Application

The pendulum impact tester PSd 750 with a working capacity of 600 or 750 Joule corresponds to the requirements of ISO 148-2 and ASTM E23 and can be applied for:

• Notched-bar impact tests based on Charpy on steel and other metals according to ISO 148-1 as well as ASTM E23
• Instrumented Charpy impact tests according to ISO 14556 and ASTM E2298

Features

• Reliable measurement results: By applying a torsion-resistant C-hammer, vibrations caused by shattering the specimen are minimized. So, the pendulum swings almost without any vibration.
• Comfortable operation: The function friction compensation allows determining the lost work due to friction. The displayed value is subtracted from the consumed impact energy depending on the pendulum travel.
• Safety: The pendulum hammer cannot be released when the test room is open. After releasing the pendulum and opening the door, the pendulum hammer is braked immediately.

Application

The pendulum impact tester PSd 450 with a working capacity of 150, 300 or 450 Joule correspond to the requirements of ISO 148-2 and ASTM E23 and can be applied for:

• Charpy pendulum impact tests on steel and other metals according to ISO 148-1, ASTM E23 and IS 1757
• Notched-bar impact tests based on Izod according ASTM E23, BS 131 and IS 1598
• Impact tensile Tests
• Wedge impact tests according to ISO 11343
• Instrumented impact tests according to ISO 14556 and ASTM E2298

Features

• Reliable measurement results: Since it is designed as cast iron frame, vibrations are reduced to a minimum already by the frame. This is especially important when carrying out instrumented tests.
  ISO 148-2 recommends that the weight of the socle is at least the 12-fold of the pendulum weight. Thanks to the high weight of socle of the pendulum impact tester PSd 450, this recommendation is more than fulfilled.
• Flexibility in test applications: On the central anvil block, exchangeable support plates can be mounted, depending on the specimen dimensions.
• Comfortable operation: The pendulum hammer can be triggered either by pressing the start button or by closing the door. Triggering by closing the door saves time when testing cooled specimens.
• Safety: The pendulum impact tester is equipped with a complete safety enclosure with safety door according to ISO 13849-1. The sides are swivel-mounted. So, dismantling while calibrating or repairing the device is not necessary.
  
  

For Charpy impact tests, the test specimen is placed against two anvil inserts on two supports. The striker of the pendulum hammer hits the centre of the side of the test specimen which is opposite to the notch and thus breaks the specimen. The impact energy absorbed by the test specimen is measured digitally and displayed. Dividing this energy by the original cross section of the test specimen, the notch-impact strength is the result.

For the Izod impact bending test, the test specimen, which is held vertically, is ruptured as a result of the impact against the notched bar or its opposite side, while the notch root lies at the same level as the upper surface of the support. In this respect, the striker hits the test specimen at a defined distance from the notch. The notch-impact strength is calculated by dividing the absorbed impact energy by the original cross section of the test specimen at the notch.

The tensile-impact test is a tensile test with high shear rate. In this test, the energy absorbed up to the rupturing of the test specimen and the residual elongation at the break are measured. In this regard, the holder permanently connected to the anvil block is aligned the way that the pendulum hammer hits the cross yoke located at the end of the horizontally held test specimen with a striking fork when passing through the normal position. The tensile-impact strength is the impact energy absorbed by the test specimen in relation to the specimen’s smallest cross section prior to the test.

For the test based on Brugger, a specimen especially manufactured for this test is clamped the way that the contact surface of the striker meets the wide surface of the specimen fin at an angle of 30°. Mounting of the specimen must be such that during testing there is a linear contact between the upper edge of the fin and the contact face of the striker. Precaution must be taken to ensure that the shaft of the specimen can neither turn nor move in any other way during testing. The impact bending specimen is tested with an instrumented striker.