Aluminium Plate: Grades, Sizes & Complete Buying Guide for Malaysia

What Defines an Aluminium Plate?

In the aluminium industry, the distinction between “sheet” and “plate” is based purely on thickness. According to standard industry classification used across manufacturers and suppliers:

This isn’t just a naming convention – it affects pricing, application suitability, and how the material is fabricated. Plate-grade material is typically used where structural integrity, load-bearing capacity, or impact resistance is required. For a deeper comparison, see our guide on aluminium sheet vs aluminium plate.

Common Grades and Their Properties

Not all aluminium is created equal. The grade (or alloy number) tells you what other metals have been mixed with aluminium to give it specific properties. Here are the four grades most commonly stocked in Malaysia:

Grade 1100 – Commercially Pure Aluminium

With a minimum of 99% aluminium content, Grade 1100 is the softest and most ductile option. It offers excellent corrosion resistance and is easy to form, but has relatively low strength. It’s best suited for chemical storage tanks, food processing equipment, and general sheet metal work where strength is not the primary concern.

Grade 5052 – The All-Rounder

Grade 5052 contains 2.2–2.8% magnesium, making it one of the most versatile aluminium alloys available. According to Industrial Metal Supply, it offers a balanced combination of corrosion resistance, formability, and weldability. This makes it ideal for marine components, signage, roofing panels, and automotive parts – applications where the material needs to handle outdoor exposure without degrading.

Grade 5083 – The Marine Specialist

5083 delivers the highest strength among non-heat-treatable aluminium alloys. As noted by Capral Aluminium, it’s specifically engineered for extreme environments – shipbuilding, offshore structures, and pressure vessels. If your project involves constant seawater exposure, 5083 is the specification to look for.

Grade 6061 – The Structural Workhorse

6061 is a heat-treatable alloy containing magnesium and silicon. In its T6 temper, it achieves a tensile strength of approximately 310 MPa – making it the go-to choice for structural applications. According to Fonnov Aluminium, it excels in CNC machining, milling, and drilling operations, and is widely used in construction frames, bridge components, and industrial machinery.

Standard Sizes Available in Malaysia

Plate-grade aluminium in Malaysia is typically stocked in the following standard sheet sizes (width × length):

Source: Chalco Aluminium

The most commonly ordered size in Malaysia is 1220mm × 2440mm (4′ × 8′) – this is the standard “full sheet” that most suppliers stock across all grades. For projects requiring larger panels, 1500 × 3000 and above are available but may require advance ordering.

At NY Hardware, custom cutting is available for all sizes – so you can order material cut to your exact dimensions rather than paying for offcuts you won’t use.

Thickness Options

Plate-grade aluminium (6mm and above) is available in the following standard thicknesses:

Weight calculated using aluminium density of 2.70 g/cm³ per Speciality Metals

One of the key advantages of this material over steel is weight. With a density of just 2.70 g/cm³ compared to steel’s 7.85 g/cm³, aluminium weighs roughly one-third of the equivalent steel plate – a critical factor in applications where weight reduction matters, such as transportation, building facades, and portable equipment.

How to Choose the Right Grade for Your Project

Selecting the right grade doesn’t have to be complicated. Ask yourself these three questions:

1. Will it be exposed to moisture or seawater?

If yes, you need a 5000-series alloy. Choose 5052 for general outdoor or marine exposure, or 5083 for full seawater immersion and offshore structures.

2. Does it need to bear structural load?

If the plate is part of a load-bearing structure – a frame, a bracket, a machine base – go with 6061-T6. Its heat-treated strength of 310 MPa makes it suitable for structural applications where rigidity matters.

3. Is formability the priority?

If the plate needs to be bent, rolled, or deep-drawn, 1100 or 5052 are your best options. Trying to bend 6061-T6 without proper equipment will likely result in cracking.

Sustainability: Why Aluminium Is a Future-Proof Material

Beyond performance, this material has a compelling sustainability story. According to the International Aluminium Institute, 75% of all aluminium ever produced since 1888 is still in use today – thanks to its ability to be recycled infinitely without losing its properties.

Recycling aluminium uses just 5% of the energy required to produce it from raw ore. In construction and automotive markets, recycling rates reach up to 90%. For contractors and developers in Malaysia working towards green building certifications, specifying aluminium contributes directly to sustainability targets.

Conclusion

Buying aluminium plate isn’t just about picking a thickness and placing an order. The grade determines how it performs, the size determines how much waste you generate, and the thickness determines whether it can handle the job. Understanding these three variables puts you in a position to buy smart – and avoid the costly mistakes that come from under-specifying or over-ordering.

At NY Hardware, we stock aluminium plate across all common grades, thicknesses, and sizes – with custom cutting services to reduce waste and save you money. Whether you need a single piece for a prototype or bulk supply for a construction project, our team can help you specify the right material.

For more on choosing between sheet and plate, read our guide on aluminium sheet vs aluminium plate. Or if you’re looking for pricing information, check out what affects aluminium plate pricing in Malaysia.