Welding
TIG and MIG with 5xxx filler wire (for example ER5356). Weld zones soften towards O-temper strength.
GB-standard Al-Mg plate
5A02 Aluminium Plate & Sheet
5A02, formerly designated LF2, is a Chinese-standard aluminium-magnesium alloy with about 2.4 % magnesium, closely comparable to 5052. It offers good weldability, high corrosion resistance and good formability, and is specified on drawings that follow GB standards. Metline supplies 5A02 plate and sheet in O, H14, H24 and H112 to GB/T 3880, worldwide.
- Alloy
- 5A02 (LF2, Al-Mg 2.4)
- Tempers
- O, H14, H24, H32, H112
- Thickness
- 0.5 – 100 mm
- Standards
- GB/T 3880 · GB/T 3190
What is 5A02 aluminium?
5A02 is a non-heat-treatable "rust-proof" aluminium alloy (the old name LF2 means rust-proof aluminium number 2). With 2.0 – 2.8 % magnesium and a small manganese or chromium addition, it behaves very much like 5052.
The alloy is strengthened by cold work. In O temper it is very ductile and welds easily; in H14, H24 and H32 it gains strength while still bending well. Its corrosion resistance in fresh water, seawater and marine air is high, and it machines reasonably in the harder tempers. Typical uses include fuel and oil lines, tanks, flanges, ship and vehicle interiors, rivet stock and housings for gas-insulated switchgear.
Buyers usually meet 5A02 on drawings for equipment designed to Chinese GB standards. Where the drawing allows an equivalent, 5052 to ASTM B209 or EN 485 is the nearest internationally stocked grade; the chemistry is close but not identical, so check acceptance with the designer.
5A02 chemical composition (wt %)
| Element | 5A02 (GB/T 3190) | 5052 (ASTM / EN) for comparison |
|---|---|---|
| Silicon (Si) | ≤ 0.40 | ≤ 0.25 |
| Iron (Fe) | ≤ 0.40 | ≤ 0.40 |
| Si + Fe | ≤ 0.6 | — |
| Copper (Cu) | ≤ 0.10 | ≤ 0.10 |
| Manganese (Mn) or chromium (Cr) | 0.15 – 0.40 | Mn ≤ 0.10; Cr 0.15 – 0.35 |
| Magnesium (Mg) | 2.0 – 2.8 | 2.2 – 2.8 |
| Zinc (Zn) | — | ≤ 0.10 |
| Titanium (Ti) | ≤ 0.15 | — |
| Aluminium (Al) | Remainder | Remainder |
5A02 limits as listed in GB/T 3190; confirm the edition on your drawing. The mill certificate reports the actual analysis.
5A02 mechanical properties
GB/T 3880.2 sets minimum properties by temper and thickness. The figures below are indicative ranges for comparison; for acceptance, use the table in the edition named on your order and the values on the mill certificate.
| Temper | Tensile strength (indicative) | Elongation (indicative) | Comparable 5052 typical |
|---|---|---|---|
| O | about 165 – 225 MPa | ≥ 16 – 18 % | 193 MPa, 25 % |
| H14 / H24 / H32 | about 225 MPa and above | a few per cent, by thickness | 228 – 262 MPa |
| H112 plate | about 155 – 175 MPa minimum, by thickness | by thickness | — |
Physical properties (typical)
- Density
- about 2.68 g/cm³
- Modulus of elasticity
- about 70 GPa
- Coefficient of thermal expansion
- about 24 µm/m·°C
5A02 sizes and weights
Supply range
- Thickness
- Sheet 0.5 – 6 mm (mainly O and H14/H24); plate 6 – 100 mm (mainly H112)
- Width
- 1000, 1200, 1250, 1500 mm; other widths on request
- Length
- 2000, 2500, 3000 mm or cut-to-size
- Surface
- Mill finish, PVC film one or both sides, paper interleaving
- Processing
- Shearing, saw cutting, laser and waterjet blanks
5A02 weighs about 2.68 kg per m² for each millimetre of thickness.
