1、 A-A-59588B 30 January 2012 SUPERSEDING A-A-59588A 7 July 2005 COMMERCIAL ITEM DESCRIPTION RUBBER, SILICONE The General Service Administration has authorized the use of this commercial item description for all federal agencies. 1. SCOPE. This commercial item description (CID) covers six classes of s
2、ilicone rubber, in various grades. 2. CLASSIFICATION. The silicone rubber shall be of the following classes and grades, as specified: Class 1A - Low temperature resistant. Grades - 40, 50, 60, 70, 80 Class 1B - Low temperature resistant and low compression set at high temperature. Grades - 40, 50, 6
3、0, 70, 80 Class 2A - High temperature resistant. Grades - 25, 40, 50, 60, 70, 80 Class 2B - High temperature resistant and low compression set. Grades - 25, 40, 50, 60, 70, 80 Class 3A - Low temperature, tear and flex resistant. Grades - 30, 50, 60 Class 3B - Tear and flex resistant. Grades - 30, 50
4、 60, 70, 80 ASMC N/A FSC 9320 INCH-POUND Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center Philadelphia, ATTN: DSCP- NASA, 700 Robbins Avenue, Philadelphia, PA 19111-5096 or emailed to mailto:dscpg extruded shapes or tubing; or molded shapes, as spec
5、ified in the contract or purchase order (see 7.2). 3.4 Dimensions and tolerances. Dimensions and tolerances shall be as indicated in the contract or purchase order (see 7.2). If no tolerances are specified, A-3 commercial tolerances of the Rubber Manufacturers Association (RMA) Rubber Handbook shall
6、 apply for molded solid rubber products, as shown in table II, and the commercial tolerances of the RMA Rubber Sheet Packing Handbook shall apply for packing, as shown in table III. Commercial tolerances, as shown in tables IV, V, and VI shall be applied for extruded shapes, extruded tubing and cale
7、ndered sheet, respectively. Dimensions and tolerances for o-rings shall be as specified in SAE-AS568 (see A-A-55801 for standard part numbers), or in accordance with the applicable part number for non-standard sizes. 3.5 Extruded tubing. Unless otherwise specified in the contract or purchase order (
8、see 7.2), the length of extruded tubing shall be furnished in coils containing 100(30.48), 200(60.96), 500(152.4), or 1000(304.8) feet(m) per coil. Each coil shall contain not more than three individual lengths of tubing per 100 feet (30.48 m). No individual length of tubing shall be less than 15 fe
9、et (4.57 m). 3.6 Color. Unless otherwise specified (see 7.2), the color of the silicone rubber shall be the natural color of the compound furnished. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE I. Physical and mechanical properties of sili
10、cone. PROPERTY VALUES AND RECOMMENDED ASTM TEST METHODS UNAGED AFTER OVEN AGING 2/ CLASS GRADE Hardness, maximum Shore-A- Durometer ASTM D 2240 Tensile strength, minimum MPa (psi) ASTM D 412 Elongation minimum % ASTM D 412 Tear resistance, minimum kN/m (ppi) ASTM D 624 Compression set, maximum % 1/
11、ASTM D 395 Hardness change maximum durometer ASTM D 2240 Tensile strength change, maximum % ASTM D 412 Channel, Nonmetallic, Shape 1 A-A-55451 Rubber, Silicone; Channel, Nonmetallic, Shape 3 A-A-55757 Rubber, Silicone; Gasket, Shape 13 A-A-55759 Rubber, Silicone; Rubber Sheet Solid, Shape 15 A-A-557
12、60 Rubber, Silicone; Strip Shape 16 A-A-55762 Rubber, Silicone; Strip Shape 18 A-A-55801 Rubber, Silicone; Packing Preformed (O-Ring) 7.4 Intended use. The silicone rubber covered by this specification is intended generally for use under the conditions listed below. Users should, however, consider a
13、ll the requirements of this specification when selecting a class and grade of silicone rubber. Class 1 - Where resistance to extreme low temperature is required to approximately -73C (-100F). Class 1 material also possesses resistance to extreme high temperature (to approximately 219C (425F), but le
14、ngth of service at high temperatures is less than that of the class 2 materials. The class 1B material also possesses low compression set at high temperature. Class 2 - Where resistance to extreme high temperature is required to approximately 219C (425F). Class 2 material possesses low temperature r
15、esistance, but only to about -62C (-80F). Class 2B material also possesses low compression set. Class 3A - Where resistance to extreme low temperature to approximately -75C (-103F), and resistance to tearing and flexing are required. Class 3A material also possesses resistance to extreme high temper
16、ature to approximately 204C (400F). Class 3B - Where resistance to tearing and flexing are required, but the resistance to extreme low temperature requirement is less than that of the class 3A material. Temperature range for the class 3B material is approximately between -70C (-94F) and 204C (400F).
17、 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59588B 7.5 Part identification number (PIN). The following PIN procedure is for government purposes and does not constitute a requirement for the contractor. The example describes a part numberin
18、g system for CID A-A-59588. A-A-59588 1A 25 Grade 25, 30, 40, 50, 60, 70, 80 Class 1A, 1B, 2A, 2B, 3A, 3B CID number 7.6 Key words. Class Flex resistant Grade Low composition 7.7 Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where changes f
19、rom the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the margin
20、al notations and relationship to the last previous issue. MILITARY INTERESTS: CIVIL AGENCY COODINATION ACTIVITY: GSA-FAS Custodians Army MR Preparing activity: Navy AS DLA IS Air Force 11 (Project 9320-2012-015) Reviewers Army AR, CR, CR4, GL, MD, MI, SM Navy OS, SH Air Force 84, 99 NOTE: The activi
21、ties listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil/ 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
