ASTM D256 is the set of test methods for the pendulum (Izod) impact resistance of notched plastics, the most widely used plastics impact test in North America. To match this to your program, talk with our team.
What ASTM D256 Covers
It defines the Izod cantilever arrangement and several method variants for notched plastics, measuring the energy to break the specimen and characterizing notch sensitivity.
Why It Matters
Izod impact is a standard quality and comparison metric for plastic compounds and moldings; consistent notching is essential because plastics are highly notch-sensitive.
Reading the Designation
Cited as ASTM D256 with its edition year. Confirm the edition and the specimen or notch requirements before finalizing fixtures and reporting. To configure an impact setup, request a quote.
Related Standards
ISO 180 is the ISO Izod method for plastics and GB/T 1843 is the Chinese Izod method.
Request a Quote
Setting up Izod impact testing of plastics? Request a quote and our team will help you build a system matched to your material type and notch requirements.
TensileMill CNC products for ASTM D256
Our specimen-preparation systems and testing equipment compatible with ASTM D256:
TensileMill CNC – Classic Upgrade
Classic Upgrade – Flat Tensile & Impact Specimen Preparation
TensileTurn CNC – Industrial Upgrade – Round Tensile Sample Preparation Machine
Industrial Upgrade – Round Tensile Sample Preparation
Get ready for ASTM D256 with TensileMill CNC
TensileMill CNC helps labs run ASTM D256 with repeatable, audit-ready results. That typically means CNC systems for flat and round impact specimen preparation with precision notching. Tell us your materials, specimen forms, and required test sections, and our team will match the right configuration.