Standard Specification for Steel Coil, 55 % Aluminum-Zinc Alloy-Coated by the HotDip Process

Standard Specification for Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the HotDip Process

1. Classification of Aluminum - zinc Alloy - Coated by the Hot Dip process (Galvalume - GL)

The material is available in several designations, as follows:

- Commercial Steel—CS Types A, B, and C,
- Forming Steel—FS,
- Drawing Steel—DS,
- High Temperature Steel—HTS, and
- Structural Steel—SS.
Structural steel is available in several grades based on mechanical properties. Structural Steel Grade 50 [340] is available in three classes based on tensile strength. Structural Steel Grade 80 [550] is available in two classes, based on chemistry. The product is available in several coating weights
[masses] with the coating designation in accordance with this table

 2. Mechanical Properties of Aluminum - zinc Alloy - Coated by the Hot Dip process (Galvalume - GL)

Many interrelated factors that affect the ability of a steel to cold form over a given radius under shop conditions. These factors include thickness, strength level, degree of restraint, relationship to rolling direction, chemistry, and base metal microstructure. Lists the suggested minimum inside radii for 90° cold bending for Structural Steels. They presuppose “hard way” bending (bend axis parallel to the rolling direction) and reasonably good shop forming practices. Where possible, the use of larger radii or “easy way” bends are recommended for improved performance.
Fabricators should be aware that cracks may initiate upon bending a sheared or cold-worked edge. This is not considered to be a fault of the steel but is rather a function of the induced localized cold-work zone.
 
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