JIS K 6253 Standard PDF: A Comprehensive Guide to Rubber Hardness Measurement
JIS K 6253 Standard PDF: A Comprehensive Guide to Rubber Hardness Measurement
Rubber hardness is one of the most important physical properties of rubber products, as it affects their performance, durability, and quality. Rubber hardness is defined as the resistance of rubber to indentation by a standard indenter under a specified force and time. Rubber hardness can be measured by various methods, such as durometer, IRHD (International Rubber Hardness Degree), and microhardness.
Jis K 6253 Standard Pdf
JIS K 6253 is a Japanese Industrial Standard that specifies the testing methods to measure hardness of vulcanized rubber and thermoplastic rubber. JIS K 6253 consists of five parts:
Part 1: General guidance
Part 2: IRHD dead-load method
Part 3: Durometer method
Part 4: IRHD pocket meter method
Part 5: Calibration and verification of hardness testers
This article will provide a comprehensive guide to JIS K 6253 standard PDF, covering its scope, principles, procedures, and applications.
Scope of JIS K 6253 Standard PDF
JIS K 6253 standard PDF applies to vulcanized rubber and thermoplastic rubber with hardness values between 10 and 100 IRHD or durometer units. It does not apply to ebonite or similar hard materials, cellular rubber or plastics, or rubber-coated fabrics.
JIS K 6253 standard PDF is intended to provide types of determination methods of hardness of vulcanized rubber and thermoplastic rubber, and assist in the selection of an appropriate method. It also specifies the general rules for determination of the hardness of vulcanized rubber and thermoplastic rubber, such as sampling, conditioning, test pieces, test conditions, and expression of results.
JIS K 6253 standard PDF is based on ISO 18517:2005 Rubber, vulcanized or thermoplastic-Hardness testing-Introduction and guide, with some modifications. It also corresponds to the following International Standards:
ISO 48:1994 Rubber, vulcanized or thermoplastic-Determination of hardness (hardness between 10 IRHD and 100 IRHD)
ISO 7619-1:2010 Rubber, vulcanized or thermoplastic-Determination of indentation hardness-Part 1: Durometer method (Shore hardness)
ISO 21509:2008 Rubber-Determination of indentation hardness by means of pocket hardness meters
ISO 18898:2004 Rubber-Determination of indentation hardness by means of IRHD pocket meters
ISO 18899:2004 Rubber-Calibration and verification of hardness testers
Principles of JIS K 6253 Standard PDF
JIS K 6253 standard PDF specifies two main types of hardness measurement methods: IRHD and durometer. Both methods are based on the principle of measuring the depth of indentation by a standard indenter under a specified force and time. However, they differ in the shape and size of the indenter, the applied force and time, and the scale of hardness values.
The IRHD method uses a spherical indenter with a diameter of 2.50 mm for normal-hardness measurements (N), or 0.79 mm for micro-hardness measurements (M). The applied force is 5.4 N for N scale, or 0.306 N for M scale. The indentation depth is measured after a contact time of 30 s for both scales. The IRHD value is calculated from the indentation depth using a formula that takes into account the elastic properties of rubber.
The durometer method uses a conical indenter with an angle of 35 and a spherical tip with a radius of 0.79 mm for type A scale, or an angle of 30 and a spherical tip with a radius of 0.25 mm for type D scale. The applied force is about 8.1 N for type A scale, or about 44.5 N for type D scale. The indentation depth is measured after a contact time of about 1 s for both scales. The durometer value is read directly from a dial gauge that indicates the percentage
JIS K 6253 Standard PDF: A Comprehensive Guide to Rubber Hardness Measurement
Rubber hardness is one of the most important physical properties of rubber products, as it affects their performance, durability, and quality. Rubber hardness is defined as the resistance of rubber to indentation by a standard indenter under a specified force and time. Rubber hardness can be measured by various methods, such as durometer, IRHD (International Rubber Hardness Degree), and microhardness.
JIS K 6253 is a Japanese Industrial Standard that specifies the testing methods to measure hardness of vulcanized rubber and thermoplastic rubber. JIS K 6253 consists of five parts:
Part 1: General guidance
Part 2: IRHD dead-load method
Part 3: Durometer method
Part 4: IRHD pocket meter method
Part 5: Calibration and verification of hardness testers
This article will provide a comprehensive guide to JIS K 6253 standard PDF, covering its scope, principles, procedures, and applications.
Scope of JIS K 6253 Standard PDF
JIS K 6253 standard PDF applies to vulcanized rubber and thermoplastic rubber with hardness values between 10 and 100 IRHD or durometer units. It does not apply to ebonite or similar hard materials, cellular rubber or plastics, or rubber-coated fabrics.
JIS K 6253 standard PDF is intended to provide types of determination methods of hardness of vulcanized rubber and thermoplastic rubber, and assist in the selection of an appropriate method. It also specifies the general rules for determination of the hardness of vulcanized rubber and thermoplastic rubber, such as sampling, conditioning, test pieces, test conditions, and expression of results.
