Alusi^® is a flat carbon steel product coated on both sides with an aluminium-silicon alloy. The coating is composed of 90% aluminium and 10% silicon and is applied by means of a continuous hot dip galvanising process. Alusi^® is available in a wide range of steel grades: steels for cold forming and deep drawing applications, and structural steels. 

Alusi^® is particularly suitable for applications requiring high resistance to oxidation at high temperatures. Up to 450°C, the top surface of the Alusi^® coating does not alter and its thermal and light reflectivity remains at 80%, which is an important requirement for thermal shielding applications. The presence of silicon allows the coating to be used at temperatures as high as 650°C without flaking.

A passivating layer of aluminium oxide is formed instantly in contact with the oxygen present in air. Since this passivation protection renews itself naturally when damaged (scratches), the coating offers excellent resistance to corrosion and chemical attacks.

Because Alusi^® can resist high temperatures, it is particularly suitable for use in thermal shielding. However, Alusi^® also has many other applications:

• General industry: exhaust systems, thermal shields, heating equipment, boilers, ducts, fume exhaust pipes, heat exchangers, industrial ovens etc 
• Building: fire doors etc
• Domestic appliances: ovens, deep fryers, toasters, barbecues etc

Alusi^® can be supplied oiled and/or with a chemical surface treatment, or with an Easyfilm^® thin organic coating (please see data sheet E80 for the specific properties of Easyfilm^®).   

Under certain conditions, Alusi^® is suitable for food contact, as specified in the Regulation (EC) No. 1935/2004 and French standard NF A 36-712-2. Please contact us for further information on this subject.

Alusi^® must be transported and stored in a sheltered, moisture-free environment.

The forming and joining techniques currently used for uncoated steel are also suitable for Alusi^®.

Alusi^® coated steel can be welded using various types of resistance welding processes (spot, seam, butt welding). TIG, MIG and MAG are also suitable.
When supplied oiled, Alusi^® needs degreasing and surface treatment before painting.

Alusi^® coated with an Easyfilm^® thin organic coating can be painted directly, without any prior surface treatment. However, the paint must be compatible with the Easyfilm^® resin.

For other coating thicknesses, please contact us.

Steels for cold forming and deep drawing applications

Structural steels

High Strength Low Alloy steels

Steels for cold forming and deep drawing applications

Full table

Thickness (mm)	Min width	DX51D +AS EN 10346, DX52D +AS EN 10346	DX53D +AS EN 10346, DX54D +AS EN 10346	DX55D +AS EN 10346	DX56D +AS EN 10346	DX57D +AS EN 10346
		Max width	Max width	Max width	Max width	Max width
0.30 ≤ th < 0.40	750	1150	1150	1150	-	-
0.40 ≤ th < 0.50		1250	1250	1250	1250
0.50 ≤ th < 0.55		1300	1280	1280	1300
0.55 ≤ th < 0.60		1400	1400	1400	1400
0.60 ≤ th < 0.70		1525	1525	1525	1525
0.70 ≤ th < 0.90						1400
0.90 ≤ th < 1.80		1700	1700
1.80 ≤ th < 2.00		1600	1600			-
2.00 ≤ th < 2.50		1440	1440	1440
2.50 ≤ th < 2.65		1370	1370	1370	-
2.65 ≤ th < 3.00		1200	1200	1200

DX51D +AS EN 10346

DX51D +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.40	750	1150
0.40 ≤ th < 0.50		1250
0.50 ≤ th < 0.55		1300
0.55 ≤ th < 0.60		1400
0.60 ≤ th < 0.70		1525
0.70 ≤ th < 0.90
0.90 ≤ th < 1.80		1700
1.80 ≤ th < 2.00		1600
2.00 ≤ th < 2.50		1440
2.50 ≤ th < 2.65		1370
2.65 ≤ th < 3.00		1200

DX52D +AS EN 10346

DX52D +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.40	750	1150
0.40 ≤ th < 0.50		1250
0.50 ≤ th < 0.55		1300
0.55 ≤ th < 0.60		1400
0.60 ≤ th < 0.70		1525
0.70 ≤ th < 0.90
0.90 ≤ th < 1.80		1700
1.80 ≤ th < 2.00		1600
2.00 ≤ th < 2.50		1440
2.50 ≤ th < 2.65		1370
2.65 ≤ th < 3.00		1200

DX53D +AS EN 10346

DX53D +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.40	750	1150
0.40 ≤ th < 0.50		1250
0.50 ≤ th < 0.55		1280
0.55 ≤ th < 0.60		1400
0.60 ≤ th < 0.70		1525
0.70 ≤ th < 0.90
0.90 ≤ th < 1.80		1700
1.80 ≤ th < 2.00		1600
2.00 ≤ th < 2.50		1440
2.50 ≤ th < 2.65		1370
2.65 ≤ th < 3.00		1200

DX54D +AS EN 10346

DX54D +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.40	750	1150
0.40 ≤ th < 0.50		1250
0.50 ≤ th < 0.55		1280
0.55 ≤ th < 0.60		1400
0.60 ≤ th < 0.70		1525
0.70 ≤ th < 0.90
0.90 ≤ th < 1.80		1700
1.80 ≤ th < 2.00		1600
2.00 ≤ th < 2.50		1440
2.50 ≤ th < 2.65		1370
2.65 ≤ th < 3.00		1200

DX55D +AS EN 10346

DX55D +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.40	750	1150
0.40 ≤ th < 0.50		1250
0.50 ≤ th < 0.55		1280
0.55 ≤ th < 0.60		1400
0.60 ≤ th < 0.70		1525
0.70 ≤ th < 0.90
0.90 ≤ th < 1.80
1.80 ≤ th < 2.00
2.00 ≤ th < 2.50		1440
2.50 ≤ th < 2.65		1370
2.65 ≤ th < 3.00		1200

