1、KTI-5210 REVISION: C 1 MATERIAL SELECTION LIST FOR OXYGEN SERVICE APPROVED: _ David Lubas, Chief (Acting) Materials and Processes Engineering Branch (NE-L4) _ Virginia J. Ward, Center Materials Representative (CMR) Materials and Processes Engineering Branch (NE-L4) 1. FOREWORD Materials selection re
2、quirements for oxygen service have changed significantly since the last revision of this document. Historically, flammability and mechanical impact ratings were the main criteria for materials selection for oxygen service. Materials used in liquid oxygen (LO2) or gaseous oxygen (GO2) environments mu
3、st be evaluated as described in NASA-STD-6001B, section 6.3. Materials selection for LO2 and GO2 environments in accordance with NASA-STD-6001B begins with pre-selection of materials based on flammability and combustion test data, followed by flammability assessment of materials in the worst-case co
4、nfiguration and environment. Material flammability ratings based on NASA-STD-6001B test results for many materials, including those identified in this document, are found in the Materials and Processes Technical Information System (MAPTIS) database and ASTM G63 and ASTM G94. If test results are not
5、available through ASTM, NASA, or other sources, materials should be submitted to NASA/NE-L2-T for testing. Requests for flammability testing should be addressed to NASA/MC: NE-L2-T, Kennedy Space Center, FL 32899. The test results will be electronically archived locally at KSC by NASA/NE-L and submi
6、tted for inclusion in MAPTIS II. If the materials are determined to be nonflammable in their use configuration and environment, and no additional material control is required, the materials may be used. If the materials are determined to be flammable, an oxygen compatibility assessment1 (OCA) must b
7、e performed on the components and systems in accordance with NASA/TM-2007-213740, which provides an overview of oxygen fire hazards and procedures which are consistent with the latest versions of ASTM G63, ASTM G94, and ASTM MNL 36. The OCA is used to determine whether the material may be used, or w
8、hether there is a need to perform supplemental material, configuration, or component testing. Requests for oxygen compatibility testing of materials should be addressed to NASA/MC: NE-L2-T, Kennedy Space Center, FL 32899. Oxygen compatibility test results will be transmitted to the customer by NASA/
9、NE-L. The test results will be electronically archived locally at KSC by NASA/NE-L and submitted for inclusion in MAPTIS II. Contact NASA M validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-KTI-5210 REVISION: C 2 Materials used
10、in oxygen systems for the Shuttle program were typically been tested for flammability and mechanical impact, which have been the basic criteria for materials selection for oxygen service for more than 20 years. Materials selection for post-Shuttle programs will be in accordance with the materials se
11、lection and OCA requirements called out in NASA-STD-6016 for flight and NASA-STD-5005C for GSE. Materials used in existing oxygen system designs with a history of safe use are considered acceptable for continued use; however, changes to materials used in such systems must be assessed on an individua
12、l basis. Contact NASA M Promoted Ignition (NASA-STD-6001B, Test 17) data are presented for metallic materials. Codes are assigned to each material per KTI-5209, Material Usage Code. The nonmetallic materials listed in Table 1 were also tested per NASA-STD-6001B supplemental tests for mechanical impa
13、ct in ambient pressure LO2 (Test 13A) and variable pressure GO2 and LO2 (Test 13B). The materials listed in Table 1 are rated A2 for mechanical impact up to the operating pressures listed in the table. Mechanical impact is only considered a credible ignition mechanism in certain components; mechanic
14、al impact test results can be utilized as an aid to the OCA process when mechanical impact is identified as a credible ignition mechanism. Batch/lot testing for mechanical impact is no longer required for all soft goods used in oxygen service in the 1,650 - 6,700 psi range. NASA Design Engineering o
15、r NASA M number of tests = 20 and the number of reactions = 0 (zero), or number of tests = 60 and the number of reactions = 1 (one). Standard impact energy is 72 ft-lb, but may vary. Consult MAPTIS for actual test conditions. RELEASED - Printed documents may be obsolete; validate prior to use. Provi
16、ded by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-KTI-5210 REVISION: C 3 The vendors and applicable specifications for the materials listed in this KTI have been updated from the previous revision. These listings do not take into account the effects of unk
17、nown formulation and/or process changes that could be performed by a manufacturer, which could result in a material performing differently than these test results would indicate. Materials requiring initial testing, revalidation testing, or mechanical impact testing in accordance with NASA-STD-6001B
18、 may be submitted to the KSC Materials Science Laboratory. 3. GUIDELINES FOR MATERIALS SELECTION FOR OXYGEN SYSTEM DESIGN The list is new to this revision and is intended as a starting point for materials selection in the preliminary design phase. This list is to be utilized only as reference prior
19、to evaluation of the system for oxygen service. 3.1 Nonmetallic Materials (Soft Good Materials and Lubricants) Nearly all soft goods and lubricants are flammable in oxygen at ambient pressure. Selection of soft goods is based on their relative performance in various oxygen compatibility studies (aut
20、ogenous ignition, heat of combustion, oxygen index, mechanical impact, and gaseous impact tests) and histories of use within NASA and other institutions. In addition to material compatibility, mechanical properties of soft goods and lubricants must be considered, e.g., cold flow of PTFE. Information
21、 on material trade names within the chemical classes is found in Table 1. Consult ASTM G63 for further information on selection of nonmetallic materials for oxygen service. The following nonmetallic materials are recommended for consideration for oxygen service: Plastics Polytetrafluoroethylene (PTF
22、E) Fluorinated ethylene propylene (FEP) Perfluoroalkoxy (PFA) Polychlorotrifluoroethylene (PCTFE) Polyimide (PI) Amorphous fluoropolymers Elastomers Fluorocarbonelastomer (FKM) Perfluoroelastomer (FFKM) Fluorosilicone elastomer (MVQ) RELEASED - Printed documents may be obsolete; validate prior to us
23、e. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-KTI-5210 REVISION: C 4 Lubricants Perfluoropolyether (PFPE) Chlorotrifluoroethylene (CTFE) oligomers Molybdenum disulfide (MoS2) dry lubricants 3.2 Ceramics All ceramics without organic fillers or b
24、inders may be used in oxygen service; however, due to the brittleness of many ceramics, consideration of the effects of failure, including the functionality of components within the system, is recommended. Contact NASA M Replaces Braycote 600 with environment friendly formula. May require re-test. C
25、astrol Industrial North America, Inc. Naperville, IL (800) 621-2661 L01 Perfluoroalkylpolyether Grease (PFPE Base Oil Plus PTFE Telomer) PFPE Braycote 806 NT NT A (1650) NT MIL-PRF-27617 Castrol Industrial North America, Inc. Naperville, IL (800) 621-2661 L01 Perfluoroalkylpolyether Grease PFPE NYE
26、UniFlor 8531R (Formerly Fluoroether) NT NT A (1650) NT NONE: Replaces Fluoroether with environment friendly formula. May require re-test NYE Lubricants, Inc., Fairhaven, MA (508) 996-6721 L01 Polychlorotrifluoroethylene Jelled Oil with Polytetrafluoroethylene Particles) PCTFE validate prior to use.
