What else does ASTM cover?<\/h2>\n
Many times, customers will ask engineers which specification should be used for a specific rubber compound.<\/p>\n
SAE titles ASTM D2000 as the \u201cStandard Classification System for Rubber Products in Automotive Applications.\u201d<\/p>\n
Why it\u2019s necessary:<\/strong><\/h3>\nAutomotive applications: <\/strong>\u00a0 This would be a start for a good ASTM rubber guidelines.<\/p>\nIndustrial applications:\u00a0<\/strong>There are no defined standards for medical applications yet.<\/p>\nBelow is a standard line call-out for a Nitrile rubber compound.<\/p>\n
![\"ASTM](\"http:\/\/www.applerubber.com\/hot-topics-for-engineers\/wp-content\/uploads\/2015\/01\/ASTM-Call-Out.jpg\")
<\/p>\n
ASTM D2000:<\/strong>\u00a0Document name.<\/h3>\nM:<\/strong>\u00a0The letter \u201cM\u201d may or may not be present \u2013 this represents the unit of measure, which is stated in SI (metric) units. If the \u201cM\u201d was not present, English units would be used.<\/p>\n2<\/strong>: Grade number. The grade number defines specific added test requirements, which are desirable in cases where the basic requirements may not ensure an acceptable material.<\/p>\nBG:<\/strong> Type and Class. The Type is based on changes in tensile strength.<\/p>\n![\"ASTM](\"http:\/\/www.applerubber.com\/hot-topics-for-engineers\/wp-content\/uploads\/2015\/01\/ASTM-Type-and-Class1.jpg\")
<\/p>\n
Type is based on change in tensile strength after heat aging for 70 hours at a given temperature, stated below:\u00a0 Pay attention to the test temperature.<\/p>\n
![\"ASTM](\"http:\/\/www.applerubber.com\/hot-topics-for-engineers\/wp-content\/uploads\/2015\/01\/ASTM-type.jpg\")
<\/p>\n
Class is based on the resistance of the material to ASTM Oil IRM903 after a 70-hour immersion. Below shows volume swell by class:<\/p>\n
![\"ASTM](\"http:\/\/www.applerubber.com\/hot-topics-for-engineers\/wp-content\/uploads\/2015\/01\/ASTM-class.jpg\")
<\/p>\n
7:<\/strong> For standard physical properties, hardness is taken at \u00b1 5.<\/p>\nRemember, this will be in SI units if the letter \u201cM\u201d is present in the call-out. To convert to psi, simply multiply the MPa number by 145.\u00a0 This is a value worth noting. Some have Z1 and Z2 if you need to add on.<\/p>\n
Additional suffix requirements: A14B34EO14EO34F17<\/strong><\/h2>\n![\"additional\"](\"http:\/\/www.applerubber.com\/hot-topics-for-engineers\/wp-content\/uploads\/2015\/01\/additional1.png\")
<\/p>\n
A14B34EO14EO34F17 is the second half of the original sample ASTM line call-out. This would be the suffix part of the ASTM.<\/h3>\n
If the rubber part will see high temperature exposure, it is wise to add a heat resistance requirement (A). This will add a tighter tolerance on physical property change after a heat age exposure.<\/p>\n
<\/p>\n
\u00a0Special Requirements for ASTM D2000<\/strong><\/h2>\n![\"Sample](\"http:\/\/www.applerubber.com\/hot-topics-for-engineers\/wp-content\/uploads\/2015\/01\/Sample-Z-Call-Out.jpg\")
\n<\/strong><\/p>\nSpecial requirements can be added using a \u201cZ\u201d call-out. Below are a few examples that we have seen over time:<\/p>\n
Z1 \u2013 A14 Use Grade 4 requirements<\/p>\n
Z2 \u2013 Color Blue
\n(Specific Color is required for a project)<\/p>\n
Z3 \u2013 FDA 21 CFR 177.2600 complaint<\/p>\n
ASTM Tips to remember:<\/strong><\/h3>\n1) Using basic call-outs can give more robust compounds.<\/h3>\n
Calling out the compound helps build and test and repeat.\u00a0 Finding a good compound is important.\u00a0 Do not over engineer the compound.\u00a0 Keep it as simple as possible. Sometimes the geometry could help. You want to find the best mix of using the base material and modifying the formula.\u00a0 Sometimes picking the wrong base material makes it hard to change the formulation.\u00a0 Selecting the correct formulation and base material is important.\u00a0 To meet an engineered specification, this is typically the first place to start.\u00a0 Sometimes, the material can be make thicker or thinner to achieve the same performance requirement. UV rays? Oxidations?\u00a0 Sometimes material reductions can take place.\u00a0 Other times, weight reductions can take place.<\/p>\n
Sometimes a cycle testing is needed.<\/h3>\n
This can be performing over 1 million cycles. This take time and often time money.\u00a0 ARDL helps with the material side.\u00a0 You must do this in a lab setting. Do to this in China.\u00a0 CNAL is a good choice.\u00a0 You will want to test this in the environment.<\/p>\n
