Standard Classification System for Rubber Products

ASTM D2000
Callout Decoder

Enter a material callout such as M5BC510 A14 B14 C12 F17 G21 and press Decode. Outputs base requirements, elongation, and all suffix tests with ASTM methods.
Callout String
EXAMPLES:
ASTM D2000-18 (Reapproved 2024) · 24 material types · Suffix data fully verified against original PDF (all 6 parts) · Suffix test conditions and limits per ASTM Table 5 logic · "Same as Grade" resolution is optional · Always verify against the official standard for critical applications.

What Is ASTM D2000?

ASTM D2000 — also published as SAE J200 — is the primary classification system for vulcanized rubber materials used in automotive and industrial applications. It provides a standardized “line callout” notation that encodes a rubber compound’s heat resistance, oil swell resistance, hardness, tensile strength, and additional test requirements into a single alphanumeric string. Engineers specify rubber using D2000 line callouts so that any qualified supplier can provide a conforming compound without requiring a proprietary compound name or formula.

The standard is jointly maintained by ASTM International and SAE International. It applies to solid vulcanized (cured) rubber — not sponge, foam, or uncured stock. Common materials classified under D2000 include nitrile (NBR), EPDM, neoprene (CR), silicone (VMQ), and fluorocarbon (Viton / FKM).

How to Read an ASTM D2000 Line Callout

A complete D2000 line callout follows a defined sequence. For example, M2BG714 A14 B14 EO34 breaks down as:

ElementExampleMeaning
Unit prefixMMetric (MPa, °C). Omit for inch-pound units.
Grade2Number of required suffix tests. Grade 1 = basic; Grade 7 = maximum tests.
Type (heat resistance)BMaximum service temperature. B = 100 °C; C = 125 °C; F = 175 °C; H = 200 °C.
Class (oil resistance)GVolume swell limit in IRM 903 reference oil. A = no requirement; G = 30% max.
Hardness7Shore A durometer, tens digit. 7 = 70 ± 5 Shore A.
Tensile strength14Minimum tensile in MPa (metric). 14 = 14 MPa minimum.
Suffix codesA14 B14 EO34Additional test requirements: heat aging (A), compression set (B), oil resistance (EO).

The Type and Class together identify the rubber compound family. Type B / Class G is nearly always nitrile (NBR); Type H / Class K is fluorocarbon (FKM / Viton). Use the decoder above to instantly map any callout to its compound family, test temperatures, and reference fluids.

Common ASTM D2000 Material Types

Frequently Asked Questions — ASTM D2000

What is the difference between ASTM D2000 Type and Class?
Type defines the rubber’s maximum continuous service temperature (heat resistance), while Class defines resistance to oil swell as measured in ASTM IRM reference oils. Together they narrow the compound family. Type B / Class G identifies nitrile (NBR); Type C / Class E identifies EPDM; Type H / Class K identifies fluorocarbon (FKM).
What does the Grade number mean in an ASTM D2000 callout?
The Grade digit specifies how many additional suffix tests are required beyond the basic tensile and hardness requirements. Grade 1 requires only basic physical properties. Grade 2 adds one suffix test; Grade 3 adds two; and so on up to Grade 7. A higher grade number means more testing, not necessarily a superior compound.
Is ASTM D2000 the same as SAE J200?
Yes. ASTM D2000 and SAE J200 are technically identical standards published jointly by ASTM International and SAE International. They share the same callout format, test methods, and classification tables. Either designation may appear on engineering drawings and they are fully interchangeable.
What are the most common ASTM D2000 suffix codes?
The most frequently specified suffixes are A14 (heat aging at 100 °C for 70 hours), B14 (compression set at 100 °C for 22 hours), EO34 (oil resistance in IRM 903 at 100 °C for 70 hours), F15 (low-temperature brittleness at −40 °C), and C12 (ozone resistance). These five suffixes cover the majority of automotive and industrial sealing requirements.
Can ASTM D2000 be used for non-automotive applications?
Yes. While D2000 was developed for automotive rubber, its classification system is widely used in industrial, aerospace, fluid power, and general sealing applications wherever a standardized, compound-neutral specification is preferred over a proprietary material designation. It provides a common engineering language between design engineers, procurement, and rubber suppliers worldwide.
How is hardness encoded in an ASTM D2000 line callout?
Hardness is encoded as a single digit representing the tens place of the Shore A durometer value, with a standard tolerance of ±5 Shore A. The digit 5 = 50 ± 5 Shore A; 7 = 70 ± 5; and 9 = 90 ± 5. The most common engineering hardnesses are 40, 50, 60, 70, and 80 Shore A.

Reference tool provided by Hanna Rubber Company, Kansas City, MO — distributor of rubber, gasket, hose, and sealing products since 1925. For material selection assistance or custom compound sourcing, contact Hanna Rubber. Always verify final specifications against the current published ASTM D2000 / SAE J200 standard.