YANRUN YHRI-45M Sensor-Actuated Digital Surface Rockwell Hardness Tester

Overview

The YANRUN YHRI-45M is a fully automated, sensor-actuated digital surface Rockwell hardness tester engineered for precision, repeatability, and operational efficiency in industrial quality control and metrology laboratories. It implements the standardized Rockwell method—defined by ASTM E18 and ISO 6508—where hardness is determined by measuring the permanent depth increment of an indenter under controlled major and minor loads. Unlike traditional dead-weight systems, the YHRI-45M employs a closed-loop force feedback system with high-stability load cells to precisely regulate and verify applied test forces in real time. This architecture ensures compliance with GB/T 230.2 (equivalent to ISO 6508-2) and supports traceable calibration per JJG 112 national verification regulations. Designed for surface-hardened materials—including case-hardened steels, thin coatings, carburized layers, and small-diameter cylindrical parts—the instrument delivers stable readings across shallow-depth Rockwell scales (N and T series), minimizing substrate interference and enabling reliable evaluation of near-surface mechanical integrity.

Key Features

• Full-color capacitive touchscreen interface with intuitive menu-driven navigation—no external PC required for routine operation.
• Robust cast-iron frame with vibration-damped base structure, ensuring dimensional stability and long-term resistance to mechanical deformation under repeated loading cycles.
• Integrated high-precision load cell system providing real-time force monitoring and closed-loop correction during both preliminary and major load application phases.
• Digital hardness value display with 0.1 HR resolution and automatic zero-point compensation; eliminates parallax and interpolation errors inherent in analog dial readouts.
• Onboard thermal-printer module for immediate hardcopy output of test results, including date/time stamp, scale used, load parameters, and specimen ID (user-defined).
• Programmable dwell times (0–99 s, 1 s increments) for preliminary force, total force, and return phases—critical for testing viscoelastic or creep-prone materials such as tempered alloys or nitrided surfaces.
• Built-in Rockwell scale conversion engine supporting direct cross-referencing among HRC, HRA, HRB, HRF, HR15N/30N/45N, HR15T/30T/45T, HV, HK, HBW, and HRD—calculated per ISO 18265 and ASTM E140.

Sample Compatibility & Compliance

The YHRI-45M accommodates specimens up to 180 mm in height and accepts flat, curved, or irregular geometries via interchangeable test tables (large flat, medium flat, V-groove). Its 160 mm indenter-to-column distance allows unobstructed access to larger components while maintaining rigidity. The instrument supports all standard Rockwell indenters: 120° diamond cone (for HRA, HRC, HR15N, etc.) and 1.5875 mm tungsten carbide ball (for HRB, HRF, HR15T, etc.). All mechanical and electronic subsystems are validated against GB/T 230.2–2012 (identical to ISO 6508-2:2015), and its measurement uncertainty profile meets requirements for use in GLP-compliant environments. While not FDA 21 CFR Part 11 certified out-of-the-box, audit-ready data logs—including raw force vs. time curves, dwell timing metadata, and operator IDs—can be exported via USB for integration into validated LIMS or QMS platforms.

Software & Data Management

Operation is self-contained within the embedded firmware—no proprietary software installation required. Test sequences, user profiles, and calibration records are stored internally with non-volatile memory retention. Each test record includes timestamp, selected scale, applied forces, dwell durations, measured hardness value, and pass/fail status relative to user-defined tolerance bands. Data export is supported via USB flash drive in CSV format, preserving full traceability for internal audits or third-party accreditation (e.g., CNAS, A2LA). Optional RS-232 or Ethernet modules enable remote command execution (SCPI-compatible) and real-time data streaming to centralized SPC dashboards.

Applications

• Quality assurance of heat-treated components (e.g., gears, bearings, shafts) where surface hardness gradients must conform to OEM specifications.
• In-process verification of carburizing, nitriding, and induction hardening depth profiles using shallow-load N- and T-scale measurements.
• Incoming inspection of raw stock (bars, sheets, forgings) across ferrous and non-ferrous metallurgical families—including aluminum, copper alloys, titanium, and stainless steels.
• Metrology lab support for inter-laboratory comparisons, proficiency testing, and periodic verification of reference blocks per ISO 6508-3.
• Education and training environments requiring robust, repeatable instrumentation aligned with international standards curricula.

FAQ

What Rockwell scales does the YHRI-45M support?
It supports all standard superficial Rockwell scales: HR15N, HR30N, HR45N, HR15T, HR30T, and HR45T—enabling hardness assessment of thin sections, coatings, and case-hardened layers.
Is the instrument compliant with international metrological standards?
Yes—it conforms to GB/T 230.2–2012 (equivalent to ISO 6508-2:2015) and is verified per JJG 112 national metrological verification regulation.
Can test data be exported for statistical process control (SPC)?
Yes—results export directly to CSV via USB, retaining timestamps, scale identifiers, force parameters, and hardness values for import into SPC software or Excel-based analysis.
What is the maximum specimen height accommodated?
The instrument accepts specimens up to 180 mm tall, with optional height extensions available upon request.
Does it support automatic hardness conversion between scales?
Yes—onboard conversion follows ISO 18265 and ASTM E140 methodologies, covering HRC, HRA, HRB, HRF, HV, HBW, HK, and all supported superficial Rockwell scales.