The best way is to use the real live test.\u00a0 Duplicate the humidity.\u00a0 Don’t do this too fast.\u00a0 This can cause problems as well.\u00a0 Keep it short and simple.\u00a0 Don’t cut corners.\u00a0 Do not take the easy way out. You want to emulate the real environment.\u00a0 This is the zone in which pricing and cost plays a role.<\/p>\n
Have a question? Please fill out the form below to receive information regarding your inquiry. You may also give us a call at (626) 965-9966<\/span>.<\/strong><\/h4>\n<\/p>\n
Industrial applications:\u00a0<\/strong>There are no defined standards for medical applications yet.<\/p>\n Below is a standard line call-out for a Nitrile rubber compound.<\/p>\n M:<\/strong>\u00a0The letter \u201cM\u201d may or may not be present \u2013 this represents the unit of measure, which is stated in SI (metric) units. If the \u201cM\u201d was not present, English units would be used.<\/p>\n 2<\/strong>: Grade number. The grade number defines specific added test requirements, which are desirable in cases where the basic requirements may not ensure an acceptable material.<\/p>\n BG:<\/strong> Type and Class. The Type is based on changes in tensile strength.<\/p>\n Type is based on change in tensile strength after heat aging for 70 hours at a given temperature, stated below:\u00a0 Pay attention to the test temperature.<\/p>\n Class is based on the resistance of the material to ASTM Oil IRM903 after a 70-hour immersion. Below shows volume swell by class:<\/p>\n 7:<\/strong> For standard physical properties, hardness is taken at \u00b1 5.<\/p>\n Remember, this will be in SI units if the letter \u201cM\u201d is present in the call-out. To convert to psi, simply multiply the MPa number by 145.\u00a0 This is a value worth noting. Some have Z1 and Z2 if you need to add on.<\/p>\n If the rubber part will see high temperature exposure, it is wise to add a heat resistance requirement (A). This will add a tighter tolerance on physical property change after a heat age exposure.<\/p>\n <\/p>\n Special requirements can be added using a \u201cZ\u201d call-out. Below are a few examples that we have seen over time:<\/p>\n Z1 \u2013 A14 Use Grade 4 requirements<\/p>\n Z2 \u2013 Color Blue Z3 \u2013 FDA 21 CFR 177.2600 complaint<\/p>\n Calling out the compound helps build and test and repeat.\u00a0 Finding a good compound is important.\u00a0 Do not over engineer the compound.\u00a0 Keep it as simple as possible. Sometimes the geometry could help. You want to find the best mix of using the base material and modifying the formula.\u00a0 Sometimes picking the wrong base material makes it hard to change the formulation.\u00a0 Selecting the correct formulation and base material is important.\u00a0 To meet an engineered specification, this is typically the first place to start.\u00a0 Sometimes, the material can be make thicker or thinner to achieve the same performance requirement. UV rays? Oxidations?\u00a0 Sometimes material reductions can take place.\u00a0 Other times, weight reductions can take place.<\/p>\n This can be performing over 1 million cycles. This take time and often time money.\u00a0 ARDL helps with the material side.\u00a0 You must do this in a lab setting. Do to this in China.\u00a0 CNAL is a good choice.\u00a0 You will want to test this in the environment.<\/p>\n The best way is to use the real live test.\u00a0 Duplicate the humidity.\u00a0 Don’t do this too fast.\u00a0 This can cause problems as well.\u00a0 Keep it short and simple.\u00a0 Don’t cut corners.\u00a0 Do not take the easy way out. You want to emulate the real environment.\u00a0 This is the zone in which pricing and cost plays a role.<\/p>\n<\/p>\nASTM D2000:<\/strong>\u00a0Document name.<\/h3>\n
<\/p>\n<\/p>\n<\/p>\nAdditional suffix requirements: A14B34EO14EO34F17<\/strong><\/h2>\n
<\/p>\nA14B34EO14EO34F17 is the second half of the original sample ASTM line call-out. This would be the suffix part of the ASTM.<\/h3>\n
\u00a0Special Requirements for ASTM D2000<\/strong><\/h2>\n
\n<\/strong><\/p>\n
\n(Specific Color is required for a project)<\/p>\nASTM Tips to remember:<\/strong><\/h3>\n
1) Using basic call-outs can give more robust compounds.<\/h3>\n
Sometimes a cycle testing is needed.<\/h3>\n
Have a question? Please fill out the form below to receive information regarding your inquiry. You may also give us a call at (626) 965-9966<\/span>.<\/strong><\/h4>\n