JB/T 9377-2010 is a mechanical industry standard that defines technical conditions for ultrasonic hardness testers used for metal hardness measurement using the ultrasonic contact impedance (UCI) approach.
It is typically used when you need fast, portable hardness checks on finished or semi-finished metal parts where conventional bench hardness methods are impractical due to part size, access, or in-service inspection constraints. If you need help aligning your application and acceptance criteria to the correct edition, talk with our team.
JB/T 9377-2010 — 超声硬度计 技术条件 (Ultrasonic hardness tester technical conditions)
This standard is focused on the instrument: what an ultrasonic hardness tester must do and how it is evaluated as a product. It is commonly referenced for purchasing, incoming inspection, and ongoing verification of UCI-style hardness testers used on metallic materials.
Because this is an instrument technical-conditions document (not a standalone hardness test method), it is often used alongside internal procedures or other hardness standards that define how results are applied to a specific part, alloy, or heat-treatment requirement.
Quick definition
Document type: Technical conditions / instrument requirements standard for ultrasonic hardness testers.
Typical purpose: Support procurement, acceptance, and quality control of UCI ultrasonic hardness testers used to measure hardness on metal components.
Common output scales: Ultrasonic hardness testers are commonly used to report values aligned to Brinell, Rockwell, and Vickers scales when properly calibrated for the material and probe configuration.
What this standard covers
JB/T 9377-2010 sets expectations for an ultrasonic hardness tester as a manufactured device, including technical requirements and the associated inspection/assessment approach used to judge whether the instrument meets those requirements.
In practice, it is referenced when specifying or qualifying portable UCI hardness testers for shop-floor checks, field inspection, and maintenance use on metallic parts.
Why this standard matters in testing
When a purchase order, quality plan, or customer requirement calls out JB/T 9377-2010, it usually means the hardness tester itself must meet defined performance and documentation expectations—not just that “hardness was measured.”
For QA/QC teams, this helps reduce disputes about whether a portable ultrasonic hardness tester is suitable for release decisions, incoming inspection, or in-service condition checks, especially where repeatability and traceability expectations are formalized.
Common materials, product types, or applications covered
This standard is used with ultrasonic hardness testers intended for metallic materials. Typical application areas include:
- Machined components and assemblies where access is limited or parts are too large for bench testers
- Heat-treated steel parts requiring rapid screening or sorting checks
- Weld zones or repaired areas where portable hardness verification is required (with appropriate local procedures)
- Plant maintenance inspections for wear, degradation, or service-life monitoring programs
Common test or verification workflow
JB/T 9377-2010 is commonly tied to an equipment-focused workflow rather than a single “press go” test method. Many labs and plants use a flow similar to:
- Select a UCI probe/load appropriate for the surface condition and part geometry
- Calibrate or adjust the instrument using suitable reference blocks and the target material group (as required by your procedure)
- Perform spot measurements at defined locations and orientations
- Record hardness values, instrument settings, and traceability information for the job
- Perform routine checks (daily/shift/periodic) using reference blocks to maintain confidence in readings
Exact acceptance rules (sampling, pass/fail criteria, averaging, re-test rules) are typically defined by the product specification, drawing, or internal quality procedure rather than by an instrument technical-conditions standard.
Equipment commonly used for this standard
Equipment selection is usually centered on a UCI ultrasonic hardness tester system and the supporting items needed to maintain consistent results in production and field environments.
Common equipment: Portable ultrasonic hardness tester (UCI type), application-specific probes, certified hardness reference blocks for routine checks, accessories for positioning on curved or small parts, and software or connectivity options for data capture and reporting.
Practical selection notes: UCI testing is sensitive to probe choice, surface condition, and how calibration is managed for different alloys and heat treatments. For purchasing, it is important to define the target hardness range(s), part geometry constraints, surface finish limits, and the reporting scale(s) your quality system requires.
How to read this designation or revision
JB/T: Mechanical industry (China) standard series.
9377: The document identifier within the JB/T series.
2010: The publication year for this edition.
Revision sensitivity: Procurement and acceptance can depend on the exact cited edition. If a contract or customer requirement references a different year, the required documentation and verification expectations may change.
Related standards, methods, or frameworks when useful
Ultrasonic hardness testing is frequently coordinated with other hardness standards and internal procedures that define how hardness results are used for acceptance. In many quality systems, portable ultrasonic hardness checks are also cross-validated against bench hardness methods during qualification studies.
When you are building a compliant workflow, it is common to align the instrument requirement (JB/T 9377-2010) with a separate document that defines the hardness test method, reporting rules, and acceptance criteria for the specific product.
Get help selecting an ultrasonic hardness tester setup
If you are specifying a UCI hardness tester system to meet a JB/T 9377-2010 requirement (including probes, reference blocks, and data capture needs), you can request a detailed quote for a configuration matched to your parts and hardness ranges.