Galvalume

Overview

The application of metallic coatings by the continuous process of hot dipping is one of the most used forms for protection of steel. In this process, the metal strip is continuously immersed in a molten metal bath. Among the metal coatings suitable to the application of the heat immersion process, we can mention the Galvalume alloy.

Galvalume ® is a steel sheet coated with 55%Al43,5%Zn1,5%Si alloy and combines aluminum durability with galvanic zinc protection, providing excellent resistance to corrosion in marine and industrial environments compared to existing zinc coatings on the market, resistance to oxidation at high temperatures and superior thermal reflectivity associated with a pleasant and distinctive look compared to other similar coatings. Its characteristics of formability, weldability and painting ease, associated with its mechanical properties, make it appropriate for applications in several segments.

Coating

Product Description


Typical Crystallization

Galvalume® coating obtained by standard solidification of the deposited layer, resulting in a surface with crystals visible to the naked eye.

This type of coating is recommended for general use, particularly for applications in the construction industry, major appliances and auto parts.

Coating Standards
Technical Standard Coating Mass individual test (g/m²) Mass triple test (g/m²)
ASTM A792 AZM150 130 150
AZM165 150 165
AZM180 155 180
AZ50 131 153
AZ55 153 168
AZ60 159 183
NBR 15578 AZ150 130 150
AZ165 140 165
AZ180 155 180

Structural

Product Description

Structural steels are generally carbon manganese steel whose mechanical strength is obtained by a solid solution associated with thermo-mechanical processing conditions. These types of steel have high mechanical strength and are particularly suitable for sheet uses and applications that require simple folds and corrugations such as structural steel, storage silos and structures in general.

Available Dimensions and Examples of Standarts
Thickn. Min.
mm		 Thickn.Max.
mm		 Lgth.Min.
mm		 Lgth.Max
mm
0,3 1,55 700 1300
Thickn. Min
mín		 Thickn. Max
máx		 Lgth.Min
mín		 Lgth.Max
máx
(0,0118) (0,061) (27,56) (51,18)
Technical Norm Degree Mechanical Property
YL Min
[MPa] / KSI		 TS Min
[MPa] / KSI		 Elongation
Thickness Base Value %
ASTM A792 SS33/AZR230 [230] / 33 [310] / 45 Any 50 20
SS50/AZR340 (CL1) [340] / 50 [450] / 65 Any 50 12
SS50/AZR340 (CL2) [340] / 50 – / – Any 50 12
SS50/AZR340 (CL4) [340] / 50 [410] / 60 Any 50 12
SS80/AZR550 (CL1 e CL2) [550] / 80 [570] / 82 Any 50 –
SS80/AZR550 (CL1 e CL2 [550] / 80 [570] / 82 Any 50 3
NBR 15578 AZR230 [230] / 33 [310] / 45 Any 50 22
AZR345 [345] / 50 [430] / 62 Any 50 12
AZR550 [550] / 80 [570] / 82 Any 50 –

Stamping

Product Description

The steels with a requirement for stamping are steels of low carbon alloy concepts (average printing), ultra low carbon IF – Interstitial Free (deep to extra deep stamping) for applications requiring more critical conformational levels for the manufacture of the parts, intended for more complex stamping processes. Steels of this class are used in major appliances, like refrigerators, washing machines and microwaves. In the automotive industry, they are commonly used for radiators

Available Dimensions and Examples of Standarts
Thickn. Min
mm		 Thickn.Max.
mm		 Lgth.Min
mm		 Lgth.Max
mm
0,6 1,55 83 1350
Thickn. Min
(pol)		 Thickn. Max
(pol)		 Lgth. Min
(pol)		 Lgth. Max
(pol)
(0,0118) (0,061) (27,56) (51,18)
Technical Norm Degree Mechanical Property
YS Mín
[MPa] / KSI		 Elongation
Thickness Base Value %
(min)		 r n
ASTM A792 FS [170/275] 25/40 Any 50 24 1.0/1.4 0.16/0.20
DS [140/240] 35/60 Any 50 30 1.3/1.7 0.18/0.22

Commercial Quality

Product Description

Steels classified as commercial quality are simple alloy steels for applications which require less critical levels of conformation for the manufacture of the parts, recommended for bending, profiling and light stamping processes. Commercial quality steels are used in major appliances, like washing machines, refrigerators, stoves and microwaves, in applications such as cabinets, corners, doors and reinforcements in general and are also used in construction in structural profiles, roofing and side covers.

Available Dimensions and Examples of Standarts
Thickn. Min
mm		 Thickn. Max
mm		 Lgth. Min
mm		 Lgth. Max
mm
0,3 1,55 700 1300
Thickn. Min
(pol)		 Thickn. Max
(pol)		 Lgth. Max
(mm)		 Lgth. Max
(mm)
(0,0118) (0,061) (27,56) (51,18)
Technical Norm Degree Mechanical Property
YS Mín
[MPa] / KSI		 Elongation
Thickness Base Value (min)
%
ASTM A792 CS Type A [205/410] 30/60 Any 50 20
CS Type B [245/410] 35/60 Any 50 20
CS Type C [205/450] 30/65 Any 50 15
NBR 15578 AZC – – – –

Corrosion resistance

The excellent corrosion resistance of Galvalume is owed to a combination of galvanic protection provided by the zinc coating and protection by the mechanical aluminum barrier. The Galvalume steel is about 2 to 4 times more resistant to corrosion than galvanized steel.

COATING LOSS (m)
ENVIRONMENT Years of Exposure (A) Conventional Zinc (B)55% Al-Zn Alloy A / B Ratio
Marine – Severe 2.5 16.8 5.2 3.2
Industrial 7 9.8 3.4 2.9
Marine 4 5.9 1.4 4.2
Rural 4 1.4 0.8 1.8

Last update on June 2, 2021.

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