JIS K 6253 standard PDF is based on ISO 18517:2005 Rubber, vulcanized or thermoplastic-Hardness testing-Introduction and guide, with some modifications. It also corresponds to the following International Standards:
ISO 48:1994 Rubber, vulcanized or thermoplastic-Determination of hardness (hardness between 10 IRHD and 100 IRHD)
ISO 7619-1:2010 Rubber, vulcanized or thermoplastic-Determination of indentation hardness-Part 1: Durometer method (Shore hardness)
ISO 21509:2008 Rubber-Determination of indentation hardness by means of pocket hardness meters
ISO 18898:2004 Rubber-Determination of indentation hardness by means of IRHD pocket meters
ISO 18899:2004 Rubber-Calibration and verification of hardness testers
Principles of JIS K 6253 Standard PDF
JIS K 6253 standard PDF specifies two main types of hardness measurement methods: IRHD and durometer. Both methods are based on the principle of measuring the depth of indentation by a standard indenter under a specified force and time. However, they differ in the shape and size of the indenter, the applied force and time, and the scale of hardness values.
The IRHD method uses a spherical indenter with a diameter of 2.50 mm for normal-hardness measurements (N), or 0.79 mm for micro-hardness measurements (M). The applied force is 5.4 N for N scale, or 0.306 N for M scale. The indentation depth is measured after a contact time of 30 s for both scales. The IRHD value is calculated from the indentation depth using a formula that takes into account the elastic properties of rubber.
The durometer method uses a conical indenter with an angle of 35 and a spherical tip with a radius of 0.79 mm for type A scale, or an angle of 30 and a spherical tip with a radius of 0.25 mm for type D scale. The applied force is about 8.1 N for type A scale, or about 44.5 N for type D scale. The indentation depth is measured after a contact time of about 1 s for both scales. The durometer value is read directly from a dial gauge that indicates the percentage
JIS K 6253 Standard PDF: A Comprehensive Guide to Rubber Hardness Measurement
Rubber hardness is one of the most important physical properties of rubber products, as it affects their performance, durability, and quality. Rubber hardness is defined as the resistance of rubber to indentation by a standard indenter under a specified force and time. Rubber hardness can be measured by various methods, such as durometer, IRHD (International Rubber Hardness Degree), and microhardness.
JIS K 6253 is a Japanese Industrial Standard that specifies the testing methods to measure hardness of vulcanized rubber and thermoplastic rubber. JIS K 6253 consists of five parts:
Part 1: General guidance
Part 2: IRHD dead-load method
Part 3: Durometer method
Part 4: IRHD pocket meter method
Part 5: Calibration and verification of hardness testers
This article will provide a comprehensive guide to JIS K 6253 standard PDF, covering its scope, principles, procedures, and applications.
Scope of JIS K 6253 Standard PDF
JIS K 6253 standard PDF applies to vulcanized rubber and thermoplastic rubber with hardness values between 10 and 100 IRHD or durometer units. It does not apply to ebonite or similar hard materials, cellular rubber or plastics, or rubber-coated fabrics.
JIS K 6253 standard PDF is intended to provide types of determination methods of hardness of vulcanized rubber and thermoplastic rubber, and assist in the selection of an appropriate method. It also specifies the general rules for determination of the hardness of vulcanized rubber and thermoplastic rubber, such as sampling, conditioning, test pieces, test conditions, and expression of results.
JIS K 6253 standard PDF is based on ISO 18517:2005 Rubber, vulcanized or thermoplastic-Hardness testing-Introduction and guide, with some modifications. It also corresponds to the following International Standards:
ISO 48:1994 Rubber, vulcanized or thermoplastic-Determination of hardness (hardness between 10 IRHD and 100 IRHD)
ISO 7619-1:2010 Rubber, vulcanized or thermoplastic-Determination of indentation hardness-Part 1: Durometer method (Shore hardness)
ISO 21509:2008 Rubber-Determination of indentation hardness by means of pocket hardness meters
ISO 18898:2004 Rubber-Determination of indentation hardness by means of IRHD pocket meters
ISO 18899:2004 Rubber-Calibration and verification of hardness testers
Principles of JIS K 6253 Standard PDF
JIS K 6253 standard PDF specifies two main types of hardness measurement methods: IRHD and durometer. Both methods are based on the principle of measuring the depth of indentation by a standard indenter under a specified force and time. However, they differ in the shape and size of the indenter, the applied force and time, and the scale of hardness values.
The IRHD method uses a spherical indenter with a diameter of 2.50 mm for normal-hardness measurements (N), or 0.79 mm for micro-hardness measurements (M). The applied force is 5.4 N for N scale, or 0.306 N for M scale. The indentation depth is measured after a contact time of 30 s for both scales. The IRHD value is calculated from the indentation depth using a formula that takes into account the elastic properties of rubber.
The durometer method uses a conical indenter with an angle of 35 and a spherical tip with a radius of 0.79 mm for type A scale, or an angle of 30 and a spherical tip with a radius of 0.25 mm for type D scale. The applied force is about 8.1 N for type A scale, or about 44.5 N for type D scale. The indentation depth is measured after a contact time of about 1 s for both scales. The durometer value is read directly from a dial gauge that indicates the percentage
Conclusion
JIS K 6253 standard PDF is a useful reference for measuring the hardness of vulcanized rubber and thermoplastic rubber. It provides general guidance and specific methods for different types of hardness measurement, such as IRHD and durometer. It also specifies the calibration and verification of hardness testers. JIS K 6253 standard PDF is based on ISO standards and is compatible with international practices. By following JIS K 6253 standard PDF, one can obtain reliable and accurate results of rubber hardness measurement. a27c54c0b2
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