Gwangyang Aluminum Sheet Grade ENAW 5251 0/H111
Information about Aluminum Sheet Grade ENAW 5251
Designed for general sheet metalwork, 5251 is an alloyed non-heat treatable aluminium sheet product which is ideal for applications where a greater degree of formability is required combined with higher mechanical property characteristics.
The alloy is internationally recognised as EN AW 5251 H22 and is AlMg2 hardened to the quarter-hard temper. 5251 aluminium supplied by Thames will meet all appropriate domestic and international standards.
Key Benefits
Typical commercial applications include:
Superior corrosion resistance
Good surface finish with very good anodising qualities
Great combination of formability and strength
Very good welding characteristics
Corrosion Resistance
This aluminium sheet alloy offers superior corrosion resistance in typical, industrial and marine environments.
Surface Treatment
5251 provides good anodising properties from both a decorative and technical perspective and finds use in industrial applications and architectural work.
Machining
Compared to pure aluminium, 5251 offers higher strength and extra hardness, resulting in improved machinability. Whilst not quite as good as heat-treated alloys, 5251 has reasonable machinability for its intended application. Heat-treated alloys may have greater hardness but reduced formability. Aluminium geometry cutting tools are recommended, which should be run at a moderate speed to avoid edge build-up.
Welding
5251 aluminium may be welded by MIG or TIG processes. A good weld should have a strength of up to 160MPa - this is based on the quality of the welding and weld type. Recommended filler metals include 5056A or 5154A for welding to 5251 structures.
Temper Types
The most common tempers for 5251 aluminium are:
H24 - Work hardened by rolling then annealed to half hard
H26 - Work hardened by rolling then annealed to three quarter hard
H22 - Work hardened by rolling then annealed to quarter hard
O - Soft.
Chemical Compositions
| Element | % Present |
|---|---|
| Manganese (Mn) | 0.1 - 0.50 |
| Iron (Fe) | 0.50 Typical |
| Copper (Cu) | 0.15 Typical |
| Magnesium (Mg) | 1.7 - 2.40 |
| Silicon (Si) | 0.40 Typical |
| Zinc (Zn) | 0.15 Typical |
| Chromium (Cr) | 0.15 Typical |
| Titanium (Ti) | 0.15 Typical |
| Aluminium (Al) | Balance |
Mechanical properties at room temperature
| Property | Value |
|---|---|
| Proof Strength | 165 MPa |
| Tensile Strength | 210 MPa |
| Elongation | 14% |
| Shear Strength | 125 MPa |
| Hardness Vickers | 65 HV |
Reference data for some physical properties (for guidance only)
| Property | Value |
|---|---|
| Density | 2.69 Kg/m3 |
| Melting Point | 625 °C |
| Thermal Expansion | 25 x 10-6 /K |
| Modulus of Elasticity | 70 GPa |
| Thermal Conductivity | 134W/m.K |
| Electrical Resistivity | 0.044 x 10-6 Ω .m |
