Explobond Structural Transition Joints

A major area of application of explosion bonded transition joints is in structures consisting of dissimilar metals. Structural transition joints may be either flat or tubular joints for effecting permanent, strong, crevice-free and leak proof metallurgical weld between dissimilar metals and alloys.

The different areas of applications and most standard products offered are as below.

Ship Building & Ship Repair Yards

Explobond structural transition joints are composite strips made of Aluminium Magnesium alloy + Aluminium + Steel used in building & repairs of passengers ships, utility ships, naval vessels and offshore constructions,

Explobond Aluminium + Steel transition joints are also used on ship tankers transporting liquified natural gas. Huge spherical tanks of Aluminium are employed to hold LNG and clad transition joints are used to weld these aluminium spheres in position with the steel tanker body.

With increasing use of Aluminium bodies on construction of trucks and buses, Aluminium + Steel transition joints ease the problem of joining the aluminium parts to steel chassis.

In most of these vessels, the superstructure is made of aluminium alloys to be joined to the steel hull / body. Explobond structural transition joints provide a metallurgically strong crevice free and reliable joint between Aluminium alloy & steel. The Aluminium steel interface is smooth and can be securely protected by paints and is easy to maintain.

Explobond Aluminium + Steel transition joints are approved by LRS, ABS, IRS and the Indian Navy.

Typical Standard Explobond Clad Joints

Aluminium Magnesium Alloy: (AA 5083 / IS 54300) 6 mm thick

Aluminium: (AA 1050 / AA 1100 / IS 19500 / IS 19000) 3 mm to 12 mm thick

Carbon Steel: (Lloyds Grade A / IS 2062 / SA 515 Gr 55 & 60) 19 mm to 25 mm thick

Figure - Ship / Al + CS STJ

Composite thickness: A combination of above individual thickness.

Width: Standard widths are 20 mm; 25 mm; 30 mm; the empirical rule of joining aluminium and steel plate is to use a structural transition joint four times as wide as thickness of aluminium being welded to it. Any other widths are also possible.

Minimum Shear Strength: 5.4 kgs / mm2

Minimum Tensile Strength: 7.0 kgs / mm2