Pendulum Impact Testers for Tests on Metals

The choice for impact tensile and impact bending tests on metals according ASTM E436.

  • The HIT450P pendulum impact tester can be used for Charpy, Izod, Brugger, impact tensile and wedge impact tests to all established standards like ASTM E23, ASTM E436 and BS 131. Likewise, all international standards such as ISO, DIN, EN and JIS can be tested.
  • The PSW 750 pendulum impact tester can be used for Charpy and impact tensile tests on metals to all established DIN, EN, ASTM, ISO and BS standards.
Pendelschlagwerk HIT450P und PSW750

Operating Principle of a Pendulum Impact Tester

The name "pendulum impact tester" is self explanatory for the function of the machine. A lifted mass has potential energy. This is converted to kinetic energy by the mass being subjected to a free fall. Binding the mass to a fixed pivot (pendulum) deflects the velocity vector. Impact loading of a material being tested is realized at the point of maximum kinetic energy (equal to the minimum potential energy) of the mass. This takes the form of a "flexure test".

This pendulum impact tester is used for examining the break behavior of metallic materials at impact loading. A suitable standardized specimen is loaded in the flexure test until it is completely broken. The work required is measured and is known as the energy absorbed AV. The term "notched impact strength" aK is often used, which refers to the energy absorbed AV on specimen cross-section S; it is measured in j/cm2. However, modern test methods examine the functions of the energy absorbed or the flexural force in time and/or travel (deformation of the specimen). Since thermal energy influences the notched bar impact test to a high degree, this method always depends on the temperature of the specimen. This becomes increasingly important if the temperature deviates from ambient temperature through the use of temperature conditioning devices.

Operating principle HIT450P

The HIT450P / HIT300P is a universal pendulum impact tester and can be used for a wide variety of different types of test. Modular design and comprehensive accessories make it well suited to the requirements of research, development and quality assurance.

The HIT450P / HIT300P can be used for tests to the following standards: ISO 148¬1, ASTM E23, BS131¬1, JIS Z 2242, GOST 9454¬78, DIN 50115 (withdrawn).

  • Impact bending tests on metals (Charpy, Izod – conventional and instrumented)
  • Impact tensile tests on metals
  • Brugger tests to verify the wear-behavior of transmission gears
  • Wedge impact test to determine the strength properties of structural adhesives

Key Advantages and Features HIT450P

Reliable test results

  • Reliable test results
  • Stiff components with low-friction motion
  • Test-result plausibility check via combination of electronic and analog displays

Short test cycles

  • Short test cycles
  • Fast, standard-compliant specimen insertion
  • Specimen remains can be removed selectively
  • Semi-automatic centering of Charpy specimens

Reduced operating costs

  • Reduced operating costs
  • Four-way anvils
  • Patented impact fixture
  • Tup material matched to specimen material available

Future-proof

  • Future-proof
  • Izod, Charpy, impact tensile and instrumentation possible in one instrument
  • ISO 13849-1 safety requirements are dependably satisfied

Operating principle PSW 750

The PSW 750 can be used for tests to the following standards (among others): ISO 148-1, ISO 14556, ASTM E23, JIS Z 2242, GOST 9454-78, DIN 50115 (withdrawn).

  • Impact bending tests on metals (Charpy, Izod – conventional and instrumented).
  • Impact tensile tests on metals.
  • An operational instrument comprises:
  • basic unit, electro-magnetic pendulum hammer release, electrically operated pendulum lift, electrical safety device and safety housing
  • grout and heavy-duty screw anchors
  • steel reinforcement or concrete base
  • test-specific accessories such as Charpy fixture, support, pendulum rod with hammer, tongs for Charpy specimens
  • wear parts such as anvils and tups
  • optional accessories, e.g. PC equipment, temperature-conditioning devices.

Key Advantages and Features PSW 750

Reliable test results

  • The basic unit consists of a vibration-damping stell casting, providing a high level of mechanical siffness and esuring reliable test results.
  • Operation is simple and convenient, with central controls and eays specimen instertion and pendulum release. This is particularly important for tests to ISO 148 and ASTM E 23 with temperature-conditioned specimens, as they must eb impacted 5 seconds after removal from the temperature conditioning area. Fast, convenient operation is guaranteed.

Easy handling

  • PSW 750 pendulum impact testers provide maximum protection for operator and instrument. An officially (TÜV) certified safety control system with redundant micro-controllers monitors the entire safety set-up.
  • Quick fixture and pendulum changes, coupled with straightforward access for maintenance, serving and calibration plus easy removal of specimen remains.

Future-proof

  • The PSW 750 satisfies all necessary safety requirements such as DIN 51333 and EN ISO 13489, plus additional European standards coming into force constantly, providing maximum protection for operator and instrument.

