W+B PH Series Pendulum Impact Testing Machine

Overview

The W+B PH Series Pendulum Impact Testing Machine is a precision-engineered mechanical testing system designed for standardized Charpy and Izod impact testing of metallic and polymeric materials. Operating on the classical principle of gravitational potential energy conversion—where a calibrated pendulum is raised to a defined height and released to fracture a notched specimen—the PH series delivers high reproducibility in absorbed energy measurement under controlled boundary conditions. Its robust cast-iron frame, precision-machined pivot bearings, and dynamically balanced pendulum arm ensure minimal energy loss due to friction or vibration, meeting the stringent mechanical stability requirements of ISO 148-1:2016, ASTM E23-22, and EN ISO 10045-2. The machine supports both uninstrumented (energy-only) and instrumented (force-time history + energy) test modes, enabling compliance with both basic qualification protocols and advanced fracture mechanics analysis workflows.

Key Features

• Fixed-energy configuration with nominal impact energy of 750 J, optimized for high-toughness structural steels, weldments, and heavy-section polymers.
• Pendulum arm engineered with a certified impact constant of 241.1543 N·m, traceable to national metrological standards and validated per ISO 148-2 Annex B.
• Consistent impact velocity of 5.4 m/s at the point of specimen contact—maintained across all energy settings via geometric pendulum design and rigid release mechanism.
• Maximum specimen lifting height of 50 mm ensures full engagement of standard Charpy V-notch (10 × 10 × 55 mm) and Izod specimens without interference.
• Modular sensor interface supporting optional high-frequency force transducers (up to 1 MHz sampling), enabling full load–deflection curve acquisition and crack initiation energy calculation.
• Mechanically interlocked safety guard with position-sensing switch halts operation if opened during pendulum swing—compliant with EN ISO 12100:2019 risk assessment requirements.

Sample Compatibility & Compliance

The PH Series accommodates standardized Charpy (ISO 148-1, ASTM E23) and Izod (ISO 180, ASTM D256) specimens—including full-size (10 mm), sub-size (7.5 mm, 5 mm, 2.5 mm), and pre-cracked variants—as well as custom geometries within dimensional envelope constraints (max. 55 mm length × 12 mm width × 12 mm thickness). All test configurations are validated against international reference materials (e.g., NIST SRM 2823, BAM Reference Steel Samples) to ensure measurement traceability. The system meets essential requirements for GLP-compliant laboratories, including mechanical calibration documentation, periodic verification procedures per ISO/IEC 17025:2017 Clause 6.5, and compatibility with audit-ready test record generation.

Software & Data Management

While the base PH configuration operates in analog mode with mechanical angle readout and digital energy display, it integrates seamlessly with W+B’s optional IMPACT-Soft v5.x software suite. This Windows-based application supports real-time force–time acquisition, automatic notch depth validation (via integrated optical alignment module), and automated report generation compliant with ASTM E23 Appendix X3 and ISO 148-3 reporting templates. All raw data files (.idf binary format) include embedded metadata (operator ID, calibration certificate ID, environmental temperature/humidity stamps) and support FDA 21 CFR Part 11–compliant electronic signatures when deployed on validated networked workstations.

Applications

• Quality control of pressure vessel steels, offshore pipeline girth welds, and nuclear-grade alloys per ASME BPVC Section IX and EN 10228-4.
• Toughness qualification of cryogenic materials (e.g., ASTM A333 Gr.6) tested at −196 °C using auxiliary low-temperature chambers.
• Research into ductile-to-brittle transition temperature (DBTT) shifts in irradiated reactor materials and thermally aged polymers.
• Validation of heat treatment parameters (quenching severity, tempering time) through systematic impact energy vs. microstructure correlation studies.
• Failure analysis laboratories requiring repeatable fracture surface characterization via synchronized high-speed imaging (optional trigger output).

FAQ

What standards does the PH Series fully comply with for Charpy testing?
The PH Series is designed and verified to meet the mechanical and procedural requirements of ISO 148-1:2016, ASTM E23-22, and EN ISO 10045-2 for uninstrumented and instrumented Charpy impact testing.
Can the PH machine be upgraded to perform instrumented impact testing post-purchase?
Yes—retrofit kits including calibrated force sensors, signal conditioning modules, and IMPACT-Soft licensing are available directly from W+B authorized service centers.
Is calibration certification included with delivery?
Each PH unit ships with a factory-issued calibration certificate covering pendulum geometry, impact velocity verification, and energy scale linearity—traceable to METAS (Swiss Federal Institute of Metrology).
What maintenance intervals are recommended for long-term accuracy?
W+B recommends biannual verification of pivot bearing play, knife-edge wear, and anvil alignment per ISO 148-2 Annex C; full recalibration every 24 months or after 5,000 test cycles.
Does the system support integration into a laboratory information management system (LIMS)?
Yes—IMPACT-Soft provides configurable ASCII and XML export formats compatible with major LIMS platforms, including LabWare, STARLIMS, and Thermo Fisher SampleManager.