ASTM E23 is the core set of test methods for notched-bar impact testing of metallic materials using Charpy (simple-beam) and Izod (cantilever) configurations. It defines how absorbed energy is measured to judge toughness. To match this to your program, talk with our team.
What ASTM E23 Covers
The method drops a pendulum onto a notched bar and records the energy absorbed as it fractures, a direct measure of a metal toughness and its ductile-to-brittle behaviour with temperature. Both Charpy and Izod arrangements are defined.
Specimen Notch Types
E23 specifies notched specimens, most commonly the V-notch, and sets their geometry precisely:
| Notch | Use |
|---|---|
| V-notch | The most widely specified toughness test |
| U-notch (keyhole) | Used where a legacy or specific requirement calls for it |
Why It Matters
Charpy energy underlies toughness acceptance for structural steels, pressure equipment, and pipelines, often at specified low temperatures. Accurate, verified machines and correct specimen preparation keep the numbers defensible.
Reading the Designation
Cited as ASTM E23-YY. Confirm the edition, notch type, and test temperature. To configure impact testing, request a quote.
Related Standards
ISO 148-1 is the ISO Charpy method, ASTM E2298 adds instrumentation, and ISO 148-2 verifies the machine.
Request a Quote
Setting up Charpy or Izod impact testing of metals? Request a quote and our team will help you build a system matched to your specimen type and test temperature.
TensileMill CNC products for ASTM E23
Our specimen-preparation systems and testing equipment compatible with ASTM E23:
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
Configure your ASTM E23 setup with TensileMill CNC
Adding capacity or replacing older equipment? TensileMill CNC can support your ASTM E23 program. That typically means CNC systems for flat and round impact specimen preparation with precision notching. Send us your specimen types and target standards, and we will help you spec the right system.