DX56D +AS EN 10346

DX56D +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.40	750	-
0.40 ≤ th < 0.50		1250
0.50 ≤ th < 0.55		1300
0.55 ≤ th < 0.60		1400
0.60 ≤ th < 0.70		1525
0.70 ≤ th < 0.90
0.90 ≤ th < 1.80
1.80 ≤ th < 2.00
2.00 ≤ th < 2.50
2.50 ≤ th < 2.65		-
2.65 ≤ th < 3.00

DX57D +AS EN 10346

DX57D +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.40	750	-
0.40 ≤ th < 0.50
0.50 ≤ th < 0.55
0.55 ≤ th < 0.60
0.60 ≤ th < 0.70
0.70 ≤ th < 0.90		1400
0.90 ≤ th < 1.80
1.80 ≤ th < 2.00		-
2.00 ≤ th < 2.50
2.50 ≤ th < 2.65
2.65 ≤ th < 3.00

Prev grade Next grade

Structural steels

Full table

Thickness (mm)	Min width	S250GD +AS EN 10346, S280GD +AS EN 10346	S320GD +AS EN 10346, S350GD +AS EN 10346
		Max width	Max width
0.30 ≤ th < 0.35	800	1150	-
0.35 ≤ th < 0.45		1250	1250
0.45 ≤ th < 0.55
0.55 ≤ th < 0.60		1400	1300
0.60 ≤ th < 1.00		1525	1500
1.00 ≤ th < 1.60
1.60 ≤ th < 2.00
2.00 ≤ th < 2.50		1440	-
2.50 ≤ th < 3.00		1200

S250GD +AS EN 10346

S250GD +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.35	800	1150
0.35 ≤ th < 0.45		1250
0.45 ≤ th < 0.55
0.55 ≤ th < 0.60		1400
0.60 ≤ th < 1.00		1525
1.00 ≤ th < 1.60
1.60 ≤ th < 2.00
2.00 ≤ th < 2.50		1440
2.50 ≤ th < 3.00		1200

S280GD +AS EN 10346

S280GD +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.35	800	1150
0.35 ≤ th < 0.45		1250
0.45 ≤ th < 0.55
0.55 ≤ th < 0.60		1400
0.60 ≤ th < 1.00		1525
1.00 ≤ th < 1.60
1.60 ≤ th < 2.00
2.00 ≤ th < 2.50		1440
2.50 ≤ th < 3.00		1200

S320GD +AS EN 10346

S320GD +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.35	800	-
0.35 ≤ th < 0.45		1250
0.45 ≤ th < 0.55
0.55 ≤ th < 0.60		1300
0.60 ≤ th < 1.00		1500
1.00 ≤ th < 1.60
1.60 ≤ th < 2.00
2.00 ≤ th < 2.50		-
2.50 ≤ th < 3.00

S350GD +AS EN 10346

S350GD +AS EN 10346

Thickness (mm)	Min width	Max width
0.30 ≤ th < 0.35	800	-
0.35 ≤ th < 0.45		1250
0.45 ≤ th < 0.55
0.55 ≤ th < 0.60		1300
0.60 ≤ th < 1.00		1500
1.00 ≤ th < 1.60
1.60 ≤ th < 2.00
2.00 ≤ th < 2.50		-
2.50 ≤ th < 3.00

Prev grade Next grade

High Strength Low Alloy steels

Full table

Thickness (mm)	Min width	HX260LAD +AS EN 10346, HX300LAD +AS EN 10346, HX340LAD +AS EN 10346, HX380LAD +AS EN 10346, HX420LAD +AS EN 10346
		Max width
0.35 ≤ th < 0.45	800	1250
0.45 ≤ th < 0.55		1300
0.55 ≤ th < 0.60		1500
0.60 ≤ th < 2.00

HX260LAD +AS EN 10346

HX260LAD +AS EN 10346

Thickness (mm)	Min width	Max width
0.35 ≤ th < 0.45	800	1250
0.45 ≤ th < 0.55		1300
0.55 ≤ th < 0.60		1500
0.60 ≤ th < 2.00

HX300LAD +AS EN 10346

HX300LAD +AS EN 10346

Thickness (mm)	Min width	Max width
0.35 ≤ th < 0.45	800	1250
0.45 ≤ th < 0.55		1300
0.55 ≤ th < 0.60		1500
0.60 ≤ th < 2.00

HX340LAD +AS EN 10346

HX340LAD +AS EN 10346

Thickness (mm)	Min width	Max width
0.35 ≤ th < 0.45	800	1250
0.45 ≤ th < 0.55		1300
0.55 ≤ th < 0.60		1500
0.60 ≤ th < 2.00

HX380LAD +AS EN 10346

HX380LAD +AS EN 10346

Thickness (mm)	Min width	Max width
0.35 ≤ th < 0.45	800	1250
0.45 ≤ th < 0.55		1300
0.55 ≤ th < 0.60		1500
0.60 ≤ th < 2.00

HX420LAD +AS EN 10346

HX420LAD +AS EN 10346

Thickness (mm)	Min width	Max width
0.35 ≤ th < 0.45	800	1250
0.45 ≤ th < 0.55		1300
0.55 ≤ th < 0.60		1500
0.60 ≤ th < 2.00

Prev grade Next grade

Steels for cold forming and deep drawing applications

Structural steels

High Strength Low Alloy steels

Steels for cold forming and deep drawing applications

Structural steels

High Strength Low Alloy steels