2014 T651 and T6 Aluminum Rod Selection

Manufacturing process
T6 aluminum alloy bar after solution heat treatment and water-cooled quenching process, rapid cooling to obtain high strength, but the internal residual stress is larger, easy to deform when directly machining.T651 in T6 based on the addition of cold stretching process, through mechanical stretching to eliminate internal stress, so that the material stress distribution is more uniform, subsequent processing of the T651 aluminum bar stability significantly improved.

Mechanical properties
T6 state aluminum alloy bar has higher tensile strength and hardness (e.g., tensile strength up to 205 MPa), which is suitable for load-bearing structures or mechanical support parts that require high strength. t651 balances strength and toughness through the tensile treatment, and although the ultimate strength is slightly lower than that of t6, the deformation-resistant ability is stronger, which is especially suitable for parts that require precision machining or complex molding.

Processing and Applications
Due to high internal stress, T6 bar needs to be reserved for deformation allowance when cutting or welding, and is commonly used in scenarios that require high strength but average precision, such as architectural brackets and frames, etc. Due to uniform stress, T651 bar can be directly used in areas that require high dimensional stability, such as parts of precision instruments and mold accessories, without secondary leveling after processing, and with a smoother and more uniform oxidation-treated surface.

Surface and Durability
Both of them have good corrosion resistance and oxidized coloring performance. T6 has slightly better corrosion resistance in humid or salt spray environment due to denser grain structure; while T651 has less deformation after welding or deep processing due to elimination of internal stresses, which is suitable for scenarios that require multiple welding or fine surface treatment.

Suggestions for selection
If high strength and high hardness are the priority needs (such as mechanical load bearing shafts and high load connectors), T6 is more suitable; if both processing accuracy, low deformation rate and surface treatment stability are needed (such as precision mold mandrels and complex structural components), T651's comprehensive performance is better.

Export Control Notice - These Grades Cannot Be Exported

2014 aluminum falls within these categories and is not available for export.

High-strength aluminum alloys of this class are listed under the export control regulations of the People's Republic of China for dual-use items and technologies. Shipping them out of China requires an export licence issued by the competent Chinese authorities. In practice a licence is not obtained for ordinary commercial orders in these categories, so GNEE does not export them.

GNEE does not export to any party or destination prohibited under applicable export control and international sanctions laws.

Control status technically turns on six variables: alloy grade, temper, product form, dimensions, quantity and intended end-use. Whatever the combination, none of the grades in the table below are available for export from GNEE.

Aluminum grades affected by these controls

Strength values in this table are indicative reference ranges used for control classification. They are not specification minimums. The governing limits for any enquiry come from the applicable standard or your drawing.

What we can quote instead

We cannot accept export enquiries for the grades listed above. If strength is the reason you are looking at them, send us the load case, the service environment and the fabrication method, and we will quote a non-controlled substitute - usually from the 5xxx or 6xxx series - with properties that fit the job and no export restriction attached.