Tensile Strength from Brinell Hardness
Estimate a carbon steel's tensile strength (Rm) from the Brinell hardness, Rm ≈ 3.45·HB, in MPa. There is a remarkably robust empirical correlation between hardness and strength in steels, which lets you estimate strength from a hardness test — fast, cheap and almost non-destructive — instead of a tensile test. Useful in inspection and quality control. Enter the Brinell hardness (HB).
Resultado
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Resistência à tração por dureza Brinell
Existe uma das correlações empíricas mais úteis da metalurgia: nos aços-carbono, a resistência à tração (Rm) e a dureza caminham praticamente juntas, ligadas por Rm ≈ 3,45·HB (MPa), onde HB é a dureza Brinell. A razão física é que ambas dependem da mesma coisa — a resistência do material à deformação plástica. Isso tem um valor prático imenso: o ensaio de dureza é rápido, barato e quase não destrutivo (deixa apenas uma pequena marca), enquanto o ensaio de tração destrói um corpo de prova usinado e leva tempo. Então, em inspeção, recebimento de material e controle de qualidade, mede-se a dureza na própria peça e estima-se a resistência — sem cortar nada. (A relação vale bem para aços-carbono e baixa liga numa faixa intermediária de dureza; para outros metais o fator muda.) A mesma lógica permite verificar se um tratamento térmico atingiu a resistência desejada apenas medindo a dureza. Informe a dureza Brinell.
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The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.