Steel

Alloys:

1xxx Carbon

2xxx Nickel

3xxx Nickel-Chromium

4xxx Molybdenum

5xxx Chromium

6xxx Chromium-Vanadium

7xxx Tungsten

8xxx Nickel-chrome-molybdenum

9xxx Silicon-Manganese

1000 Series "Low-carbon Steel"

The 2000 series is generally heat-treated for optimum properties, and heat-treated properties can exceed mild steel. Notable alloys are 2024, the most widely used alloy in aircraft, and 2117, which is used in solid rivets.

3000 Series

The 2000 series is generally heat-treated for optimum properties, and heat-treated properties can exceed mild steel. Notable alloys are 2024, the most widely used alloy in aircraft, and 2117, which is used in solid rivets.

18-8

18-8, or 18% Chromium 8% Nickel, is