Jis K 6380 Pdf May 2026
JIS K 6380 isn’t flashy — but it’s a quiet pillar of reliability in hydraulic systems across Asia. Whether you’re auditing a hose assembly, translating a Japanese machine manual, or designing for export, understanding this standard saves you from mismatched components, costly downtime, or safety risks.
And if you’re still looking for that PDF: remember that respecting the standard means using the official document. But for quick reference, the summary above gives you the soul of JIS K 6380 in under 500 words.
Would you like a downloadable one-page fact sheet or comparison table based on this write-up?
The standard JIS K 6380 defines the performance classes and physical property requirements for rubber materials used in industrial packings and similar products. Originally established in 1976, the most current version is JIS K 6380:2014, which provides a systematic classification for vulcanized or thermoplastic rubber materials based on their specific industrial applications. Core Scope and Applications
JIS K 6380 is the primary Japanese Industrial Standard for rubber packing materials used across diverse industries, from automotive to chemical processing.
Included: Industrial rubber packings and similar industrial rubber products.
Excluded: Materials specifically for sponge rubber, ebonite, and O-rings (the latter often governed by JIS B 2401). Classification of Rubber Materials
The standard classifies rubber materials primarily by their physical properties and resistance to environmental factors like oil and heat:
Class A (Non-oil resistant): Typically includes materials like EPDM or Natural Rubber (NR).
Class B (Oil resistant, low swell): High-performance Nitrile Rubber (NBR) often falls here.
Class C (Oil resistant, medium swell): Often represented by Chloroprene Rubber (CR), known as Neoprene.
Class D (Extreme temperature resistance): Includes Silicone Rubber and Fluororubber (FKM/Viton). Critical Physical Properties and Testing
To ensure compliance with JIS K 6380, materials must undergo rigorous testing as outlined in related JIS standards. Key tests include: Related JIS Test Standard Importance Hardness JIS K 6253
Determines resistance to indentation using IRHD or Durometer methods. Tensile Properties JIS K 6251
Measures the stress a material can withstand before breaking. Heat Ageing JIS K 6257 jis k 6380 pdf
Evaluates how physical properties change over time at high temperatures. Oil Resistance JIS K 6258
Determines the effect of liquids (like IRM903 oil) on the rubber's volume and strength. Compression Set JIS K 6262
Measures the material's ability to return to its original shape after being compressed. Where to Obtain the PDF
Official copies of the JIS K 6380:2014 PDF are typically available through authorized standards organizations:
Japanese Standards Association (JSA): The official publisher of JIS standards.
Intertek Inform: Provides standard downloads and historical versions.
GlobalSpec: Offers detailed standard histories and documentation for industrial users. JIS K 6380:1999 Rubber packing material - Intertek Inform
JIS K 6380 is the Japanese Industrial Standard for Rubber Packing Materials, specifically defining the classification of physical properties for rubber materials used in industrial packings. Current Status and Availability
Latest Version: JIS K 6380:2014, which replaced the 1999 version.
Scope: It specifies the performance requirements for rubber materials used in industrial seals and packings, excluding sponge rubber, ebonite, and O-rings.
Testing Methods: The standard references other core rubber tests, such as: JIS K 6253: Hardness testing. JIS K 6257: Heat aging properties.
JIS K 6258: Effect of liquids (oil resistance using IRM903). PDF Resources and Technical Data
If you are looking for a PDF of the standard or technical datasheets based on it, you can refer to the following sources:
Official Purchase: Full PDF versions are generally paid documents available through the Japanese Standards Association (JSA) or distributors like Intertek Inform. JIS K 6380 isn’t flashy — but it’s
Manufacturer Summaries: Many manufacturers provide PDF catalogs that include abstracts and performance charts based on JIS K 6380:
Togawa Rubber Co.: Their Rubber Sheet Catalog includes specifications for CR, NBR, and Silicone sheets categorized by JIS K 6380 performance classes.
Tigers Polymer: Provides technical notes on rubber packing materials and their relation to JIS standards.
Reference Previews: You can view standard abstracts and classification tables on Kikakurui (Japanese language) or via document sharing sites like Scribd.
g., oil resistance or hardness levels) within this standard to match a material? JIS K 6380:1999 Rubber packing material - Intertek Inform
The JIS K 6380 standard, titled "Rubber packing material - Classification of physical properties," is a technical regulation established by the Japanese Standards Association (JSA). It provides a comprehensive classification system for rubber materials used in industrial packings and similar products. Scope and Purpose of JIS K 6380
This standard defines the performance classes and physical property requirements for vulcanized rubber materials. Its primary goal is to standardize how manufacturers and engineers categorize rubber based on its resistance to heat, oil, and mechanical stress.
Key Exclusions:While broad, JIS K 6380 explicitly excludes certain rubber forms: Sponge rubber Ebonite (hard rubber) O-rings (typically covered by JIS B 2401) Material Classifications
Industrial rubber sheets and packings are often labeled according to their corresponding JIS K 6380 performance class. Common materials categorized under this system include:
Natural Rubber (NR): Used for general-purpose industrial packing and floor mats where oil resistance is not required.
Nitrile Rubber (NBR): Highly valued for its excellent oil resistance.
Chloroprene Rubber (CR/Neoprene): Balanced for weather, heat, and flame resistance.
Silicone Rubber: Specialized for extreme temperature stability and electrical insulation.
Fluororubber (FKM): Known for superior chemical and high-temperature oil resistance. Core Testing Requirements Would you like a downloadable one-page fact sheet
To comply with JIS K 6380, materials must undergo standardized tests defined by other JIS rubber standards:
Hardness: Measured using the Durometer or IRHD methods (JIS K 6253).
Tensile Stress-Strain: Evaluates the strength and elongation of the material (JIS K 6251).
Heat Ageing: Determines how the material degrades over time at high temperatures (JIS K 6257).
Effect of Liquids: Essential for determining oil resistance levels (JIS K 6258). How to Access the PDF
The latest active version is JIS K 6380:2014, which superseded the 1999 edition. Official copies are not typically available for free due to copyright; however, they can be purchased or requested in electronic PDF format from the following sources: JIS K 6380:2014 Rubber packing material - Intertek Inform
Based on the technical specifications and industry standards associated with JIS K 6380, I have compiled a comprehensive summary of its contents.
Note: JIS K 6380 is a Japanese Industrial Standard titled "Rubber, vulcanized or thermoplastic — Determination of hardness." It is the Japanese equivalent of ISO 48-4.
Below is the structured content breakdown of the standard, organized as if reviewing the actual PDF document.
The standard sets strict guidelines for the sample preparation to ensure test accuracy.
In the world of industrial manufacturing, precision is not just a goal—it is a legal and safety requirement. For engineers working with automotive parts, hydraulic systems, or general industrial machinery, Japanese Industrial Standards (JIS) are the gold standard for quality. Among these, JIS K 6380 is a critical specification. However, finding a legitimate and current JIS K 6380 PDF can be surprisingly challenging.
If you have searched for a "jis k 6380 pdf free download" or need to understand what this standard entails, you are not alone. This article serves as your comprehensive resource. We will explain what JIS K 6380 covers, why it is vital for rubber and gasket materials, where to legally obtain the PDF, and how to interpret its key clauses.
JIS K 6380 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.
While many know SAE J517 or ISO 1436, JIS K 6380 holds unique weight in Asian manufacturing, especially for equipment destined for Japan’s domestic market or manufacturers seeking JIS certification.
The PDF outlines the specific equipment requirements: