{"product_id":"value-collection-htr30770j-rockwell-c-hardness-test-block","title":"Value Collection HTR30770J Rockwell C Hardness Test Block","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION HTR30770J is a Rockwell C scale hardness calibration test block used to verify and validate the accuracy of Rockwell hardness testers. Manufactured from steel and rated at 45 HRC, this block falls in the mid hardness range, making it a practical reference standard for routine calibration checks. Metrology technicians, quality control inspectors, and tool room personnel rely on calibration test blocks like this one to confirm that hardness testing equipment is reading within acceptable tolerances before testing production parts or material certifications.\u003c\/p\u003e\n\u003cp\u003eThis test block is suited for industrial and shop-floor calibration applications where Rockwell C scale hardness testing is performed. The 45 HRC value represents a mid-range hardness commonly encountered when testing heat-treated steel components, tool steels, and hardened machine parts. It is appropriate for use in quality labs, receiving inspection stations, and manufacturing environments that require documented calibration intervals for hardness testing instruments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eRockwell C scale calibration standard at 45 HRC mid hardness range\u003c\/li\u003e\n  \u003cli\u003eSteel construction provides a stable, consistent reference surface\u003c\/li\u003e\n  \u003cli\u003eDesigned for verifying Rockwell hardness tester accuracy before use\u003c\/li\u003e\n  \u003cli\u003eCompact single-block format for benchtop or portable tester calibration\u003c\/li\u003e\n  \u003cli\u003eUNSPSC Code 41114600 for procurement and catalog classification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style calibration reference for Rockwell hardness testers that operate on the C scale. Confirm that your specific tester model and indenter type are compatible with Rockwell C scale test blocks before use.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCalibration test blocks should be handled carefully to avoid surface damage, which can affect reading accuracy. Place the block on a clean, flat anvil surface and apply the indenter only to the marked test surface. Follow the hardness tester manufacturer calibration procedure and applicable ASTM or ISO standards for Rockwell hardness verification. Store the block in its protective case when not in use to prevent surface contamination or corrosion.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScale Type\u003c\/strong\u003e: Rockwell C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Hardness\u003c\/strong\u003e: 45 HRC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness Range\u003c\/strong\u003e: Mid Range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlock Type\u003c\/strong\u003e: Test\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.35 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 41114600\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: HTR30770J\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":68385324892466,"sku":"HTR30770J","price":150.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0ff33d44ebd27e9109f69cdd13fc86c9.jpg?v=1793902567","url":"https:\/\/voomisupply.com\/products\/value-collection-htr30770j-rockwell-c-hardness-test-block","provider":"Voomi Supply","version":"1.0","type":"link"}