1、BRITISH STANDARD BS 5176:2003 Classification system for vulcanized rubbers Specification ICS 83.060 BS 5176:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 October 2003 BSI 4 November 2003 The following BSI references relate to the wo
2、rk on this British Standard: Committee reference PRI/54 Draft for comment 02/120948 DC ISBN 0 580 42773 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted to PRI/54, Rubber compounds, upon which the following bodies were represented: British Rub
3、ber Manufacturers Association Ltd. Chemical Industries Association Ministry of Defence RAPRA Technology Ltd Tun Abdul Razak Research Centre Amendments issued since publication Amd. No. Date CommentsBS 5176:2003 BSI 4 November 2003 i Contents Page Committees responsible Inside front cover Foreword ii
4、 1S c o p e 1 2 Normative references 1 3 Classification system 2 Annex A (informative) Type of rubber normally used 55 Annex B (informative) Line call-outs of requirements in British Standard specifications 56 Bibliography 58 Figure 1 Examples of line call-outs 10 Table 1 Basic requirements for esta
5、blishing Type by heat resistance 2 Table 2 Basic requirements for establishing Class by oil resistance 3 Table 3 Meaning of suffix letters 4 Table 4 Methods of test 5 Table 5 Suffix numbers to indicate temperature of test 8 Table 6 Basic and supplementary requirements 11 Table 6/1 MAA materials: bas
6、ic requirements (Grade 1) 11 Table 6/2 MAA materials: supplementary requirements 12 Table 6/3 MAJ materials: basic requirements (Grade 1) 13 Table 6/4 MAJ materials: supplementary requirements 14 Table 6/5 MAK materials: basic requirements (Grade 1) 15 Table 6/6 MAK materials: supplementary requirem
7、ents 16 Table 6/7 MBA materials: basic requirements (Grade 1) 17 Table 6/8 MBA materials: supplementary requirements 18 Table 6/9 MBC materials: basic requirements (Grade 1) 19 Table 6/10 MBC materials: supplementary requirements 20 Table 6/11 MBE materials: basic requirements (Grade 1) 21 Table 6/1
8、2 MBE materials: supplementary requirements 22 Table 6/13 MBF materials: basic requirements (Grade 1) 23 Table 6/14 MBF materials: supplementary requirements 24 Table 6/15 MBG materials: basic requirements (Grade 1) 25 Table 6/16 MBG materials: supplementary requirements 26 Table 6/17 MBK materials:
9、 basic requirements (Grade 1) 28 Table 6/18 MBK materials: supplementary requirements 29 Table 6/19 MCA materials: basic requirements (Grade 1) 30 Table 6/20 MCA materials: supplementary requirements 30 Table 6/21 MCE materials: basic requirements (Grade 1) 31 Table 6/22 MCE materials: supplementary
10、 requirements 31 Table 6/23 MCH materials: basic requirements (Grade 1) 32 Table 6/24 MCH materials: supplementary requirements 33 Table 6/25 MDA materials: basic requirements (Grade 1) 35 Table 6/26 MDA materials: supplementary requirements 36 Table 6/27 MDH materials: basic requirements (Grade 1)
11、37 Table 6/28 MDH materials: supplementary requirements 38 Table 6/29 MEE materials: basic requirements (Grade 1) 39 Table 6/30 MEE materials: supplementary requirements 40 Table 6/31 MEH materials: basic requirements (Grade 1) 41 Table 6/32 MEH materials: supplementary requirements 42BS 5176:2003 i
12、i BSI 4 November 2003 Page Table 6/33 MFC materials: basic requirements (Grade 1) 43 Table 6/34 MFC materials: supplementary requirements 44 Table 6/35 MFE materials: basic requirements (Grade 1) 45 Table 6/36 MFE materials: supplementary requirements 46 Table 6/37 MFK materials: basic requirements
13、(Grade 1) 47 Table 6/38 MFK materials: supplementary requirements 48 Table 6/39 MGE materials: basic requirements (Grade 1) 49 Table 6/40 MGE materials: supplementary requirements 50 Table 6/41 MHK materials: basic requirements (Grade 1) 51 Table 6/42 MHK materials: supplementary requirements 52 Tab
14、le 6/43 MJK materials: basic requirements (Grade 1) 53 Table 6/44 MJK materials: supplementary requirements 54 Table B.1 Conversion table for material specifications: BS 1154, Specification for natural rubber compounds 57 Table B.2 Conversion table for material specifications: BS 1155, Specification
15、 for natural rubber compounds for extrusion 57 Table B.3 Conversion table for material specifications: BS 6014, Specification for ethylene-propylene rubber compounds 58BS 5176:2003 BSI 4 November 2003 iii Foreword This British Standard has been prepared under the direction of PRI/54, Rubber compound
16、s. It provides means of specifying the physical properties of vulcanized rubbers in a convenient notation, and in the interests of rationalization of test methods limits the times and temperatures available for selection in connection with certain tests. It supersedes BS 5176:1975, which is now with
