Patent ID: 11879166
Assignee: NOVELIS KOBLENZ GMBH
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 15:
16. The wrought 7xxx-series aluminium alloy product according to claim 1, wherein said wrought 7xxx-series aluminium alloy product is aged to achieve:
a conventional tensile yield strength (in MPa) measured in the L-direction measured at quarter thickness of more than 485-0.12*(t-100)MPa (t being a thickness of said wrought 7xxx-series aluminium alloy product in mm);
a minimum life without failure due to stress corrosion cracking (SCC) measured in accordance with ASTM G47-98 of at least 30 days, at a short transverse (ST) stress level of 205 MPa; and
the minimum life without failure due to environmental assisted cracking (EAC) in the sodium chloride free humid atmosphere and measured with constant load testing configurations in accordance with ASTM G47-98 on round ST tension specimens of at least 140 days at the short transverse (ST) constant load stress level of 85% Yield Strength (YS), and with the continuous exposure to the temperature of 70° C., and at the humidity of 85% (RH).