{"id":6813,"date":"2024-11-06T03:57:56","date_gmt":"2024-11-06T03:57:56","guid":{"rendered":"https:\/\/premiumalu.com\/mastering-7075-t651-aluminum-alloy-a-comprehensive-guide\/"},"modified":"2026-07-27T12:39:28","modified_gmt":"2026-07-27T12:39:28","slug":"dominando-a-liga-de-aluminio-7075-t651-um-guia-abrangente","status":"publish","type":"post","link":"https:\/\/premiumalu.com\/pt\/dominando-a-liga-de-aluminio-7075-t651-um-guia-abrangente\/","title":{"rendered":"Um guia abrangente sobre a liga de alum\u00ednio 7075-T651"},"content":{"rendered":"

Principais destaques<\/h2>\n
    \n
  1. 7075-T651 is a stress-relieved variant of 7075-T6, achieved by stretching the material 1\u20133% after quenching to reduce residual stresses.<\/li>\n
  2. The T651 temper maintains T6-level strength (~572 MPa tensile) while improving dimensional stability during machining.<\/li>\n
  3. It is the preferred temper for thick plate and precision-machined aerospace components where post-machining distortion must be minimized.<\/li>\n
  4. Zinc is the primary alloying element, delivering the highest strength among commonly available aluminum alloys.<\/li>\n
  5. Corrosion resistance is moderate \u2014 surface treatment is recommended for harsh or marine environments.<\/li>\n<\/ol>\n

    Introdu\u00e7\u00e3o<\/h2>\n

    Liga de alum\u00ednio 7075-T651<\/a> is a high-strength, heat-treated material widely used in aerospace, defense, and precision machining. The T651 temper is a specific variation of T6 that adds a stress-relief step, making it the standard choice for thick plate and components that require tight dimensional tolerances after machining. This guide covers the properties, applications, and practical considerations of 7075-T651.<\/p>\n

    Entendendo a liga de alum\u00ednio 7075-T651<\/h2>\n

    What Does T651 Mean?<\/h3>\n

    The “T651” designation describes a specific heat treatment process:<\/p>\n

      \n
    1. Solution heat treatment:<\/strong> The alloy is heated to dissolve the alloying elements into solid solution.<\/li>\n
    2. Quenching:<\/strong> Rapid cooling (typically in water) traps the elements in solution.<\/li>\n
    3. Stress relief by stretching:<\/strong> The material is stretched 1\u20133% in length to relieve residual quenching stresses. This is the key step that distinguishes T651 from T6.<\/li>\n
    4. Artificial aging:<\/strong> A controlled precipitation hardening cycle that develops peak strength.<\/li>\n<\/ol>\n

      The stretching step is what makes T651 different from T6. In thick plates, quenching creates internal stresses that can cause warping during machining. T651 relieves these stresses, so machined parts hold their dimensions. This is why aerospace specifications for thick plate typically call for T651 rather than T6.<\/p>\n

      Mechanical Properties of 7075-T651<\/h3>\n
      \n\n\n\n\n\n\n\n\n\n\n
      Propriedade<\/th>\n7075-T651<\/th>\n<\/tr>\n<\/thead>\n
      Resist\u00eancia \u00e0 tra\u00e7\u00e3o (MPa)<\/td>\n572<\/td>\n<\/tr>\n
      Resist\u00eancia ao escoamento (MPa)<\/td>\n503<\/td>\n<\/tr>\n
      Resist\u00eancia ao cisalhamento (MPa)<\/td>\n331<\/td>\n<\/tr>\n
      Alongamento (%)<\/td>\n11<\/td>\n<\/tr>\n
      Dureza (Brinell)<\/td>\n150<\/td>\n<\/tr>\n
      Densidade (g\/cm\u00b3)<\/td>\n2.81<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      Compara\u00e7\u00e3o com outras ligas de alum\u00ednio<\/h3>\n
      \n\n\n\n\n\n\n\n
      Liga met\u00e1lica<\/th>\nResist\u00eancia \u00e0 tra\u00e7\u00e3o (MPa)<\/th>\nResist\u00eancia ao escoamento (MPa)<\/th>\nResist\u00eancia \u00e0 corros\u00e3o<\/th>\n<\/tr>\n<\/thead>\n
      7075-T651<\/td>\n572<\/td>\n503<\/td>\nModerado<\/td>\n<\/tr>\n
      2024-T3<\/a><\/td>\n470<\/td>\n325<\/td>\nJusto<\/td>\n<\/tr>\n
      6061-T6<\/a><\/td>\n310<\/td>\n276<\/td>\nBom<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      7075-T651 is significantly stronger than both 2024-T3 and 6061-T6. However, 6061-T6 offers better corrosion resistance and weldability at lower cost. The choice depends on whether your application prioritizes strength (7075) or versatility and cost (6061). For a detailed analysis, see our 6061 vs 7075 comparison guide<\/a>.<\/p>\n

      T651 vs T6: Key Differences<\/h3>\n
      \n\n\n\n\n\n\n\n\n
      Propriedade<\/th>\n7075-T6<\/th>\n7075-T651<\/th>\n<\/tr>\n<\/thead>\n
      For\u00e7a<\/td>\nSame<\/td>\nSame<\/td>\n<\/tr>\n
      Residual Stress<\/td>\nMais alto<\/td>\nLower (stress-relieved)<\/td>\n<\/tr>\n
      Dimensional Stability After Machining<\/td>\nInferior<\/td>\nMais alto<\/td>\n<\/tr>\n
      Preferred For<\/td>\nThin sections, extrusions<\/td>\nThick plate, precision machining<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      For comparison with the T73 temper (which prioritizes stress-corrosion cracking resistance over strength), see our 7075-T73 properties guide<\/a>.<\/p>\n

      Principais aplicativos e setores<\/h2>\n

      Aeroespacial e avia\u00e7\u00e3o<\/h3>\n

      7075-T651 is a standard material in aerospace manufacturing. Its high strength-to-weight ratio and dimensional stability make it ideal for:<\/p>\n