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7049-T73是一种耐应力腐蚀裂纹性能极好的高强铝合金。人们已用它来生产模锻件和自由锻件。成分:物理常数:锌7.2-7.8 比重2.76克/厘米~3镁2.0-2.9 熔炼温度477-627℃铜1.2-1.9 热膨胀系数(20-100℃)23.2×10~(-6) /℃铬0.10-0.22 导热系数0.36卡/厘米·秒·℃铁最大0.35 弹性模量(拉应力)7.1×10~3公斤/毫米~2硅最大0.25 电阻系数 0.043欧姆·毫米~2/米锰最大0.20钛最大1.0铝其余性能如附表:
7049-T73 is a high strength aluminum alloy with excellent stress corrosion cracking resistance. It has been used to produce forgings and free forgings. Composition: Physical Constituents: Zinc 7.2-7.8 Specific Gravity 2.76 g / cm 3 Magnesium 2.0-2.9 Melting Temperature 477-627 ℃ Copper 1.2-1.9 Thermal Expansion Coefficient (20-100 ℃) 23.2 × 10 -6 / ℃ Chromium 0.10 -0.22 Thermal Conductivity 0.36 cal / cm · sec · ℃ Iron Maximum 0.35 Modulus of Elasticity 7.1 × 10 ~ 3 kg / mm 2 Silica Max 0.25 Resistivity 0.043 Ω · mm -2 / m Manganese Maximum 0.20 Titanium Maximum 1.0 The remaining performance of aluminum as Schedule: