QUALITY RECORDS

Test Reports

Original report PDFs with their sample, test result, date and issuing laboratory identified. Read the complete PDF for the methods and scope of each result.

01 / INDEPENDENT TESTING

Independent Lab Reports 第三方检测报告

The reports identify the National Quality Inspection & Testing Center for Abrasives and the respective issuing legal entity. The issuing entity differs between reports; its name is shown on each card.

No. CB03338956-001

Brown fused alumina, block sample

棕刚玉块状样品

Result / 结果: Bulk density: 3.93 g/cm³ (GB/T 2997-2015)
体积密度：3.93 g/cm³（GB/T 2997-2015）
Testing date / 检测日期: 2025-02-28
Issuing entity / 出具机构: Zhengzhou Research Institute for Abrasives & Grinding Co., Ltd.
郑州磨料磨具磨削研究所有限公司

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No. DG06454183-001

Brown fused alumina F36

棕刚玉 F36

Result / 结果: Magnetic matter: 0.0070%; ferroalloy grains: 0%; density: 3.95 g/cm³
磁性物含量：0.0070%；铁合金粒含量：0%；密度：3.95 g/cm³
Testing date / 检测日期: 2026-07-22
Issuing entity / 出具机构: Precision Industry Boyan Inspection Technology (Henan) Co., Ltd.
精工博研测试技术（河南）有限公司

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No. BL05154011-001

Brown fused alumina, block sample

棕刚玉块状样品

Result / 结果: Microhardness: 2124 HV0.2; refractoriness: >1800°C; compressive strength: 404.2 MPa
显微硬度：2124 HV0.2；耐火度：＞1800℃；抗压强度：404.2 MPa
Testing date / 检测日期: 2024-12-31
Issuing entity / 出具机构: Zhengzhou Research Institute for Abrasives & Grinding Co., Ltd.
郑州磨料磨具磨削研究所有限公司

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No. CL01537048-001

Brown fused alumina 30–120

棕刚玉 30–120

Result / 结果: Magnetic matter: 0.0060%; ferroalloy grains: 0.0%; density: 3.96 g/cm³
磁性物含量：0.0060%；铁合金粒含量：0.0%；密度：3.96 g/cm³
Testing date / 检测日期: 2025-12-06
Issuing entity / 出具机构: Precision Industry Boyan Inspection Technology (Henan) Co., Ltd.
精工博研测试技术（河南）有限公司

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Test results apply to the submitted samples only. 检测结果仅对送检样品负责。

02 / FACTORY QUALITY RECORDS

In-house Batch QC 出厂批次检测

These are company inspection records and are separate from the independent laboratory reports above. The white fused alumina report records testing commissioned to Zhengzhou Xinlü Testing.

Report 2025

Brown fused alumina, multiple samples and grades

棕刚玉，多种送检样品与粒度

Result / 结果: Includes F24, F80, 200F and block results; see six-page original report for each sample and batch
含 F24、F80、200F 和块料等结果；各送检样品和批次数据以六页原报告为准
Testing date / 检测日期: 2025-11-18 to 2025-11-29
Testing / 检测单位: Luoyang Naibao In-house Laboratory
洛阳耐宝化验室
Standard / 依据: GB/T 2478-2022

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Report 5219

Brown fused alumina F30, batch 000005219

棕刚玉 F30，批号 000005219

Result / 结果: Al₂O₃: 95.1%
Al₂O₃：95.1%
Testing date / 检测日期: 2026-09-04
Testing / 检测单位: Luoyang Naibao In-house Laboratory
洛阳耐宝化验室
Standard / 依据: GB/T 2478-2022

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Report 5233

Brown fused alumina F150, batch 000005233

棕刚玉 F150，批号 000005233

Result / 结果: Al₂O₃: 93.97%
Al₂O₃：93.97%
Testing date / 检测日期: 2026-09-28
Testing / 检测单位: Luoyang Naibao In-house Laboratory
洛阳耐宝化验室
Standard / 依据: GB/T 2478-2022

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Report 0715

White fused alumina F24 and F46, batch 000003399

白刚玉 F24、F46，批号 000003399

Result / 结果: Al₂O₃: 99.3% (F24), 99.4% (F46)
Al₂O₃：F24 99.3%，F46 99.4%
Testing date / 检测日期: 2026-07-17
Testing / 检测单位: Testing commissioned to Zhengzhou Xinlü Testing
委托郑州新铝检测
Standard / 依据: GB/T 2481.2-1998

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Test results apply to the stated sample or batch only. 检测结果仅对所列送检样品或该批次样品负责。

LABORATORY CREDENTIAL

Testing Laboratory Accreditation (CMA) 检测机构资质认定证书

The linked CMA certificate belongs to Zhengzhou Research Institute for Abrasives & Grinding Co., Ltd., which the certificate also authorizes to use the National Quality Inspection & Testing Center for Abrasives name. Certificate No. 240008349881, valid through 2030-06-02. It is the testing institution’s credential, not a certification of Luoyang Naibao New Materials Co., Ltd. or of every product or batch.

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