Information on the most widely used ASTM standards within the materials testing industry
Model: JBW-300B
JBW-B series impact tester is mainly used to determine the anti-impact capability of ferrous metal materials with high toughness, especially for steel and iron and their alloy, under dynamic load.
This series tester is operated semi-automatically, the pendulum of the machine can be raised or released automatically. Be applicable for continuing testing in different kinds of laboratories and other metallurgy industrial manufactories.
It is designed and developed according to standard of ISO 148-1, ASTM E23, EN 10045-1, JIS Z 2242, AASHTO T 266 etc.,
General Introduction
JBW-B series impact tester is mainly used to determine the anti-impact capability of ferrous metal materials with high toughness, especially for steel and iron and their alloy, under dynamic load.
This series tester is operated semi-automatically, the pendulum of the machine can be raised or released automatically. Be applicable for continuing testing in different kinds of laboratories and other metallurgy industrial manufactories.
It is designed and developed according to standard of ISO 148-1, ASTM E23, EN 10045-1, JIS Z 2242, AASHTO T 266 etc.,

According to ISO 148, standard specimen sizes are 10 mm × 10 mm × 55 mm. Subsize specimens are: 10 mm × 7.5 mm × 55 mm, 10 mm × 5 mm × 55 mm and 10 mm × 2.5 mm × 55mm.
ASTM E23 “Standard Test Methods for Notched Bar Impact Testing of Metallic Materials”
ISO 148 “Metallic materials -- Charpy pendulum impact test”
BS EN 10045-1 “Charpy impact test on metallic materials. Test method (V- and U-notches)”
GOST 9454 “Metals. Method for testing the impact strength at the low, room and high temperature”
Key Features
1), Pendulum rising, impact, free releasing etc. action can be controlled easily by PC mouse simple click, as well as the remote control box;
2), Safety pin guaranties the impact action, standard protection shell to avoid any accident
3), With two pendulums (big and small), digital display the energy loss, impact tenacity, rising angle, and test average value, meantime the dial scale show test result as well.
4), With two pendulums (big and small), PC software to display the energy loss, impact tenacity, rising angle, test average value etc. test data and result, also the curve display available; with calculation and report printing function. The dial scale can show test results too.
1, Windows version XP,Vista,7, 10, screen display, operation with Mouse & Keyboard;
2, Test result can export to MS Word, (2010, 2017), does not support MS Office Home Edition;
3, The software support two or more pendulums in a model, set the accurate Local Accelaration due to gravity, fall angle, pendulum length,pendulum mass or weight,to obtain a more accurate test performance;
4, Support Min,Max,Mean,Standard Deviation for batch test;
5, High precision swing period auto-detection;
6, High precision energy loss auto-detection,auto-compensation;

Main interface

Specimen Information Creating

Swing Period Detect

System parameter

Language selection
Main Technical Specification
| Model | JBW-300B (JBW-300Z) | JBW-500B (JBW-500Z) | JBW-750B (JBW-750Z) |
| Display mode | Computer | ||
| Impact energy | 300J/150J | 500J/250J | 750J |
| Distance between pendulum center to impact point | 750mm | 800mm | 750mm |
| Impact velocity | 5.2m/s | 5.4m/s | 5.24 m/s |
| Pendulum preparing angle | 150º | ||
| Span of specimen seat | 40+0.2mm | ||
| Round angle radius of Grips | R1-1.5mm | ||
| Round angle radius of striking edge | R2-2.5mm, R8±0.08mm | ||
| Angle of impact knife | 30° | ||
| Specimen size | 10 (7.5, 5, 2.5)mm*10mm*55mm | ||
| Power supply | 3 phases 4 lines, 50Hz, 380V | ||
| Weight | 600Kg | 900Kg | 2500Kg |
| *** JBW-Z series is fully automatic, with automatic sample feeding system. | |||
Main Accessories
| High Stiffness Frame | 1 set |
| Large pendulum 300J/500J | 1 set |
| Small pendulum 150J/250J | 1 set |
| Motor (on the loadframe) | 1 set |
| Rising pendulum driving device (on the loadframe) | 1 set |
| Automatic hitch pendulum device (on the loadframe) | 1 set |
| Safety pin (on the loadframe) | 1 set |
| Computer | 1 set |
| Printer | 1 set |
| Manual control box | 1 set |
| Supporting seat span adjusting device (L=40) | 1 set |
| Specimen center device ( L=40 V.U type) | 1 set |
| Safety cover | 1 set |
| Device to dismantle pendulum | 1 set |
| Terra anchor bolts (M16×300) | 1 set |
| Documents (Manual, packing list, certificate) | |
Standard
ISO 148-1 defines the method for the Charpy (V-notch & U-notch) pendulum impact test to determine the absorbed energy when a notched metallic specimen is broken by a single swinging pendulum blow. It does not cover instrumented impact testing (that belongs to ISO 14556).
ISO 148-2 specifically formulated for the verification, calibration and performance inspection of Charpy pendulum impact testing machines used in Charpy impact tests per ISO 148-1.
ISO 148-3 core focus is to establish unified rules for manufacturing, qualification, certification and proper use of Charpy V-notch reference test pieces, which are essential for the indirect verification of Charpy impact machines as required by ISO 148-2.
EN 10045‑1 regulates the Charpy simple-beam pendulum impact test for metallic materials, covering both V-notch and U-notch specimens. It defines unified rules for specimen preparation, machine requirements, operating conditions and result reporting.
ASTM E23 covers both Charpy (simple‑beam) and Izod (cantilever‑beam) notched-bar impact tests. It applies to all metallic materials for impact tests using pendulum machines.
ASTM E2248 and ISO 148-4 governs impact tests using fully miniaturized Charpy V-notch (MCVN) specimens, where all linear dimensions (length, cross-section, ligament) are proportionally reduced. It is clearly differentiated from subsize specimens specified in ASTM E23: subsize specimens retain standard length, notch geometry and surface finish while only reducing thickness, whereas MCVN specimens shrink the entire structure to maximize test quantity from limited material.
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