Safety Device

ZwickRoell pendulum impact testers in the HIT300 / HIT450P / PSW 750 ranges satisfy the requirements of EG Machinery Directive 2006/42/EG and of EN ISO 12100 and EN ISO 13849-1/2. This also means that the failure of an individual safety control element will not result in the loss of overall instrument safety.
The pendulum impact testers as a whole have been revised in this respect. The resulting safety device satisfies the requirements of national and international standards.

During design of the safety housing a primary consideration was ease of operation, whether during the test, during re-equipping for different specimens or types of test, or during maintenance and calibration. Centrally located controls, which (with the exception of simple visual confirmation of the function selected) also indicate operating errors, make working with these pendulum impact testers safe, simple and fast.

Front door, side door and housing recess enable:

  • easy specimen insertion
  • fast fixture and pendulum changes
  • easy access for maintenance, inspection and calibration
  • straightforward removal of specimen remains.

Safety and standards

The pendulum impact tester conforms to the following safety requirements: EC Machinery Directive 2006/42/EC, EN ISO 12100 and EN ISO 13849-1/2.

The pendulum impact tester can be used for tests to the following standards: ISO 148-1, ISO 14556, DIN 50115, ASTM E23, BS131-1, ZF 15-53, ISO 11343, JIS Z 2242, GOST 9454-78.

  • Indirect calibration:
  • as per ASTM E23 with NIST specimens in energy ranges low (14 to 20 J) and high (88 to 136 J); super high is not currently available from NIST.
  • as per ISO 148-2 with ERM or ZRM specimens in ranges low (< 20 J), medium (30 to 110 J), high (110 to 220 J) and very high (> 220 J) energy.

Pendulum impact testers and automation - a successful pairing

5:14

Charpy impact test to Charpy on metals, automated, temperature-conditioned

roboTest I with PSW750 pendulum impact tester for impact tests on metals

Technical Overview

HIT450P up to 450 J

Type

HIT450P

HIT300P

Item No.

1065598

1065601

Potential energy

450

300

J

Fall height

1.3969

1.3969

m

Impact velocity

5.23

5.23

m/s

Weight:

depending on pendulum hammer used

590 to 610

590 to 610

kg

concrete base

1600

1600

kg

safety device

90

90

kg

Dimensions, with base:

height

2450

2450

mm

width

2317

2317

mm

depth

850

850

mm

Interfaces

USB, RS 232

USB, RS 232

Electrical supply:

voltage

3 x 400

3 x 400

V

frequency

50

50

Hz

power consumption

0.5

0.5

kW

Ambient temperature

+10 to +35

+10 to +35

°C

Test results, numerical

impact energy [%], impact energy [J], impact strength [kJ/m²]

Output units

analog dial display

Pulse resolution

0.036

0.036

°

PSW 750 up to 750 J

Technical data for basic units

Type

PSW 750 AR (analog display)

PSW 750 GE (digital and analog display)

PSW 750 IR GE (instrumented tests, digital and analog display)

Item No.

003620

003618

027180

Potential energy

750

750

750

J

Impact velocity

5,42

5,42

5,42

m/s

Weight

depending on pendulum hammer used, approx.

1200

1200

1200

kg

concrete base, approx.

2200

2200

2200

kg

safety device, approx.

130

130

130

kg

Dimensions, with base

height

2734

2734

2734

mm

width

2500

2500

2500

mm

depth

1300

1300

1300

mm

Interfaces

USB, RS 232

USB, RS 232

USB, RS 232

Test results, numerical

Impact energy [%], impact energy [J]

impact energy [%], impact energy [J], impact strength [kJ/m²]

impact energy [%], impact energy [J], impact strength [kJ/m²]

Output units

Analog dial display

instrument electronics digital display, analog dial, PC[1]

instrument electronics digital display, analog dial, PC[1]

Control functions

Friction correction, pendulum vertical position, oscillation period, device data display

Correction functions

None

Air and bearing friction, kinetic yoke energy (tensile impact testing)

Air and bearing friction, kinetic yoke energy (tensile impact testing)

Pulse resolution

0,036

0,036

0,036

°

  1. If a PC with testXpert testing software is connected. The specimen dimensions are input via the PC or, for example, imported via calipers and testXpert.

Materials Testing on Radioactive Materials ("Hot Cell")

The safe operation of nuclear power plants and nuclear repositories is a key research topic all over the world. In order to ensure a high degree of safety, the materials used and real-world conditions, in this case with radioactivity, must be tested. ZwickRoell has supplied a tensile testing machine and a pendulum impact tester for an international research project.
Materials testing on radioactive materials
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