27、Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-KTI-5210 REVISION: C 7 CODE GENERIC NAME CHEMICAL CLASS FORMULATION NAME AIT (C) AIT TEST PRESSURE (psia) Hc (kJ/g) MECHANICAL IMPACT OI (%) SPECIFICATION/CERTS/NOTES LAST LISTED OWNER L01 Perfluoroalk
28、ylpolyether Grease (PFPE Base Oil plus PTFE Thickener) PFPE Demnum L200 NT NT A (1650) NT NONE Daikin America, Inc., Orangeburg, NY (800) 365-9570 L05 Polychlorotrifluoroethylene Oil CTFE oil LOX Pump Oil NT NT A (1650) NT 79K22280 KSC Laboratory-Manufactured, using Halocarbon Oil No. 27 as base L06
29、 Perfluoroalkylpolyether Oil PFPE oil Krytox 143AC 4271 1500 NT A (6700) NT NONE DuPont, North America (800) 222-8377 L06 Perfluoroalkylpolyether Oil PFPE oil Fomblin Y-LVAC 06/6 427+1 1500 NT A (6700) NT NONE Solvay Solexis, Inc. Thorofare, NJ (800) 554-2874 L06 Perfluoroalkylpolyether Oil PFPE oil
30、 Fomblin Y-LVAC 16/6 427+1 1500 NT A (6700) NT NONE Solvay Solexis, Inc. Thorofare, NJ (800) 554-2874 L09 Polychlorotrifluoroethylene Oil CTFE oil Halocarbon Oil 5003 1500 4.193 A (1650) NT NONE Halocarbon Products Corp. Riveredge, NJ (201) 262-8899 L08 Polychlorotrifluoroethylene Grease (Polymer Th
31、ickened) PCTFE grease Halocarbon 25-5S Grease 427+1 1500 5.02 - 5.443 A (1650) NT NONE Halocarbon Products Corp. Riveredge, NJ (201) 262-8899 L08 Polychlorotrifluoroethylene Grease CTFE grease Fluorolube GR-362 Grease 4271 1500 4.991 A (1650) 67 +/- 41 NONE Gabriel Performance Products Ashtabula, OH
32、 (866) 800-2436 L09 Polychlorotrifluoroethylene Oil CTFE grease Fluorolube LG160 Grease 3821 1500 2.521 A (1650) NT NONE Gabriel Performance Products Ashtabula, OH (866) 800-2436 L10 Solid Dry-Film Lubricant MoS2 Base Dri-Lube 703 NT NT A (1650) NT NONE Drilube/All Metals Processing Stanton, CA (714
33、) 828-8238 L10 Solid Dry-Film Lubricant MoS2 Base Dri-Lube 831 NT NT A (1650) NT NONE Everlube Products Peachtree City, GA (800) 428-7802 L10 Solid Dry-Film Lubricant MoS2 Base Dri-Lube 842 2053 9.633 A (1650) NT NONE L11 Solid Dry-Film Lubricant (Sodium Silicate Binder ) MoS2 Base Everlube 812 NT N
34、T A (6700) NT SAE-AMS-3084 L11 Solid Dry-Film Lubricant (Sodium Silicate Binder ) MoS2 validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-KTI-5210 REVISION: C 8 CODE GENERIC NAME CHEMICAL CLASS FORMULATION NAME AIT (C) AIT TEST P
35、RESSURE (psia) Hc (kJ/g) MECHANICAL IMPACT OI (%) SPECIFICATION/CERTS/NOTES LAST LISTED OWNER L13 Solid Dry-Film Lubricant (Inorganic Binder) MoS2 first batch produced in March, 2005. Mechanical impact testing was for material produced prior to March 2005. Castrol Industrial North America, Inc. Nape
36、rville, IL (800) 621-2661 MISCELLANEOUS M25 Polytetrafluoroethylene Submicronic Spheres Embedded Within Electroless Nickel Coating PTFE Niflor NT NT A (1650) NT NONE Norman Hay/Surface Technology plc, Coventry, UK; Fothergill validate prior to use. Provided by IHS Not for ResaleNo reproduction or ne
37、tworking permitted without license from IHS-,-,-KTI-5210 REVISION: C 9 CODE GENERIC NAME CHEMICAL CLASS FORMULATION NAME AIT (C) AIT TEST PRESSURE (psia) Hc (kJ/g) MECHANICAL IMPACT OI (%) SPECIFICATION/CERTS/NOTES LAST LISTED OWNER PLASTICS P01 Polytetrafluoroethylene PTFE PTFE; Teflon TFE 434-5262
