Izod Impact Testing (Notched Izod) is performed using ASTM D256, ISO 180 to assess Notch sensitivity in plastic materials. Notched samples of test material are evaluated for their impact toughness values required for quality control in product applications.
ASTM D256 is a standard Izod impact test that determines the resistance of material samples by hitting and breaking a notched sample with a swinging hammer. The standard test utilizes the dynamic energy needed to instigate a fracture and continue until the sample breaks. The samples must be notched as it prevents malformation such as twisting, warping, bending of samples upon the impact. Impact toughness of industry materials is critical for quality control in product applications.
The ASTM D256 test method needs a swinging pendulum hammer. The notched side of the specimen is pivoted into the test fixture, facing the impact edge of the pendulum. The pendulum or hammer is swung and allowed to hit the sample. The sample is checked for any breakage. If no breakage occurs, the weight of the hammer is increased until failure takes place. At lower temperatures, materials like thermoplastics show a much lower impact strength. For testing of such materials, temperature simulation is achieved.
Reduced Temperature Test procedure:
Test specimens are conditioned in a freezer at a specified temperature till they reach the state of equilibrium. Specimens are removed one by one from the freezer and tested. Although ASTM D256 or ISO 180 gives no specified conditioning time, typically 6 hours conditioning duration and 5 seconds freezing duration are used before impact.
ASTM D256 standard for a specimen is 64 × 12.7 × 3.2 mm (2.5 × 0.5 × 0.125 inch). The thickness of the sample commonly used is 3.2 mm (0.125 inches), but the most desirable thickness, which is less likely to crush, is 6.4 mm (approx 0.25 inches). The depth under the notch of the sample is 10.2 mm (approx 0.4 inches). ISO provides a standard multipurpose sample of Type 1A with terminated end tabs. The final test sample has dimensions of 80 × 10 × 4 mm. Under the notch, the depth of the sample is 8 mm.
Impact energy as per ASTM D256 is expressed in J/m or ft-lb/in. Calculation of Impact strength is done by dividing impact energy in J (or ft-lb) by the sample’s thickness. An average of 5 samples is taken for the result.
Impact strength as per ISO is expressed in kJ/m2. The calculation involves dividing impact energy in J by the area measured under the notch. An average of 10 samples is taken for the result.
Higher resulting numbers indicate greater toughness of the material.
ASTM D256 is a standard test method for determining the Izod Pendulum Impact Resistance of Plastics.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 is a standard test method for the analysis of sulfochromate etches solution used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
Send us a request
Process for testing
You share material and testing requirements with us
We ensure your sample pick-up in an ensured manner
We deliver test report to your inbox
Just share your testing requirements and leave the rest on us!
Free, no-obligation consultation
Quick turnaround time
Let us combine our capabilities to achieve success!!