17、drawn. The classification system is based on the physical properties of the vulcanized rubber rather than on compositional requirements and follows closely the system published by the American Society for Testing and Materials (ASTM Designation: D2000 “Standard classification system for rubber produ
18、cts in automotive applications”). This standard is intended for use in a wide range of industries and is not limited to automotive applications. In the preparation of this British Standard, consideration has been given to the economic importance of restricting the number of vulcanized rubbers in gen
19、eral demand. To this end, rubbers of low technical quality have in general been omitted. The tests employed in this standard have been chosen for their reproducibility and ability to assess the properties of a rubber material. They are not intended to be simulated service tests, which can be unsatis
20、factory for control purposes. The properties listed in this standard are not to be regarded as design data, especially with respect to heat resistance. As service conditions vary considerably, it is recommended that the selection of a rubber material for a given application should be discussed betwe
21、en user and supplier, so that all relevant operating factors may be considered. NOTE In order to assist in the adoption of this classification system the types of rubber normally used to prepare the various vulcanizates are given in Annex A. The annex does not, however, form part of the classificati
22、on system. The major changes in this revision compared with the 1975 edition and Amendment No 1 published in 1985 are as follows: a) the replacement in Table 4 of ASTM D1171 by BS ISO 4665 for outdoor weathering resistance; b) recognition in Table 4 that reference Oil No. 2 and 3 have been replaced
23、by reference Oil IRM902 and IRM903 respectively, although in accordance with BS 903-A16 (also numbered as BS ISO 1817), the terms Oil No. 2 and Oil No.3 continue to be used; c) the replacement in Table 6 of all specified limits for tear strength by “Limits to be agreed”. The requirement in the first
24、 edition was based on a crescent tear test piece having a nick size of 0.5 mm. The nick size now specified in BS 903-A3 is 1.0 mm and it cannot assume similar results will be given; d) the deletion of Liquid 100 for fluid resistance (E4 in Table 4) and deletion of corresponding requirements for MCE,
25、 MDH and MEH materials, following the withdrawal of the test liquid from BS 903-A16; e) the addition in Table 6/29 and Table 6/30 of a new material designation, MEE for ethylene-acrylic rubbers; f) the extension of Annex A to other suitable types of rubber; g) clarification of the use of the Z suffi
26、x. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an insi
27、de front cover, pages i and ii, pages 1 to 58, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.iv blankBS 5176:2003 BSI 4 November 2003 1 1 Scope This British Standard specifies a system of classification of solid
28、 vulcanized rubbers based on the test values obtained in standard laboratory tests for physical properties. This classification does not imply that every combination of properties for which a code can be given is technically feasible. In addition this British Standard seeks to limit the variety of v
29、ulcanized rubbers used in industry and Table 6 contains a range of vulcanized rubbers to meet the great majority of industrial needs. To do so, an attempt has been made to align several rubbers with the physical property requirements of other well-established British Standard Specifications (see Ann
30、ex B). This standard is not intended for use with thermoplastic elastomers, including those sometimes described as thermoplastic vulcanizates. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the reference ci
31、ted applies. For undated references, the latest edition of the referenced document (including any amendments). BS 903-A1, Physical testing of rubber Part A1: Determination of density. BS 903-A2, Physical testing of rubber Part A2: Determination of tensile stress-strain properties. BS 903-A3, Physica
32、l testing of rubber Part A3: Determination of tear strength (trouser, angle and crescent test pieces). BS 903-A4, Physical testing of rubber Part A4: Determination of compression stress-strain properties. BS 903-A6, Physical testing of rubber Part A6: Determination of compression set at ambient, ele
33、vated or low temperatures. BS 903-A8, Physical testing of rubber Part A8: Determination of rebound resilience. BS 903-A9, Physical testing of rubber Part A9: Determination of abrasion resistance. BS 903-A13, Physical testing of rubber Part A13: Determination of the stiffness at low temperatures (Geh
