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Tensile testing is what actually measures strength. It gives you yield strength, ultimate tensile strength and ductility directly from a stress-strain curve. Portable hardness testers measure resistance to indentation, and strength values derived from them are estimates based on conversion tables, which can be reasonably close for some common steels but unreliable for many other materials and conditions. The practical problem is that tensile testing needs a machined specimen and a laboratory, wh…
続きを読む>>Portable Hardness Testers vs Tensile Testing: What Actually Measures Strength