38、 1500 4.78-7.122 A (6700) 95-1002 The Following Specifications are Applicable for Code PO1 Materials: A-A-58092 (PTFE Tape, Anti-Seize); SAE-AMS-3668 (PTFE Moldings, Premium Grade); SAE-AMS-3669 (PTFE Sheet, Molded, Premium Grade); SAE-AMS-3657 (PTFE Extrusions, Premium Strength); SAE AMS-3658 (PTFE
39、 Extrusions, Premium Strength, Stress-Relieved, Radiographically Inspected); SAE-AMS-3659 (PTFE Extrusions, Premium Strength, Stress-Relieved ); ASTM-D3294 (PTFE Resin Molded Sheet and Molded Basic Shapes); ASTM-D3308 (PTFE Resin Skived Tape); ASTM-D3369 (PTFE Resin Cast Film); SAE-AS-8791 (PTFE Ret
40、ainers); ASTM-D1710 (Extrusion and Compression Molded PTFE Rod and Tubing); SAE-AMS-3652 (PTFE Film, Non-Critical Grade); SAE-AMS-3656 (PTFE Extrusions, Normal Strength); SAE-AMS-3660 (PTFE Moldings, General Purpose Grade), SAE-AMS-3667 (PTFE Sheet, Molded, General Purpose Grade); ASTM-D4894 (PTFE G
41、ranular Molding and Ram Extrusion Matls.); ASTM-D4895 (PTFE Resin Produced from Dispersion) DuPont, North America (800) 222-8377 P01 Polytetrafluoroethylene PTFE Algoflon F7, Algoflon F2 NT NT A (6700) 95%4 Solvay Solexis, Inc. Thorofare, NJ (800) 554-2874 P02 Perfluoro(ethylene-propylene) Copolymer
42、 FEP Teflon FEP 3782 1500 10.472 A (6700) 77-952 ASTM-D2116 (FEP-Fluorocarbon Molding and Extrusion Matls.); ASTM-D3368 (FEP-Fluorocarbon Sheet and Film); ASTM-D3296 (FEP-Fluorocarbon Tube); SAE-AMS-3647 (FEP Film and Sheet) DuPont, North America(800) 222-8377 P03 Glass-Filled Polytetrafluoroethylen
43、e PTFE Fluorogold 4842 500 7.122 A (6700) None2 ASTM-D4894, Type II; ASTM-D4745, Type I, Grade 2 St. Gobain Performance Plastics (800) 544-0080 P04 Glass-Filled Polytetrafluoroethylene PTFE Fluorogreen E-600 4792 500 10.052 A (6700) None2 ASTM-D4894, Type II; ASTM-D4745, Type I, Grade 2 UFC Fluorogr
44、een Co. Houston, TX (713) 460-2500 P06 Glass-Filled Polytetrafluoroethylene PTFE RT/Duroid 5870 NT NT A (1650) NT ASTM-D4894; ASTM-D4745 Rogers Corp. Chandler, AZ (480) 961-1382 RELEASED - Printed documents may be obsolete; validate prior to use. Provided by IHS Not for ResaleNo reproduction or netw
45、orking permitted without license from IHS-,-,-KTI-5210 REVISION: C 10 CODE GENERIC NAME CHEMICAL CLASS FORMULATION NAME AIT (C) AIT TEST PRESSURE (psia) Hc (kJ/g) MECHANICAL IMPACT OI (%) SPECIFICATION/CERTS/NOTES LAST LISTED OWNER P07 Perfluoroalkoxy perfluoropolymer PFA Teflon PFA 4241 1500 5.231
46、A (1650) NT ASTM-D3307 (PFA-Fluorocarbon Resin Molding and Extrusion Materials) DuPont, North America (800) 222-8377 P09 Polychlorotrifluoroethylene PCTFE Neoflon CTFE 377-3822 5.12 - 5.152 A (1650) NT ASTM-D7194 (Aerospace Parts Machined from PCTFE) Note: ASTM-D7194 replaces ASTM-D1430, SAE-AMS-364
47、5, 3646, and 2650 for purposes of new and direct procurement of moldings. ASTM-D1430 is still valid for classification purposes. Daikin America, Inc. Orangeburg, NY (845) 365-9500 TBD Polychlorotrifluoroethylene (PCTFE-Film Grade) PCTFE Aclar 22A 3901 1500 NT A (1650) NT ASTM-D3595; SAE-AMS-3649 Hon
48、eywell International Specialty Films Morristown, NJ (800) 934-5679 P12 Polytetrafluoroethylene Compound (Filled, Reinforced) PTFE Rulon A 4842 NR 5.862 A (6700) None2 NONE St. Gobain Performance Plastics (800) 544-0080 P14 Polyimide Resin (15% Graphite Fill) PI Vespel SP-21 343-5622 1500 25.54-31.812 A (1650) 532 ASTM-D6456 DuPont, North America (800) 222-8377 P32 Silica-Filled Polytetrafluoroethylene PTFE Garlock 3502 (Fawn Gylon) NT 6.28-7.123 A (1650) NT ASTM-D4895 Garlock Sealing Tec
