6351-T6 and 6061-T6 aluminium are heat-treatable aluminium-magnesium-silicon alloys used in structural and machined components. They are not automatically interchangeable: the drawing, governing standard and required properties control selection.
Practical Comparison
| Factor | 6351-T6 | 6061-T6 |
|---|---|---|
| Market use | Often specified for extruded or structural products in selected markets | Widely specified for sheet, plate, bar, extrusion and machined parts |
| Strength | Can provide attractive structural strength under the applicable standard | Balanced strength, corrosion resistance and fabrication capability |
| Availability | Confirm product form, standard and mill availability early | Generally broad availability, subject to size and temper |
| Substitution | Requires approval against chemistry, mechanical properties, design code and service conditions | |
Choose the Product Form First
Plate is suitable for machined blocks, base plates and structural components; round bar supports shafts and turned parts. Product-form specifications can impose different tolerances, testing and property requirements even for the same nominal alloy and temper.
Quotation Checklist
| Material | Alloy, temper and governing standard |
|---|---|
| Form and size | Plate or bar; dimensions, tolerances and quantity |
| Processing | Cutting, machining allowance, surface and edge requirements |
| Quality | Certificate, mechanical tests, inspection and packing |
Compare the verified 6351-T6 aluminium plate and 6061-T6 aluminium round bar pages, then send the project specification for review.
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Review the related aluminum sheet and plate options. For a project-specific review, send the grade or alloy, dimensions, quantity, applicable standard, inspection requirements and destination.
Post time: Aug-14-2026