| Thickness (mm) | kg per m² | 1000 × 2000 mm (kg) | 1250 × 2500 mm (kg) | 1500 × 3000 mm (kg) |
|---|---|---|---|---|
| 1 | 2.68 | 5.4 | 8.4 | 12.1 |
| 1.5 | 4.02 | 8.0 | 12.6 | 18.1 |
| 2 | 5.36 | 10.7 | 16.8 | 24.1 |
| 3 | 8.04 | 16.1 | 25.1 | 36.2 |
| 4 | 10.72 | 21.4 | 33.5 | 48.2 |
| 5 | 13.40 | 26.8 | 41.9 | 60.3 |
| 6 | 16.08 | 32.2 | 50.2 | 72.4 |
| 8 | 21.44 | 42.9 | 67.0 | 96.5 |
| 10 | 26.80 | 53.6 | 83.8 | 120.6 |
| 12 | 32.16 | 64.3 | 100.5 | 144.7 |
| 16 | 42.88 | 85.8 | 134.0 | 193.0 |
| 20 | 53.60 | 107.2 | 167.5 | 241.2 |
| 25 | 67.00 | 134.0 | 209.4 | 301.5 |
| 30 | 80.40 | 160.8 | 251.3 | 361.8 |
| 40 | 107.20 | 214.4 | 335.0 | 482.4 |
| 50 | 134.00 | 268.0 | 418.8 | 603.0 |
Fabrication, applications and packing
Forming
O and H24 bend and draw well; harder tempers need larger radii.
Machining
Fair in harder tempers; gummy when annealed. Use sharp tools and lubricant.
- Fluid systems: fuel and lubricating oil lines, tanks and storage vessels
- Electrical: housings for high-voltage gas-insulated switchgear (GIS)
- Transport: ship and vehicle interiors, panels and flanges
- Fasteners: rivet wire and rod drawn from 5A02
Export packing: interleaving paper or film between sheets, moisture-barrier wrap with desiccant, edge protectors, and ISPM 15 wooden pallets or cases secured with straps.
How to order 5A02
- SpecifyAlloy and temper (e.g. 5A02-H24), thickness, size, quantity, GB standard edition (or accepted equivalent such as 5052 to ASTM B209) and surface needs.
- QuoteWe confirm alloy, temper, tolerances, certification, packing and delivery terms (EXW, FOB, CIF or DAP) for your destination.
- ProcessSheets and plates are cut, filmed if required and inspected.
- DocumentEach delivery carries a mill test certificate to EN 10204 3.1 with the cast analysis and mechanical test results; third-party inspection can be arranged on request.
- ShipSheets and plates are interleaved or film-protected, packed in seaworthy wooden cases or on pallets, and shipped by sea or air on EXW, FOB, CIF or DAP terms.
References and standards
- GB/T 3190 – Chemical composition of wrought aluminium and aluminium alloys
- GB/T 3880.1 to .3 – Wrought aluminium and aluminium alloy plates, sheets and strips for general engineering
- ASTM B209 – Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate
- The Aluminum Association – International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets)
5A02 aluminium plate: frequently asked questions
What is the international equivalent of 5A02?
5052 is the closest match. Both have about 2.2 – 2.8 % magnesium; 5A02 allows manganese or chromium as the minor addition, whereas 5052 uses chromium. Confirm with the designer before substituting.
What does LF2 mean?
LF2 is the former Chinese designation for 5A02, from the pinyin for "rust-proof aluminium" number 2.
Is 5A02 suitable for marine use?
Yes, it has good resistance to seawater and marine atmospheres, similar to 5052.
Can 5A02 be heat-treated?
No. It is non-heat-treatable; strength comes from cold work and is reduced by annealing.
Which standard covers 5A02 plate?
GB/T 3880 for plate, sheet and strip, with chemistry in GB/T 3190.
Need 5A02 plate or sheet?
Send the temper, thickness, sizes, quantity and standard. We will confirm availability, or an accepted equivalent, and a delivered price.
