Material Datasheet · ASTM / ISO StyleMaterial Datasheet · ASTM / ISO Style
鋁合金 Aluminum Alloy 7075-T6 / T651
7000 Series · 鋁鋅合金系列Al-Zn Alloy Series · 熱處理 Heat-treated
1範圍 Scope
本規格表彙整鋁合金 This datasheet compiles aluminum alloy 7075-T6 / T651（鋁鋅合金系列）之代表性化學成分、物理、機械、電氣、熱與加工性質。所列數值為典型參考值，依產品形式與量測條件而異，不作為設計或允收依據。's representative chemical composition, physical, mechanical, electrical, thermal, and processing properties. Values shown are typical references — they vary with product form and measurement conditions, and should NOT be used as the sole basis for design or acceptance.
2識別與國際牌號 Designations
| 材料分類Material Category | 7000 Series 鋁鋅合金系列（Al-Zn） |
| 鋁業協會 AAAluminum Association (AA) | 7075-T6 |
| ISO | AlZn5.5MgCu |
3化學成分 Chemical Composition (Wt. %)
| 元素 ElementElement | 含量 Composition (wt.%)Composition (wt.%) |
|---|
| 鋁 Aluminum Al | 87.1 – 91.4 |
| 鎂 Magnesium Mg | 2.1 – 2.9 |
| 矽 Silicon Si | ≤ 0.4 |
| 鉻 Chromium Cr | 0.18 – 0.28 |
| 錳 Manganese Mn | ≤ 0.3 |
| 鈦 Titanium Ti | ≤ 0.2 |
| 銅 Copper Cu | 1.2 – 2 |
| 其他元素（單一） Other, each — | ≤ 0.05 |
| 鋅 Zinc Zn | 5.1 – 6.1 |
| 鐵 Iron Fe | ≤ 0.5 |
| 其他元素（總計） Other, total — | ≤ 0.15 |
鋁含量以餘量（remainder）計算；成分範圍為國際牌號標準值。Aluminum content is calculated as the remainder; ranges are international standard values.
4物理性質 Physical Properties
| 性質 PropertyProperty | 公制 MetricMetric | 英制 ImperialImperial | 備註 NotesNotes |
|---|
| 密度Density | 2.81 g/cc | 0.102 lb/in³ | AA; Typical |
5機械性質 Mechanical Properties
| 性質 PropertyProperty | 公制 MetricMetric | 英制 ImperialImperial | 備註 NotesNotes |
|---|
| 硬度（布氏 HB）Hardness, Brinell | 150 | 150 | AA; Typical; 500 g load; 10 mm ball |
| 硬度（努氏 HK）Hardness, Knoop | 191 | 191 | Converted from Brinell Hardness Value |
| 硬度（洛氏 HRA）Hardness, Rockwell A | 53.5 | 53.5 | Converted from Brinell Hardness Value |
| 硬度（洛氏 HRB）Hardness, Rockwell B | 87 | 87 | Converted from Brinell Hardness Value |
| 硬度（維氏 HV）Hardness, Vickers | 175 | 175 | Converted from Brinell Hardness Value |
| 極限抗拉強度Ultimate Tensile Strength | 572 MPa | 83000 psi | AA; Typical |
| 抗拉降伏強度Tensile Yield Strength | 503 MPa | 73000 psi | AA; Typical |
| 斷裂伸長率Elongation at Break | 11 % | 11 % | AA; Typical; 1/16 in. (1.6 mm) Thickness |
| 斷裂伸長率Elongation at Break | 11 % | 11 % | AA; Typical; 1/2 in. (12.7 mm) Diameter |
| 彈性模數Modulus of Elasticity | 71.7 GPa | 10400 ksi | AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus. |
| 蒲松比Poisson's Ratio | 0.33 | 0.33 | |
| 疲勞強度Fatigue Strength | 159 MPa | 23000 psi | AA; 500,000,000 cycles completely reversed stress; RR Moore machine/specimen |
| 斷裂韌性Fracture Toughness | 20 MPa-m½ | 18.2 ksi-in½ | K(IC) in S-L Direction |
| 斷裂韌性Fracture Toughness | 25 MPa-m½ | 22.8 ksi-in½ | K(IC) in T-L Direction |
| 斷裂韌性Fracture Toughness | 29 MPa-m½ | 26.4 ksi-in½ | K(IC) in L-T Direction |
| 切削加工性Machinability | 70 % | 70 % | 0-100 Scale of Aluminum Alloys |
| 剪切模數Shear Modulus | 26.9 GPa | 3900 ksi | |
| 剪切強度Shear Strength | 331 MPa | 48000 psi | AA; Typical |
6電氣性質 Electrical Properties
| 性質 PropertyProperty | 公制 MetricMetric | 英制 ImperialImperial | 備註 NotesNotes |
|---|
| 電阻率Electrical Resistivity | 5.15e-006 ohm-cm | 5.15e-006 ohm-cm | AA; Typical at 68°F |
7熱性質 Thermal Properties
| 性質 PropertyProperty | 公制 MetricMetric | 英制 ImperialImperial | 備註 NotesNotes |
|---|
| 線膨脹係數（68°F）CTE, linear 68°F | 23.6 µm/m-°C | 13.1 µin/in-°F | AA; Typical; Average over 68-212°F range. |
| 線膨脹係數（250°C）CTE, linear 250°C | 25.2 µm/m-°C | 14 µin/in-°F | Average over the range 20-300ºC |
| 比熱容Specific Heat Capacity | 0.96 J/g-°C | 0.229 BTU/lb-°F | |
| 熱導率Thermal Conductivity | 130 W/m-K | 900 BTU-in/hr-ft²-°F | AA; Typical at 77°F |
| 熔點Melting Point | 477 – 635 °C | 890 – 1175 °F | AA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater. Homogenization may raise eutectic melting temperature 20-40°F but usually does not eliminate eutectic melting. |
| 固相線溫度Solidus | 477 °C | 890 °F | AA; Typical |
| 液相線溫度Liquidus | 635 °C | 1175 °F | AA; Typical |
8加工性質 Processing Properties
| 性質 PropertyProperty | 公制 MetricMetric | 英制 ImperialImperial | 備註 NotesNotes |
|---|
| 退火溫度Annealing Temperature | 413 °C | 775 °F | |
| 固溶處理溫度Solution Temperature | 466 – 482 °C | 870 – 900 °F | |
| 時效處理溫度Aging Temperature | 121 °C | 250 °F | |
免責聲明 DisclaimerDisclaimer本規格表數值為典型參考值，隨加工狀態、產品形式與量測條件而異，不得作為設計計算或品質允收的唯一依據。資料整理自 Aluminum Association 等公開鋁合金規格，正式設計與採購請以最新版 ASTM／ISO 標準及供應商實測報告為準。Values shown are typical references that vary with temper, product form, and measurement conditions. They must NOT be used as the sole basis for design calculations or quality acceptance. Compiled from Aluminum Association and other public aluminum specifications; for formal design and procurement, refer to the latest ASTM/ISO standards and supplier test reports.