In the world of plastics and engineering materials, impact resistance is one property that can’t be ignored. A material might look strong under slow, steady load — but the real danger comes from sudden impact. A dropped product, a snapped component, a hit during assembly, or an accidental strike on the shop floor — these real-world events can cause brittle failure if the material is not impact-resistant.
To evaluate this critical property, industries rely on the ASTM D256 Izod test, one of the most trusted global standards to measure impact strength of plastics and polymer materials. And when you need reliable, audit-ready, NABL-backed impact testing, choosing the ASTM D256 Izod test lab @ Kiyo R&D LAB gives you the accuracy and credibility your project demands.
This blog breaks down everything — what Izod impact testing is, why it matters, how the test is performed, which industries need it, and why Kiyo R&D Lab is one of the most trusted labs for Izod testing in India.

ASTM D256 Izod Test Lab @ Kiyo R&D LAB – Accurate Impact Strength Testing for Plastics & Engineering Polymers
The ASTM D256 standard defines how to measure the impact resistance of plastic materials using the Izod method. The test measures how much energy a material can absorb before it breaks when struck by a pendulum hammer.
In simple words:
It tells you how tough or brittle your material is during sudden impact.
The result is expressed in:
This single value helps engineers understand whether the material will crack, break, deform, or survive real-world sudden forces.
The ASTM D256 Izod test lab @ Kiyo R&D LAB uses calibrated equipment, controlled environment, and trained technicians to deliver highly accurate and repeatable Izod values.
Tensile strength and hardness alone do not tell the full story of material performance. A product may:
BUT still fail instantly when dropped or hit.
Examples:
This is why buyers, suppliers, and manufacturers depend on the ASTM D256 Izod test lab @ Kiyo R&D LAB — to quantify toughness accurately before material approval.
The process is scientific, precise, and executed exactly as per ASTM D256:
The notch acts like a stress concentrator, helping evaluate the weakest point of the material.
Samples are kept at controlled temperature and humidity before testing — essential for plastics, as behavior changes with moisture and temperature.
A heavy pendulum swings down and strikes the sample with defined energy.
The machine measures:
Your test report includes:
This is why industries choose ASTM D256 Izod test lab @ Kiyo R&D LAB for trusted and audit-ready results.
The Izod test is typically used for:
HDPE, LDPE, PP, PVC, ABS, PC, Nylon, PET, PBT, PMMA, etc.
Polycarbonate, glass-filled nylon, acetal, reinforced polymers.
Fiber-reinforced materials, molded composite sheets, FRP components.
Injection-molded parts, clips, housings, thin sections.
To compare toughness of different formulations.
If your material can break under impact, it can be evaluated at the ASTM D256 Izod test lab @ Kiyo R&D LAB.
Impact testing is widely demanded by:
For bumpers, trims, under-the-hood parts, clips, fasteners, dashboards, and connectors.
Switch housings, plugs, sockets, enclosures, consumer appliances.
Rigid containers, bottles, caps, lids, protective casings.
Toys, kitchen products, accessories, hardware items.
Pipes, fittings, profiles, reinforcement components.
For final-year projects and academic research using polymers and plastics.
These industries frequently rely on the ASTM D256 Izod test lab @ Kiyo R&D LAB to validate material toughness and ensure product reliability.
Here’s what makes the difference:
Accuracy that is trusted by auditors, clients, cross-functional teams, and international buyers.
Calibrated pendulum system, adjustable masses, and controlled environment.
Ensures your results are consistent with global specifications.
Ideal for urgent shipment approvals or project submissions.
Guidance on interpreting results, comparing materials, and understanding break patterns.
Perfect for comparing new formulations, assessing supplier quality, or diagnosing brittle failures.
When industries look for reliable impact testing, they often choose ASTM D256 Izod test lab @ Kiyo R&D LAB because the data is trustworthy, clean, and professionally interpreted.
A complete test report typically contains:
This makes the report fully audit-ready, perfect for supplier qualification and buyer documentation.
Toughness is one of the most misunderstood but crucial properties.
Accurate Izod impact testing helps you:
When you choose a ASTM D256 Izod test lab @ Kiyo R&D LAB, you get dependable data that directly improves product quality.

Impact strength defines how a product performs in real life — not just in controlled lab conditions. If your component snaps, cracks, or shatters upon sudden force, the entire product fails. That’s why industries rely on a professional ASTM D256 Izod test lab @ Kiyo R&D LAB to receive accurate, repeatable, NABL-aligned impact testing results.
With high-precision equipment, expert technicians, fast reporting, and deep experience in polymer and material science, Kiyo R&D Lab ensures that your product is backed by strong, dependable data — helping you build safer, tougher, and more reliable components.