ASTM D412 Vulcanized Rubber and Thermoplastic Elastomers Tension
ASTM D412 test methods determine the tensile properties of vulcanized thermostat rubbers and thermoplastic elastomers. ASTM D412 methods are not applicable to hard and low elongation materials such as ebonite. ASTM D412 comprises Test Method A for Dumbbell and Straight Section Specimens and Test Method B for Cut Ring Specimens. Read more about ASTM D412, ISO 37 Vulcanized Rubber and Thermoplastic Elastomers Tension below.
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Introduction to ASTM D412
ASTM D412 is a set of test methods designed to measure the tensile properties of vulcanized thermostat rubbers and thermoplastic elastomers. An index of the performance of rubber and elastomeric materials along with the quantitative measure of the elongation or change in length are provided by this test method. The results obtained are specially used for quality control and specification purposes. ASTM D412 comprises Test Method A for Dumbbell and Straight Section Specimens and Test Method B for Cut Ring Specimens. During its manufacture, an elastomeric material can be either a thermoplastic that exists in a solid state, or it could be a thermoset requiring vulcanization using sulfur. A successful ASTM D412 test gives ultimate tensile strength and elongation at break data along with Young’s modulus, offset yield, and the modulus of elasticity for elastomer specimens.
ASTM D412 test methods are generally applicable to thermostat rubbers and thermoplastic elastomers but not applicable to ebonite and similar hard, low-elongation materials. MaTestLab has the best network of testing labs in the USA to carry out ASTM D412 test for our clients.
ASTM D412 Test Method
This test method proceeds with preparing the sample and testing the specimens. The specimens are placed in the grips of the testing machine in such a way that the tension is uniformly distributed over the cross-section. The machine is then started and the distance between the benchmarks is noted. The force at the time of elongation and at the time of rupture is recorded. Spark mechanism, autographic mechanism or an extensometer is used to measure the elongation.
Test Method-A
This method is applicable for dumbbell and straight-section specimens. There are a total of six types of such specimens. The tensile set and set after the break are determined by accessing the distance between the benchmarks.
Test Method-B
This method is applicable for cut ring specimens. There are two cut ring specimens. The surface of the spindle is lubricated with mineral oil or silicone oil. The distance between the spindle centers is calculated and adjusted before and during the operation of the test machine. The elongation and tensile strength are recorded at rupture. For temperatures above room temperature, the specimens are preheated and cooled, which are then placed in the test chamber for measurements.
ASTM D412 Specimens
Specimen details
ASTM D412 specimens are in the shape of dumbbells, rings, or straight pieces of uniform cross-sectional area.
Specimen dimensions
The size of the specimen type used will be determined by the material, test equipment, and the sample or piece available for test. The general sample thickness for ASTM D412 is 3.0 ± 0.3mm.
Specimen preparation
Specimens are injection molded or cut from molded or extruded sheets or plates.
ASTM D412 Results
This test method evaluates tensile properties such as tension, tensile stress, tensile strength, yield point, and the ultimate elongation of vulcanized rubber from the thermoplastic elastomers. Tensile properties are highly dependent on the material formulation and test conditions including variables such as test speed, temperature, humidity, specimen geometry, and pretest conditioning.
Tests Related to ASTM D412
ISO 37 is similar to the ASTM D412 test method. ISO specifies a method for determining the tensile stress/strain properties of vulcanized and thermoplastic rubbers. The properties which can be determined are tensile strength, elongation at break, stress at a given elongation, elongation at a given stress, stress at yield, and elongation at yield.
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Please contact us for a detailed quote for your astm d412 testing needs. Cost incurred to carry out different astm d412 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm d412?
The required number of samples or specimens should comply with the procedure given in the astm d412 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm d412 test?
The turnaround time for astm d412 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm d412 tested?
You can share your astm d412 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d412 test to various testing techniques.
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