The ASTM D 2000 classification system covers the properties of vulcanized rubber materials that are intended for automotive applications but can be used for everything. The system is based on the premise that all rubber products can be arranged into characteristic material designations: types, based on resistance to heat aging, and classes, based on resistance to swelling in oil. The values stated in International Standard (SI) units are regarded as standard. The purpose of this classification system is to provide guidance to engineers in the selection of practical, commercially available rubber materials and also provide a specification of these materials using a “line call-out” designation.
ASTM D 2000 M2BG 710 B14 E014 EO34 F17
ASTM D 2000 = Standards organization and document number, lets you know which classification system is being used.
ASTM D 2000 M2BG 710 B14 E014 EO34 F17
M = Requirements are in SI units “metric”, if there is no “M” indicated, units are in English
ASTM D 2000 M2BG 710 B14 E014 EO34 F17
2 = Applicable suffix grade – it is not necessary to call out a grade.
If none is present, it's assumed to be the base.
B = Material Type based on Temperature Resistance
C = Material Class based on IRM 903 Oil Volume Swell
(See the attached table with a list of standard material type/class.)
ASTM D 2000 M2BG 710 B14 E014 EO34 F17
7 = x 10 is Type A Hardness (i.e. 7 indicates requirement is 70 +/- 5)
10 = Tensile Strength (“M” In line call out indicates units are in Mpa)
otherwise tensile is measured in psi.
The four highlighted sections above will always come in this order, the following string of additional letters and numbers are the specified additional tests of the rubber product in different conditions.
Suffix requirements shall be specified only as needed to define qualities necessary to meet service requirements. Not all suffix values available for a given material need to be specified. Basic requirements are always in effect, unless superseded by specific suffix requirements in the “line call-out.”
To find the exact tables and specifications on class, type, and grade please consult the ASTM book.
Please note there are more classification systems widely used, not all products require the specificity that the ASTM D 2000 marks. For all your design needs, consult www.customrubbercorp.com, we ca handle your design needs material selection, callout designation and production needs all in one place.