This standard is issued under the fixed designation D ; the number 1 This test method is under the jurisdiction of ASTM Committee D on Rubber. Find the most up-to-date version of ASTM D at Engineering IRHD Hardness – ASTM D IRHD: International Rubber Hardness Degrees. A measure of the indentation resistance of elastomeric or rubber materials.
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Are you an Engineering professional? Download Now The Architecture, Engineering and Construction AEC industry is constantly looking for process improvements to better manage potential project delays and costs. Resources Few production environments have the luxury of ordering new equipment to replace existing machines on their shop floor.
Red Flag This Post Please let us know here why this post is inappropriate. Historical Version s – view previous versions of standard.
ASTM D – 06 Standard Test Method for Rubber Property—International Hardness
The measured penetration is converted into IRHD, the scale of degrees being so chosen that 0 represents a material having an elastic modulus of zero, and represents a material of infinite elastic modulus.
Click Here to join Eng-Tips and talk with other members! I agree with much of tom’s comments but I am surprised that the difference between the two instruments is 10 numerical units or even greater. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: Few production environments have the luxury of ordering new equipment to replace existing machines on their shop floor.
I have had some O-rings tested at two different labs. It’s easy to join dd1415 it’s free. Such issues are the result of project complexity, size, uniqueness and regulation, as well as the need for virtual team collaboration. I’m new to the rubber scene so any help is appreciated! Close this window and log in. After reading the ASTM sections the only differences I can come up with are the time dependency and the actual test apparatus. The Architecture, Engineering and Construction AEC industry is constantly looking for process improvements to better manage potential project delays and costs.
I think it’s like tear strength; there are several different test methods e.
This curve is defined as follows: For such 1d415, differences in the dwell time in the two hardness tests Test Methods D and D result in differences in hardness values.
Link to Active This link will always route to the current Active version of the standard. D Type M micro-hardness testing First off, thank you for your input! Do not regsrd both as durometer.
It d14115 the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The differential penetration is taken at a specified time and converted to a hardness scale value. If d14115 is amiss I think it may well be with the quality of the D test.
Material is NBR ast. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. Cobbold Both H W Wallace. Join your asgm on the Internet’s largest technical engineering professional community. Secondly, Since method D shows both samples to be 70 durometer could the varying results using method D be caused by a difference in compression set, since the method is dependent on time?
Morgans University of Greenwich. D Type M micro-hardness testing Thanks Tom for the insight! D Type M micro-hardness testing 3. The Eng-Tips staff will check this out and take appropriate action.
D Type M micro-hardness testing ” Are the results even comparable in the same scale? Thank you for helping keep Eng-Tips Forums free from inappropriate posts. If something is amiss I think it may well be with the quality of the D test RE: D Type M micro-hardness testing Thank you stancom for the suggestion!
D Type M micro-hardness testing I agree with much of tom’s comments but I am surprised that the difference between the two instruments is 10 numerical units or even greater.
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Students Click Here Join Us! Material 1 and Material 2 should be the same.
IRHD Hardness – ASTM D1415
Register now while it’s still free! Reasons atm as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. This curve is defined as follows:. Thanks Again Pat RE: I think it depends on what what specification or requirements you’re trying to meet, or what the customer wants. D Type M micro-hardness testing Hi, Pat. In my experience, admittedly with the normal test, the difference ought not to exceed 5 units or so even when we recognise the underlying difference in durometer and International Rubber Hardness tests.
Readings may not be comparable when testing curved or irregularly v1415 test specimens. The tip of the indentor takes some time to settle into the depression it makes, eg overcoming drag forces – which one reason for the application of a solid lubricant, usually talc. By joining you are opting in to receive e-mail. The hardness is obtained by the difference in penetration depth of a specified dimension ball under two conditions of contact aztm the rubber: