Class D Single-Column Charpy Impact Tester – High-Precision Pendulum Testing Machine
Metal Testing Equipment
Standards
ISO 148, EN 10045, ASTM E23, ASTM E1820, ASTM E2298, ASTM E74 (Class AA)
Description
The Class D Single-Column Charpy Impact Tester is a high-precision pendulum impact testing machine developed to perform Charpy impact testing on metals in strict compliance with international standards, including ASTM E23, ISO 148, and EN100 45. This floor-standing system is available in two primary models with maximum impact energy capacities of 450 J (332 ft-lbs) and 750 J (553 ft-lbs), covering a wide range of test requirements.
Each unit supports interchangeable pendulums rated at 150 J, 300 J, 450 J, and 600 J, offering flexibility for various energy levels. The 450 J model is commonly used in educational institutions, research laboratories, and government testing centers. The 750 J model is suited for demanding industrial applications, including aerospace, steel production, and heat treatment operations.
The system includes a fully enclosed safety frame and offers optional automation features, such as a PC-controlled specimen feeding mechanism and an integrated cooling system for testing at temperatures as low as -180°C. As a reliable and adaptable Charpy impact tester, the Class D system is ideal for laboratories and production facilities seeking to meet rigorous testing standards while enhancing efficiency and operator safety.
These systems can be configured with an automatic cooling and feeder solution that supports a streamlined, operator-friendly workflow. In simple terms, specimens can be brought down to the required test temperature using an integrated cooling solution, then automatically fed into the tester for consistent positioning and testing. This reduces manual handling, improves repeatability, and helps maintain temperature control from cooling through impact testing.
For customers looking to take automation even further, a fully automated robotic solution is also available. This option can be designed to handle end-to-end specimen handling, including loading, temperature conditioning, feeding, testing, and sorting, with minimal operator involvement. If you would like to explore a fully automated configuration, please let us know your target sample volume, specimen dimensions, and temperature requirements, and we will propose the most practical automation layout for your application.
Metals Impact Tester – Class D – Single-Column Charpy Impact Tester (Up to 750 J)
The Class D system supports impact energy levels of 150 J (111 ft-lbs), 300 J (221 ft-lbs), 450 J (332 ft-lbs), 600 J (442 ft-lbs), and 750 J (553 ft-lbs). It features both analog and digital displays for precise readings and includes an optional PC connection for advanced data processing through dedicated software.
This high-energy solution is built for long-term use, with the flexibility to incorporate automation or low-temperature testing enhancements as needed.
Learn more in our blog post on how pendulum impact testers support accurate and compliant material testing.
Single-Column Charpy Impact Tester Main Features
The Class D Single-Column Charpy Impact Tester is equipped with a comprehensive set of standard and optional features
Key features include:
- Heavy cast iron base engineered to eliminate vibrations during testing.
- Rigid single-column frame (front and rear) for enhanced structural stability in high-energy tests.
- Standard PLC-based touchscreen control system for streamlined operation.
- Digital and analog display options, with optional PC connectivity for software-based data analysis.
- Motorized pendulum lifting system with automatic return after impact.
- The electromagnetic pendulum locking mechanism ensures test security and repeatability.
- Fully enclosed impact chamber for operator protection during testing.
- Precisely calculated pendulum height and mass to ensure optimal test accuracy.
- Tool-free striker replacement system to comply with ISO and ASTM specifications.
- High-precision bearings to reduce friction and improve measurement consistency.
- Aerodynamically rounded pendulum edges to minimize wind resistance and external interference.
- Optional computer control with semi-automatic operation (manual specimen change only).
- When combined with software control, an optional automated specimen feeding system enables complete automation.
- Optional environmental cooling system for testing at temperatures as low as -180°C.
