6061 T651 Aluminum Plate

In the industrial manufacturing sector, an aluminum plate that combines high strength, ease of processing, and stable corrosion resistance is often key to improving product quality and production efficiency. 6061 T651 aluminum plate, as a “star product” in the Al-Mg-Si alloy series, has become the preferred material for industries such as automotive manufacturing, aerospace, and precision instruments due to its excellent comprehensive performance.

1. 1. Basic material and mechanical properties

6061 belongs to the Al-Mg-Si heat-treatable strengthened aluminum alloy series. The T651 temper is a stable state achieved through solution treatment, artificial aging, and then stress relief through stretching. This is crucial for its adaptability to complex machining processes. Specific mechanical data are as follows:

– Tensile strength (σb): ≥310MPa, meaning it can withstand significant load impacts and meets fatigue resistance requirements;

– Yield strength (σ0.2): ≥276MPa, far exceeding pure aluminum and ordinary alloys, making it less prone to deformation during processing and improving subsequent assembly accuracy by at least 15%;

– Elongation (δ5): ≥8%, unlike high-hardness steel which is brittle, it is less prone to cracking during bending and stamping, and can easily handle 120° bending processes;

– Brinell hardness (HB): ≥95, providing excellent surface wear resistance, eliminating the need for additional hardening treatment when making parts, saving a processing cost.

These data are not theoretical values. Last month, we supplied 20 tons of goods to a German automotive parts supplier, and their random inspection results showed a 100% compliance rate for mechanical properties, fully conforming to the EU EN 485-2 standard.

2. 2. Chemical composition

Many customers worry that exported products won’t pass salt spray tests. The composition of aluminum plate 6061 T651 is specifically optimized for corrosion resistance:

– Magnesium (Mg): 0.8%-1.2%, a core strengthening element that forms the Mg2Si phase with silicon, improving strength without affecting processability;

– Silicon (Si): 0.4%-0.8%, works synergistically with magnesium, and controlling it within this range avoids the formation of brittle phases;

– Copper (Cu): 0.15%-0.4%, helps improve strength and is less prone to oxidation than high-copper alloys;

– Manganese (Mn): ≤0.15%, refines grain size, resulting in more uniform performance across the sheet;

– Other impurities (Fe, Zn, etc.): ≤0.15%, strictly controlled impurity content, which is why our material is more stable than products from smaller manufacturers.

Aluminum plates produced with this composition showed no obvious corrosion marks after 240 hours of neutral salt spray testing, fully meeting the usage requirements of different climates in Southeast Asia, Europe, and other regions.

3. 3. Specifications

We have been deeply involved in aluminum plate production and export for over ten years, with commonly available specifications covering most industrial applications. We also support customized solutions to minimize material waste for our customers. Commonly used specifications are as follows:

– Thickness: 0.8mm-100mm, from thin sheets for precision parts to thick sheets for equipment bases, all in stock;

– Width: 1000mm, 1220mm, 1500mm, 2000mm, can be cut to your required dimensions to reduce waste;

– Length: 2000mm-6000mm, supports custom cutting to directly match your stamping die dimensions.

Processing advantage of 6061 T651 aluminum plate:

Its cutting performance is rated “Excellent,” ensuring smooth chip removal during drilling and tapping, and reducing tool wear by 30% compared to ordinary aluminum plates; its weldability is also stable, with TIG welding achieving a weld strength of over 85% of the base material, eliminating the need for additional weld reinforcement. According to feedback from a new energy vehicle battery casing customer, after using this aluminum plate, the stamping pass rate increased from 88% to 96%, and production costs were significantly reduced.

6061 T651 aluminum plates are widely used in automotive parts, aerospace components, marine structural parts, precision instrument housings, medical devices, and other fields. As a professional aluminum plate exporter, we are familiar with the access standards of various countries. Each batch of goods can be provided with a complete Material Certificate (MTC) and SGS test report, conforming to multiple international standards such as ASTM B209 (USA), EN 485-2 (EU), and GB/T 3880 (China), completely eliminating customs clearance delays and ensuring higher quality.

For sample testing, please contact us to obtain samples of different thicknesses free of charge. If you need more accurate product quotations, customized specifications, or want to understand specific application scenarios, please feel free to contact our technical consultants. We will provide you with one-on-one professional service.