Information on the most widely used ASTM standards within the materials testing industry
Model: JB-300B, JB-500B
JB-B Series semi-automatic impact testing machine is used to determine the ability of metallic materials to resist impact under dynamic loads, in order to assess the material's performance under such conditions. This machine automatically swings the pendulum with the remaining energy after striking the specimen, and displays the scale on the dial. It has a simple structure, is easy to operate, highly efficient, safe and reliable, and is widely used in laboratories conducting impact tests in industries such as metallurgy, machinery, aerospace, and quality supervision.
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
JB-B Series semi-automatic impact testing machine is used to determine the ability of metallic materials to resist impact under dynamic loads, in order to assess the material's performance under such conditions. This machine automatically swings the pendulum with the remaining energy after striking the specimen, and displays the scale on the dial. It has a simple structure, is easy to operate, highly efficient, safe and reliable, and is widely used in laboratories conducting impact tests in industries such as metallurgy, machinery, aerospace, and quality supervision.
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 is realized as automatically by remote control box;
2), Safety pin guaranties the impact action, standard protection shell to avoid any accident
3), Pendulum will automatically rising and ready for next impact action after specimen breakout
4), With two pendulums (big and small) and corresponding two Dial scales to read test result.
Main Technical Specification
| Model | JB-300B | JB-500B | JB-750B |
| Display mode | Dial scale display | ||
| 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 | 550Kg | 850Kg | 2400Kg |
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 |
| 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.
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