High-Precision Pendulum Testing Machine Charpy Technical Specifications
| NG-Impact Class D | ||
|---|---|---|
| Model | NG452 Class D | NG752 Class D |
| Maximum Impact Energy | 450 J | 750 J (553 ft/lbs) |
| Optional Pendulum | 150 J (111 ft/lbs), 300 J (221 ft/lbs) | 300 J (221 ft/lbs), 450 J (332 ft/lbs), 600 J (442 ft/lbs) |
| Angle Resolution | 0.025° | |
| Angle of Striking | 150° ±1° | |
| Velocity of Striker | 5.24 m/s | |
| Support Span | 40 mm | |
| Radius of Curvature of Supports | 1 mm | |
| Angle of Slope of Supports | 0° | |
| Angle of Taper of Supports | 11° ± 1° | |
| Radius of Striking Edge | 2 mm | |
| Angle of Striking Tip | 30° | |
| Width of Striking Edge | 16 mm | |
| Specimen Dimensions | 55 × 10 × 10 mm, 55 × 10 × 7.5 mm, 55 × 10 × 5 mm | |
| Overall Dimensions | 84.6 × 33.5 × 82.7 in / 215 × 85 × 210 cm | |
| Weight | 1875 lbs / 900 kg | |
| Power Consumption | 1.5 kW | |
Model-Specific Configurations and Included Components
| Name | Description | Model | |||||
|---|---|---|---|---|---|---|---|
| Machine Frame | NG452/752 Class D | NG452 D-2 | NG752 D-2 | NG452 D-3 | NG752 D-3 | NG452 D-4 | NG752 D-4 |
| Framework | Frame | X | X | X | |||
| Pendulum Lock/Release System | X | X | X | ||||
| Driving System | X | X | X | ||||
| Angle Measurement | X | X | X | ||||
| PLC | X | X | X | ||||
| Dial Gauge Display | X | X | X | ||||
| Touch Screen | X | X | X | ||||
| Motor | X | X | X | ||||
| Software | X | X | |||||
| Accessories | Span Block Specimen Centering Block Centering Tongs Standard Tools Anchor Bolts Wedge Block | X | X | X | |||
| PC Connection | RS232 | X | X | ||||
| Instrumented Impact System | Force transducer in a pendulum for quick plotting of the force-time graph Access to more testing parameters on the GenTest software | X | |||||
High-Precision Pendulum Testing Machine – Specimen Collection and Filtering Device
A motorized collection device is available to automate the removal of broken specimens following impact testing. This system prevents potential obstructions that could interfere with the striker mechanism by removing the need for manual cleaning. The unit also includes an advanced filtering function that automatically differentiates between qualified and unqualified specimens, directing them to separate collection bins for efficient post-test sorting.
Related Products
Class J - Charpy and Izod Automatic Impact Testing System - 1J - 50J
Class J is an automatic Charpy and Izod impact testing system for low-energy impact evaluation of plastics and related materials. It covers 1–50 J for Charpy tests and 1–22 J for Izod tests, with interchangeable pendulums, adjustable spans, controlled striking velocity, and ASTM D6110, ASTM D1822, ISO 179, GB/T 1043, and ISO 9854.1 support for standardized testing.
Class G Single-Column Charpy & Izod Impact Tester – High-Precision Pendulum Testing Machine
Class G is a single-column Charpy and Izod impact tester for high-precision pendulum testing of metals and engineering materials. Available in 450 J and 750 J models with optional pendulums down to 150 J, it supports ASTM E23, ISO 148, and EN 10045 workflows. PLC touchscreen control, enclosed safety guarding, motorized hammer return, interchangeable strikers, precision bearings, and optional feeding or cooling improve repeatability.
Class H - Servo-Motor Dual Column Charpy Impact Tester - 300J, 450J, 600J or 750J
Class H is a servo-motor dual-column Charpy impact tester for high-volume metal impact testing of hard materials. Available with 300 J, 450 J, 600 J, or 750 J pendulums, it supports ASTM E23, ASTM E1820, ASTM E2298, ISO 148, and EN10045 methods. A rigid cast-iron base, enclosed test area, motorized hammer return, touchscreen display, and optional instrumented striker support accurate, safe testing.
Specimen Notching/Broaching Machine
GenNotch 4000 is a motorized specimen notching and broaching machine for preparing Charpy and Izod impact specimens in metals. Its dual broaching system prepares two samples in one pass, producing V-type and U-type notches with high repeatability. Floor-standing construction, internal lubricating oil circulation, precision broaching knives, standard specimen support, and ASTM E23, ISO 148, EN10045, and DIN 50115 alignment help labs streamline impact preparation.
Impact Specimen Cooling and Heating Temperature Chamber – GenChamber
GenChamber is an impact specimen cooling and heating temperature chamber for conditioning Charpy and Izod specimens before pendulum impact testing. It provides low-temperature control from +30°C to -80°C and high-temperature control from +30°C to 100°C, with 0.1°C display resolution, PID control, forced-air circulation, specimen capacity for 60–120 standard samples, and stable preparation for standards-based impact workflows.
Impact Specimen Cooling Temperature Chamber – NG-ISCC Series
NG-ISCC Series is a low-temperature chamber for conditioning Charpy impact specimens before pendulum impact testing. Available in -60°C, -80°C, -100°C, and -196°C configurations, it uses compressor refrigeration or liquid nitrogen depending on the model. Uniform cooling, stable setpoint control, ≤ ±0.5°C accuracy, 0.01°C resolution, and ethanol-based cooling media help labs improve repeatability in ASTM E23 and ISO 148 workflows.