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. ASTM D Standard Test Method for Rubber Property—International Hardness. Buy ASTM D – 18 Standard Test Method for Rubber Property—International Hardness from SAI Global.
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Close this window and log in. For such compounds, differences in the dwell time in the two hardness tests Test Methods D and D result in differences in hardness values. However, relaxation is not the only factors at play.
ASTM D – IRHD HARDNESS
Readings may not be comparable when testing curved or irregularly shaped test specimens. Thanks Again Pat RE: It is 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. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. I think it’s like tear strength; there are several different test methods e.
Historical Version s – view previous versions of standard Translated Version s: This curve is defined as follows: It is easy to find on the web. Defense manufacturing is all about project manufacturing and project accounting.
This curve is defined as follows:. Material is NBR rubber.
Do not regsrd both as durometer. Are the results even comparable in the same scale?
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. First off, thank you for your input!
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. Historical Version s – view previous versions of standard.
Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Obviously an extreme case will be the rapid fall when unvulcanised rubber is tested.
Link to Active This link will always route to the current Active version of the standard. My understanding is that the difference can be larger for a lossy rubber such as NBR than for a more resilient rubber such as NR, but again not as high as reported here. Register now while it’s still free!
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. Click Here to join Eng-Tips and talk with other members!
I’m new to the rubber scene so any help is appreciated! D Type M micro-hardness testing Thank you atsm for the suggestion! D Type M micro-hardness testing 3 thread Forum. The hardness is obtained by the difference in penetration depth of a specified dimension ball under two conditions of contact with the rubber: Join your peers on the Internet’s largest technical engineering professional community.
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IRHD Micro Hardness Tester, ISO 48, ASTM D
Resources Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. Secondly, Wstm 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?
D Type M micro-hardness testing First off, thank you for your input! I have e1415 some O-rings tested at two different labs. 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.
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. Could anyone better explain the differences between the two? 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 Astn tests.
Asfm you an Engineering professional? Digital Transformation d11415 be defined in a number of different ways by analysts or enterprise software vendors. Red Flag This Post Please let us know here why this post is inappropriate. Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Download Now White Paper: The Eng-Tips staff will check this out and take appropriate action. If something is amiss I think it may well be with the quality of the D test. D Type M micro-hardness testing Hi, Pat.