Table 3.2.10.0: (a). Material Specifications for

2424 Aluminum Alloy

The temper index for 2424 is as follows:

MIL-HDBK-5J

3.2.10.0 (b₁). Design Mechanical and Physical Properties of Bare 2424-T3 Aluminum Alloy Sheet

3.2.10.0 (b₂). Design Mechanical and Physical Properties of Clad 2424-T3 Aluminum Alloy Sheet

2519 ALLOY

3.2.11.0 Comments and Properties — 2519 is an Al-Cu weldable alloy available in plate. This armor plate has equivalent ballistic protection characteristics compared to 7039 and superior stress-corrosion cracking resistance compared to 5083. See Section 3.1.2.3 for comments regarding resistance of the alloy to stress-corrosion cracking. The general corrosion characteristics of 2519 are similar to 2219. 2519 in the T87 temper has approximately 20 percent higher yield strength than 2219-T87 plate. 2519-T87 is easily welded with filler alloy 2319. Yield strengths of welded butt joints are higher than other commercially available alloys. 2519 can be post weld aged or post weld heat treated and aged to obtain improved mechanical properties compared to “as welded” condition. See Section 3.1.3.4 for further information regarding the weldability of the alloy.

A material specification of 2519 is presented in Table 3.2.11.0(a). Room-temperature mechanical and physical properties are shown in Table 3.2.11.0(b).

Table 3.2.11.0(a). Material Specification for

2519 Aluminum Alloy

The temper index for 2519 is as follows:

3.2.11.1 T87 Temper — Typical room-temperature tensile and compressive stress-strain and compressive tangent-modulus curves are presented in Figures 3.2.11.1.6(a) and (b).