Flat industrial rubber sheets, die-cut gaskets, and specialized rubber packing configurations.
Official copies of the are typically available through authorized standards organizations:
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These are just a few examples. The standard covers many more material grades, each tailored to specific combinations of properties. The full list of classifications is detailed in the complete JIS K 6380 document.
is the Japanese industrial standard that specifies rubber hoses for hydraulic and pneumatic applications , focusing on wire-braid reinforced rubber hoses — the kind that power construction equipment, industrial machinery, and agricultural implements. The full list of classifications is detailed in
The second letter indicates the maximum continuous operating temperature the rubber sheet can endure without significant degradation of its physical properties. Class Letter Max Operating Temperature 70°C (158°F) B 100°C (212°F) C 120°C (248°F) D 150°C (302°F) E 175°C (347°F) F 200°C+ (392°F+) 3. Hardness (First Digit)
Evaluates changes in hardness, tensile strength, and elongation after exposure to high temperatures for a specified duration (e.g., 70 hours at 100°C). Class Letter Max Operating Temperature 70°C (158°F) B
Matches the highest Type and Class designations for extreme chemical and thermal resistance.
Classified by letters (A through K) based on how much the material swells when exposed to specific reference oils. Grade Numbers:
Chloroprene (Neoprene) sheets used in outdoor environments, marine applications, and mild chemical exposure. Example 3: JIS K 6380 CC6142
Low oil resistance (Class B) with heat resistance up to 120°C (Class C).