YANRUN YHRI-150SM Fully Automatic Sensor-Loaded Rockwell Hardness Tester

Overview

The YANRUN YHRI-150SM is a fully automated, sensor-controlled Rockwell hardness tester engineered for precision, repeatability, and long-term operational stability in industrial quality control and metrology laboratories. It operates on the fundamental principle of Rockwell hardness measurement—applying a minor preliminary load followed by a major load, then measuring the permanent depth deformation of an indenter (either diamond cone or hardened steel ball) into the test material. The instrument implements closed-loop force control via high-accuracy load cells, ensuring strict adherence to ASTM E18 and ISO 6508-1 mechanical loading requirements. Designed with a rigid cast-iron frame and optimized thermal mass distribution, the YHRI-150SM minimizes mechanical drift and vibration sensitivity—critical for consistent results across high-volume production floor environments and accredited calibration labs.

Key Features

• Full-color capacitive touchscreen interface with intuitive menu-driven navigation—no physical buttons or external PC required.
• Integrated closed-loop load control system using calibrated force sensors to maintain ±0.5% accuracy across all standard and superficial Rockwell test forces (15/30/45 kgf superficial; 60/100/150 kgf regular).
• High-rigidity cast-iron chassis with reinforced column and base assembly—designed to resist torsional deflection under repeated loading cycles and ambient workshop vibrations.
• Digital hardness readout with 0.1 HR resolution, automatically compensating for cylindrical specimen geometry per ASTM E18 Annex A3.
• Built-in thermal-stabilized micro-printer for immediate hard-copy output of test records—including date/time stamp, operator ID, test parameters, and raw indentation depth values.
• Multi-scale conversion capability supporting direct reporting in HRC, HRA, HRB, HR15N, HR30T, HV, HBW, HK, and other standardized scales per ISO 18265 and ASTM E140.

Sample Compatibility & Compliance

The YHRI-150SM accommodates a broad range of metallic specimens, including ferrous alloys (carbon steels, tool steels, stainless grades), non-ferrous metals (aluminum, copper, titanium, brass), and case-hardened or thin-coated components. Its 180 mm maximum specimen height and 160 mm indenter-to-column clearance support large forgings, heat-treated gears, and machined shafts. The instrument complies with national verification regulation JJG 112 and testing standard GB/T 230.2—fully aligned with international metrological traceability frameworks. All hardness measurements are traceable to national standards through certified reference blocks (supplied with three standard Rockwell and three superficial Rockwell blocks). For regulated environments, audit-ready data logs include full load-time profiles, environmental temperature metadata (via optional external probe integration), and user-accessible calibration history—supporting GLP/GMP documentation requirements and FDA 21 CFR Part 11 readiness when paired with validated LIMS interfaces.

Software & Data Management

While the YHRI-150SM operates autonomously via its embedded controller, it supports RS-232 and USB host connectivity for seamless integration into enterprise QA/QC workflows. Exported test data follows ASTM E1318-compliant CSV format, containing timestamp, scale identifier, load sequence, indentation depth (µm), hardness value, operator code, and block calibration status. Internal memory retains up to 1,000 test records with timestamped versioning. Firmware updates are performed via USB drive without service intervention. Optional PC software (YANRUN Hardness Manager v3.x) enables statistical process control (SPC) charting, Cp/Cpk calculation, multi-instrument fleet monitoring, and PDF report generation compliant with ISO/IEC 17025 clause 7.8.2.

Applications

• Final inspection of heat-treated automotive components (crankshafts, camshafts, bearing races)
• In-process verification of surface hardness in nitrided or carburized layers
• Supplier qualification testing per IATF 16949 clause 8.4.2.2
• Calibration lab accreditation under CNAS/ILAC-MRA against ISO/IEC 17025
• Metallurgical R&D for alloy development and phase transformation analysis
• Third-party certification of aerospace fasteners per AMS 2242 and AMS 2249

FAQ

Does the YHRI-150SM meet ASTM E18 and ISO 6508-1 requirements for force application accuracy?

Yes—the closed-loop sensor-controlled loading system maintains force tolerance within ±0.5% of setpoint across all standard and superficial scales, satisfying Clause 6.2 of ASTM E18 and Clause 5.2 of ISO 6508-1.
Can the instrument perform automatic cylindrical correction for shafts and pins?

Yes—it applies real-time geometric compensation per ASTM E18 Annex A3 based on user-input specimen diameter, eliminating manual correction tables.
Is the built-in printer compatible with laboratory information management systems (LIMS)?

The printer outputs human-readable reports; for LIMS integration, use RS-232 or USB to stream ASCII-formatted test records directly into validated data acquisition platforms.
What maintenance intervals are recommended for long-term accuracy?

Annual verification using certified reference blocks is required per JJG 112; load cell recalibration is advised every 24 months or after 50,000 test cycles, whichever occurs first.
Are replacement indenters and anvils available as genuine OEM parts?

Yes—YANRUN supplies NIST-traceable diamond cone indenters (120° apex angle, 0.2 mm tip radius) and tungsten carbide balls (1.5875 mm and 3.175 mm diameters) with full lot traceability and calibration certificates.