Information on the most widely used ASTM standards within the materials testing industry
Model: JBW-300H
JBW-H series instrumented impact tester is adopts advanced foreign technology and cooperate with China National Engineering & Physical research institute to developed a new products. Instrumented impact tester is measuring the impact value, collect and analysis the impact process data, figure energy curve, then supply details data for engineers to study and analysis material character. Through the force sensor (range 0-40KN) and the intelligent data acquisition system, the force-time curve of the impact process can be collected in real time.
The impact testing machine commonly referred to is the Charpy notch impact testing machine, which operates on the principle of the pendulum impact testing machine, with its counterpart being the drop weight impact testing machine. As electronic technology has advanced and materials science has progressed, the testing requirements for various new materials have become increasingly stringent, leading to the emergence of oscillographic impact testing machines, also known as instrumental impact testing machines, which essentially reflect the dynamic tearing process of materials. The oscillographic impact testing machine system is the world's most precise dynamic load measurement system. By using strain gauges, the instrumental impact hammer measures the force applied during the impact process, offering multiple advantages, the most important of which is determining force and energy. For the pendulum impact testing machine, energy is determined through a photoelectric encoder and independently using the oscillographic impact hammer. In addition to measuring energy, other data can also be obtained (i.e., data beyond absorbed energy), such as characteristic load, deflection, and energy.
This impact tester is mainly consist of automatically high and low temperature device (optional), auto-feeding system, and impact tester load frame, can be used test, analysis the accuracy material anti-impact performance. Tester is controlled by computer, rising pendulum, hang pendulum, impact, stop all controlled by PC.
General Introduction
JBS-300B Pendulum impact testing machine features an electric pendulum lift that automatically returns after impact, making it particularly suitable for batch and continuous testing. The main unit is designed strictly in accordance with the national standard GB/T3808-2002 "Inspection of Pendulum Impact Testing Machines" and conducts impact tests on metal materials according to the national standard "Charpy Impact Test Method for Metals."
The test specimen has a cross-section of 10×10mm and is mainly used for testing ferrous metals, especially steel and its alloys, with relatively high impact toughness. This machine uses a cantilever beam structure to enhance the rigidity of the impact tester, ensuring the accuracy of test data and significantly extending the service life of the machine.
The machine is equipped with an axial positioning device, offering advantages such as simple specimen placement, high operational efficiency, high positioning accuracy, and reliable readings, making it particularly suitable for conducting cold impact tests in conjunction with an impact test low-temperature tank. The machine operates on a three-phase, four-wire 380V power supply.
It is designed and developed according to standard of ISO148, ASTM E23.

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 “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), Comply with GB/T19748-2005, ISO 14556 : 2000(E), ASTM E23 etc.;
2), Loadframe base and leading column integrated design, overall process, with high stiffness, and improve test stability;
3), Impact axis adopt Charpy type, reasonable the radial direction load, maximum decrease energy loss caused by the bearing friction;
4), Adopt two level standard deceleration motor to rise the pendulum, rising and hang pendulum adopt hydraulic buffer to smooth the action.
5), Pendulum is round shape swing type, ensure the strike center accuracy, and precision pendulum moment;
6), Can achieve parameter of Impact velocity, impact time, impact energy, absorb energy, displacement, crack forming energy, crack extension energy, yield load, yield time, peak load, time of peak load, displacement of peak load, energy of peak load, unstable crack extension start load, unstable crack extension stop load, unstable crack extension start energy etc.
7), Working principle: through the angle displacement sensor to measure pendulum pre-rising angle and rising angle after break specimen, then obtain tester impact energy and remain energy after specimen break, and supply each sampling point velocity parameter; pendulum impact break the specimen at one time, the load sensor will measure the load changement during this period, and figure the load-time curve. Through software analysis load-displacement and other data, to help customer study the specimen deformation and breakage character;
8), Safety pin; and all close safety cover.
1), Software main interfcace include 5 parts: Headline, Function key, test information, figure indication, key data zone;
2), Function key area include: Test, rising pendulum, release pendulum, calibration, Zero, rising angle, sensor choosing, data storage, test report etc.;
3), Test information area include: date, test condition, specimen number, standard, blade radius etc.;
4), Key data and figure indication area is at middle of the interface, choose certain curve name, can show relative wave figure, and key test data. Underside is operation key, like readout, coordinate indication, zoom in, zoom out, etc., Key data include impact velocity, impact time, impact energy, absorb energy, displacement, crack generation energy and so on.
![]() | ![]() |
1). Operating Language Model: Chinese/English, switch freely between Chinese and English except Print interface
2). Automatic taking pendulum: first time taking pendulum by hand, after taking pendulum, the impact tester will taking pendulum again. The display area will display test result when each testing is finished. In groups of three tests, One group is finished, the average value of three impact tests can be available. New group test will be done after restarting
3). Store function: 100 test data will be stored, including test name, original test value, average value, test time etc
4). Print function: the present data and past data can be stored by USB, invented print the picture
5). Alarming functions: when the impact tester have trouble, touch screen will display and provide handing method.
![]() | ![]() |
| Test result interface | Main interface |
ASTM E23 “Standard Test Methods for Notched Bar Impact Testing of Metallic Materials”
ISO 14556 “Steel -- Charpy V-notch pendulum impact test -- Instrumented test method”
GB/T19748 etc.,
Main Technical Specification
| Model | JBW-H |
| Impact energy | 150J/300J/450J/600J/750J |
| Distance between pendulum center to impact point | 750mm |
| Impact velocity | 5.24m/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 |
| Impact blade thickness | 16mm |
| Angle of impact knife | 30° |
| Specimen size | 10mm*10mm*55mm |
| Load sensor accuracy | ≤±1﹪FS |
| Angle displacement resolution | 0.1° |
| Lower temperature mode | Liquid nitrogen |
| Higher temperature mode | Heating wire |
| Sample box capacity | 6 pcs, uniform 4 pcs |
| High and low temperature | Available and Optional |
| Sample Feeding system | can store 20 pcs sample at one time |
| Power supply | 3 phases 4 lines, 50Hz, 380V |
Main Accessories
| High Stiffness Frame | 1 set |
| Impact pendulum | 1 set |
| Small pendulum | 1 set |
| R2, R8 impact blade edge (with 50KN force transducer) | 1 set |
| Electric operation panel | 1 set |
| Automatic hitch pendulum device (on the loadframe) | 1 set |
| Safety pin (on the loadframe) | 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) | |
What's the difference between general impact test and instrumented impact test?
Traditional Charpy impact tests only measure the energy required for the specimen to rupture, but they do not provide a failure mechanism or cause the finished product to fail. Instrumented impact tests provide curves generated by high-speed stress-strain data, through which they can distinguish between toughness and brittle failure, as well as the energy that causes cracks and the energy transferred, and can also give many graphs expressing the subtle differences in the toughness of the specimen. Nowadays, more and more products involve reliability testing, which promotes the development of impact testing in the direction of instrumented impact.
According to standards:
ISO 14556:2000 "Steel-Charpy V-notch pendulum impact test-Instrumented test method"; GB/T19748-2005 "Instrumental Test Method for Impact Test of Charpy V-Notch Pendulum for Steel";
GB/T3808-2002 "Inspection of Pendulum Impact Tester";
GB/T229-2007 "Impact Test Method for Metal Charpy Notch";
GB/T18658 "Standard Specimen of Charpy V-Notch for Pendulum Impact Tester";
ASTM E23
Require More Customized Solutions?