34、man test). BS 903-A16, Physical testing of rubber Part A16: Determination of the effect of liquids. BS 903-A19, Physical testing of rubber Part A19: Accelerated ageing and heat resistance tests. BS 903-A25, Physical testing of rubber Part A25: Determination of low-temperature brittleness. BS 903-A26
35、, Physical testing of rubber Part A26: Determination of hardness (hardness between 10 IRHD and 100 IRHD). BS 903-A33, Physical testing of rubber Part A33: Methods of test for staining in contact with organic material. BS 903-A37, Physical testing of rubber Part A37: Determination of tendency to adhe
36、re to and to corrode metals. BS 903-A42, Physical testing of rubber Part A42: Determination of stress relaxation in compression at ambient and at elevated temperatures. BS 903-A43, Physical testing of rubber Part A43: Determination of resistance to ozone cracking (static strain test). BS 1154, Speci
37、fication for natural rubber compounds. BS 1155, Specification for natural rubber compounds for extrusion. BS 6014, Specification for ethylene propylene rubber compounds. BS ISO 132, Rubber, vulcanized or thermoplastic Determination of resistance to flex cracking and crack growth (De Mattia). BS ISO
38、4665, Rubber, vulcanized or thermoplastic Resistance to weathering.BS 5176:2003 2 BSI 4 November 2003 3 Classification system 3.1 Basic requirements 3.1.1 General The basic classification code for a vulcanized rubber shall be: a) the letter M to indicate that metric units are used; b) a letter indic
39、ating the Type assigned on its level of heat resistance (see 3.1.2); c) a letter indicating the Class assigned on its level of resistance to mineral oil (see 3.1.3); d) a single figure indicating the hardness range (see 3.1.4); e) a double figure indicating the tensile strength (see 3.1.4). 3.1.2 Ty
40、pe (heat resistance) This shall be based on changes in tensile strength of not more than 30 %, elongation at break of not more than p50 %, and hardness, of not more than 15 IRHD, after heat ageing for 70 h at an appropriate temperature. The temperatures at which these materials shall be tested for d
41、etermining Type shall be as listed in Table 1. 3.1.3 Class (oil resistance) This shall be based on the resistance of the material to swelling in oil No. 3 of BS 903-A16. In the test, the immersion time shall be 70 h and the oil temperature shall be the Type temperature or 150 C, whichever is the low
42、er. Limits of swelling for each Class shall be as shown in Table 2. NOTE 150 C has been chosen as the highest temperature for Class, as representing the limit of oil stability. Table 1 Basic requirements for establishing Type by heat resistance Type Temperature C A7 0 B 100 C 125 D 150 E 175 F 200 G
43、 225 H 250 J 275BS 5176:2003 BSI 4 November 2003 3 Table 2 Basic requirements for establishing Class by oil resistance 3.1.4 Mechanical properties The basic mechanical properties indicated in all cases shall be a single figure for the hardness, followed by a double figure for the tensile strength in
44、 megapascals (MPa). EXAMPLE The code 507 indicates a hardness of IRHD and a tensile strength of 7 MPa minimum and the code 710 indicates a hardness of IRHD and a tensile strength of 10 MPa minimum. 3.2 Supplementary requirements 3.2.1 General When properties are needed that either supersede or suppl
45、ement the basic requirements, they shall be indicated by the use of Grade numbers and by means of suffix letters and numbers. The Grade number indicates the test limits, the suffix letter indicates the property to be tested, and the suffix number indicates the test method and test conditions. The la
46、st column in Table 6 under “Basic requirements” for each material shall give the available Grade numbers for supplementary requirements. Supplementary requirements shall be specified only as needed to define qualities necessary to meet service requirements; not all suffix values available for a mate
47、rial need be specified. However, if all the supplementary requirements for a given Grade number are required, this may be indicated by the word ALL to abbreviate the line call-out (see 3.2.2 and 3.4). Basic requirements shall always be effect, unless superseded by specific supplementary requirements
48、 in the line call-out. 3.2.2 Grade numbers To specify supplementary requirements, a system of prefix Grade numbers shall be used. Grade 1 shall indicate that only the basic requirements are compulsory, and no supplementary requirements are permitted. Grades other than Grade 1 are used for expressing
49、 supplementary requirements. Grade numbers shall be written as material prefix numbers, e.g 2MBC510, 4MBK610 or 3MHK714. Class Volume swell, % max. A No requirement a C1 2 0 D1 0 0 E8 0 F6 0 G4 0 H3 0 J2 0 K1 0 NOTE 1 The selection of Type assessed by standard laboratory test methods is an indication of the inherent dry heat resistance that can normally be
