YANRUN JB-300B Semi-Automatic Charpy Impact Testing Machine
| Brand | YANRUN |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Model | JB-300B |
| Impact Energy | 150 J / 300 J |
| Impact Velocity | 5.2 m/s |
| Compliance | GB/T 229-2007, GB/T 3803-2002 |
| Display Type | Analog Dial Gauge |
| Control Mode | Semi-Automatic (Electromechanical Pendulum Release & Auto-Reset) |
Overview
The YANRUN JB-300B is a semi-automatic pendulum-type Charpy impact testing machine engineered for standardized determination of the notched impact toughness of metallic materials at room temperature. It operates on the principle of gravitational potential energy conversion: a calibrated pendulum of known mass and length is raised to a fixed height, then released to strike a standardized notched specimen supported in a three-point bending (simply supported beam) configuration. The energy absorbed during fracture—calculated from the difference between initial and residual pendulum heights—is directly indicated on a precision analog dial gauge. Designed in accordance with ISO 148-1:2016 (equivalent to GB/T 229-2007) and verified per GB/T 3803-2002 for machine classification and metrological performance, the JB-300B delivers high reproducibility for routine quality control and incoming material verification in metallurgical, heavy machinery, and structural component manufacturing environments.
Key Features
- Robust single-column monolithic frame with cantilevered pendulum suspension—optimized for rigidity and minimal energy loss during impact.
- U-shaped pendulum hammer body with precisely machined impact edge geometry, ensuring consistent stress concentration at the specimen notch root.
- Quick-change impact blade secured via threaded fasteners—enabling tool-free replacement and traceable blade calibration without realignment.
- Standardized anvil and support spacing (40 mm ± 0.2 mm) compliant with Charpy V-notch and U-notch specimen geometry per GB/T 229-2007 and ISO 148-1.
- Integrated mechanical safety pin and full-coverage polycarbonate safety enclosure—meeting mandatory operator protection requirements for Class II impact testers.
- Semi-automatic electromechanical control system: motor-driven lifting, solenoid-triggered release, and post-fracture automatic re-cocking using residual swing energy—reducing cycle time and operator intervention in high-throughput labs.
Sample Compatibility & Compliance
The JB-300B accommodates standard Charpy specimens measuring 10 mm × 10 mm × 55 mm (square cross-section), including V-notch (2 mm depth, 45° angle) and U-notch (5 mm radius, 2 mm depth) configurations. Specimen alignment is ensured by precision-ground support anvils and centering guides. All mechanical tolerances—including pendulum axis alignment, anvil parallelism, and striker radius (2–2.5 mm)—are validated against GB/T 3803-2002 verification criteria. The instrument satisfies essential requirements for ISO/IEC 17025-accredited testing laboratories performing metal impact assessment under Clause 6.4 (Equipment) and supports documented traceability to national standards via optional calibration certificate (NIM or CNAS-accredited). While not FDA 21 CFR Part 11–compliant by default (lacking electronic audit trail), its analog readout and manual data recording workflow remain fully acceptable for ISO 9001 and IATF 16949 quality systems where paper-based records are authorized.
Software & Data Management
The JB-300B operates as a stand-alone analog instrument without embedded microprocessor control or digital output interfaces. Impact energy values are read directly from the dual-range dial gauge (0–150 J and 0–300 J scales), each with a resolution of 1 J and linearity error ≤ ±1.0% of full scale per GB/T 3803-2002. For laboratories requiring digital data capture, optional external USB-connected digital calipers or high-speed photogate sensors may be integrated to record pendulum angular displacement; however, such configurations fall outside the factory-certified measurement chain and require independent validation. Calibration certificates, verification reports, and specimen preparation logs must be maintained manually in accordance with GLP principles for audit readiness.
Applications
- Quality conformance testing of structural steels, cast irons, and aluminum alloys per ASTM A370, EN 10045-1, and GB/T 229-2007.
- Toughness screening of weldments and heat-affected zones (HAZ) in pressure vessel and pipeline fabrication.
- Batch release testing in foundries and rolling mills where rapid pass/fail decisions are required prior to further processing.
- Educational demonstration of ductile-to-brittle transition behavior in metallurgy and materials science curricula.
- Pre-qualification of materials for aerospace fasteners and automotive safety components under OEM-specific specifications (e.g., GMW14872, Ford WSS-M1A366-B).
FAQ
What standards does the JB-300B comply with?
It conforms to GB/T 229-2007 (equivalent to ISO 148-1:2016) for test methodology and GB/T 3803-2002 for machine verification and classification.
Can it test subsize specimens?
No—the JB-300B is configured exclusively for full-size 10 mm × 10 mm × 55 mm Charpy specimens. Subsize testing requires dedicated fixtures and energy recalibration not supported by this model.
Is the pendulum energy adjustable?
No—impact energy is determined solely by pendulum mass and drop height. The dual-scale dial allows reading across 150 J and 300 J ranges, but the physical pendulum assembly is fixed for one nominal energy level.
Does it include calibration documentation?
Factory calibration data is provided with shipment. For accredited use, users must obtain periodic verification from a CNAS-accredited metrology lab using certified reference specimens.
What maintenance is required?
Monthly inspection of anvil wear, blade edge integrity, and safety interlock functionality; annual lubrication of pivot bearings and verification of pendulum free-swing damping per GB/T 3803-2002 Annex B.
