Jenny

By Jenny Leeb hardness testing for mold steel is useful as a portable, location-specific screening method when the buyer controls the test setup and reporting. A rebound reading can support receiving inspection or process review, but it is not proof of hardness throughout a mold component. Approve the method only after matching the impact device, […]

By Jenny Brinell hardness testing for mold steel presses a tungsten-carbide ball into a prepared surface, then uses the optically measured indentation diameter to report hardness as HBW. For buyers, the decision is less about obtaining a single number than confirming that the mark, location, test conditions, and material traceability make that number relevant to

By Jenny Rockwell reference blocks help a buyer decide whether a hardness tester was behaving credibly before mold steel was measured. Select a block for the reported scale and expected hardness range, confirm its identity and certificate, review the dated check and individual readings, then keep that evidence separate from the mold-part result itself. By

By Jenny Surface preparation for Rockwell hardness testing should create clean, stable contact without accidentally changing the layer the result is intended to represent. For mold steel buyers, the useful question is not whether a face looks polished; it is whether the reported location, preparation history, support condition, and Rockwell scale make the value meaningful

By Jenny Rockwell testing of thin mold parts is credible only when the reported scale, local section thickness, support condition, test location, and acceptance requirement describe the same engineering question. A hardness number alone cannot prove that. Buyers should request the applicable current method and its scale-specific thickness criteria, then review the reverse side, geometry,

By Jenny A Rockwell result taken on a convex cylindrical mold part is not automatically comparable with a flat-surface result. First establish whether the test location, scale, part geometry, surface, and support make the measurement valid. Only then may an applicable cylindrical correction be documented as a separate step. A correction cannot rescue a poorly

By Jenny Rockwell hardness dwell time for mold steel is not a universal number to copy into an RFQ. It is one controlled part of a complete indentation cycle: establish a reference under minor force, apply and hold the total force, remove the additional force, then take the final depth reading under minor force. Approve

By Jenny Microhardness indent spacing for mold steel should be approved from the named test method, load, measured indent dimensions, specimen geometry, and governing standard—not from a universal shop rule. Review center-to-center separation, edge distance, and test-position depth separately, then retain any invalid results in the report with a clear reason instead of silently removing

By Jenny Metallographic etching for mold steel is a controlled contrast-enhancement step performed on a prepared specimen so a reviewer can see relevant macrostructure or microstructure. It is not production surface etching and it is not proof of material grade, hardness, case depth, or mold life. A useful report ties each etched image to the

By Jenny Metallographic edge retention for mold steel means preserving the true boundary of a section through mounting, grinding, and polishing so near-surface features can be evaluated without preparation-created distortion. Buyers should approve the sampling location and orientation first, then review traceability, overview and magnified images, preparation details, and a clear disposition if the edge