE J1781/HIR1694 Reaffirmed MAY87 -3- 2.References 2.1Applicable PublicationsThe following publications form a part of the specification to the extent sp
11、ecified herein. Unless otherwise indicated the latest revision of SAE publications shall apply. 2.1.1GOVERNMENT NAVSHIPS 0900-028-2010“Material Certification Procedures and Criteria Manual for Manned Non- Combatant Submersibles“ MIL-STD-438“Schedule of Piping, Valves, Fittings and Associated Piping
12、Components for Submarine Service“ MIL-STD-777“Schedule of Piping, Valves, Fittings and Associated Piping Components for Naval Surface Ships“ MIL-STD-889“Dissimilar Metals“ MIL-S-001222“Military Specification, Studs, Bolts, Hex Cap Screws and Nuts“ Mechanical Properties and Seawater Behavior of Nitro
13、nic 50 (22 Cr-13N9-5Mn) by I.L. Caplan, David W. Taylor Naval Ship R and the area where reduction is occurring, a cathode. A corrosion cell, then consists of four elements: 1.Anode, seat of corrosion (oxidation) 2.Cathode, seat of reduction 3.Metallic path for electrons from anode to cathode 4.Elect
14、rolytic path of current from anode to cathode The following means may be employed for reducing corrosion rate: (a) isolate the anode from the cathode electrically along the metallic path; (b) isolate the surface of the cathode with nonconductive coating; (c) increase the resistance of the electrolyt
15、ic path by means of nonconducting piping; (d) connect the anode to a sacrificial anode at a still lower potential; (e) impress a protective current from an external source flowing in the electrolyte to the anode. Cathodic protection requires metallic and electrolytic conduction paths to all parts to
16、 be protected. SAE J1781/HIR1694 Reaffirmed MAY87 -5- TABLE 2STRENGTH OF METALS IN AIR AND IN SALT WATER Metal and Alloy Grade Yield Tensile Strength (ksi)(1) 1.1 ksi = 1,000 psi = 6.9 MPa Ultimate Tensile Strength (ksi)(1) Percent Elongation in./in. Percent Reduction in Area Longitudinal Charpy Vee
17、 Notch (ft-lbs)(2) 2.At approimxately 20 C 1 ft-lb = 1.36 Nm Fatigue Strength(3) 108 Cycles Smooth (ksi)(1) Air 3.Rotating Cantilever Specimens, 1,450 cpm Fatigue Strength(3) 108 cycles Smooth (ksi)(1) Salt Water(4) 4.Salt water immersion without cathodic protection Fatigue Strength(3) 108 cycles No
18、tch (ksi)(1) Air Fatigue Strength(3) 108 cycles Notch (ksi)(1) Salt Water(4) Steels High Yield HY80 Strength, HY100 Low Alloy HY130 88 100 140 103 120 150 27 22 21 70 65 65 100 50 42 66 67 9 12 9 20 16 43 4 4 4 Maraging 18 Nickel1801911565 6065 735 4 Precipitation 17-4PH Hardened, H-1100 15-5PH 135
19、135 150 150 17 17 58 58 45 45 60 20 30 10 Titanium Ti-7Al-2Cb-1Ta-1Mo1101251230 4038402020 Ti-6Al-4V1201351225 2055553835 Nickel Inconel 718147175 16020012241530507584252520 Aluminum 5456463312204% (1)IN-862 Excellent Casting material which is particularly effective resisting pitting and crevice cor
20、rosion. (1)Nitronic 50 Al-6X Excellent Wrought materials with good resistance to pitting and crevice corrosion. Can be made into fasteners. Castable. Sacrificial to titanium. (1)SC-1 Seacure Excellent Heat exchanger tubing material. (1)Alloy 20 Cb Good Best resistance to pitting of stainless steels.
21、 Excellent in high velocity. A-286 Fair High tensile strength. 17-4PH Fair Susceptible to crevice attack. Excellent in high velocity. Cathodic protection required. Protection of more than 0.8 volt may cause hydrogen embrittlement. 15-5PH Fair Similar to 17-4PH with better toughness. (1)(Nitronic 40)
22、 21-6-9 Fair Similar to 17-4PH. 316 Fair May pit in excess of 1.3 mm (50 mils) per year in stagnant water. Should be provided with cathodic protection. Galling problems. SAE J1781/HIR1694 Reaffirmed MAY87 -11- 6.Non-MetallicsNon-metallics cover a wide variety of materials including thermoplastics, c
23、omposites, glass, elastomerics and coatings. 6.1PlasticsThe term “plastics“ covers a variety of organic materials ranging from soft to high strength. The number of plastic materials and their usage for view ports, buoyancy material, gaskets, packings, housings, flexible hose and cable has been expan
24、ding at an accelerating rate in the 1970s and will explode in the 1980s. Delrin1, epoxies, fluorocarbons, polyamids (Nylon1), phenolics to name a few. Stainless Steel Mo 4% 316L Fair Weldable variant. Low carbon. 304 Poor Do not use for immersion. Low Alloy Steel (1)HY80, (1)HY100 Poor General surfa
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