6061-T651 Aluminum Plate
6061-T651 Aluminum Plate Overview
6061-T651 Aluminum Plate is a heat-treated and stress-relieved Al-Mg-Si alloy plate widely used for precision machining, tooling, fixtures, structural components and general engineering applications.
The T651 temper indicates solution heat treatment, controlled stress relief by stretching and artificial aging. Compared with standard T6 condition, T651 is commonly selected for plate applications where dimensional stability during machining is important.
SASA ALUMINUM supplies 6061-T651 aluminum plate according to customer requirements for thickness, width, length, flatness, surface condition, cutting and downstream machining.
6061-T651 Plate Quick Information
Alloy / Temper: 6061-T651
Product Form: Aluminum Plate
Reference Standard: ASTM B209 / B209M or Agreed Specification
Main Features: Good Strength / Machinability / Corrosion Resistance / Dimensional Stability
Processing: Saw Cutting / CNC Machining / Drilling / Milling as Required
Surface: Mill Finish / Protective Film / Customized
Documentation: MTC and Inspection Documents Available as Required
6061-T651 Aluminum Plate Specifications
| Item | Specification |
|---|---|
| Alloy / Temper | 6061-T651 |
| Product Form | Aluminum Plate |
| Reference Standard | ASTM B209 / B209M or Customer Specification |
| Thickness | Customized According to Order Requirements |
| Width | Customized According to Order Requirements |
| Length | Standard / Cut-to-Size / Customized |
| Surface | Mill Finish / Protective Film / Customized |
| Flatness | According to Plate Thickness and Agreed Specification |
| Processing | Saw Cutting / CNC Machining / Drilling / Milling |
| Documentation | MTC / Inspection Documentation as Required |
What Does T651 Mean?
T651 is a stress-relieved temper based on the T6 heat-treated condition. After solution heat treatment and quenching, the plate is stretched to reduce residual stress and then artificially aged to develop the required mechanical properties.
| Processing Stage | Purpose |
|---|---|
| Solution Heat Treatment | Prepares the alloy for precipitation hardening. |
| Quenching | Retains alloying elements in a supersaturated solid solution. |
| Stress Relief by Stretching | Reduces residual stress and improves dimensional stability during machining. |
| Artificial Aging | Develops the final T651 strength condition. |
6061-T6 vs 6061-T651 Aluminum Plate
6061-T6 and 6061-T651 are closely related heat-treated conditions, but T651 includes an additional stress-relief step that makes it particularly useful for machining plate.
| Feature | 6061-T6 | 6061-T651 |
|---|---|---|
| Heat Treatment | Solution heat treated and artificially aged | T6 condition plus stress relief by stretching |
| Residual Stress | Standard T6 condition | Reduced residual stress |
| Machining Stability | Good | Preferred for heavy machining and dimensional stability |
| Typical Use | General structural and engineering components | Fixtures, tooling, machined plates and precision components |
6061 Aluminum Chemical Composition
| Element | Mg | Si | Cu | Cr | Fe | Mn | Zn | Ti | Al |
|---|---|---|---|---|---|---|---|---|---|
| 6061 | 0.8-1.2% | 0.4-0.8% | 0.15-0.40% | 0.04-0.35% | ≤0.70% | ≤0.15% | ≤0.25% | ≤0.15% | Balance |
6061-T651 Mechanical Properties
Mechanical properties vary with plate thickness and the applicable material specification. Final values should be verified against the ordered plate thickness and material certificate.
| Property | Typical Reference |
|---|---|
| Tensile Strength | Approx. 290 MPa or higher depending on thickness and specification |
| Yield Strength | Approx. 240 MPa or higher depending on thickness and specification |
| Elongation | Depends on plate thickness and test specimen requirements |
| Density | Approx. 2.70 g/cm³ |
Inspection Report & Quality Verification
SASA ALUMINUM provides inspection documentation to support material verification, dimensional control and shipment quality review. The following report includes PMI / spectrum verification and dimensional inspection records for an aluminum sheet batch.
| Report Item | Details |
|---|---|
| Report No. | SASA26070251978 |
| Product | Aluminum Sheet |
| Nominal Size | 1.5 × 1250 × 2600 mm |
| Quantity Checked | 70 pcs |
| PMI / Spectrum Test | Acceptable |
| Dimension Measurement | Acceptable |
| Measured Thickness | 1.498–1.499 mm |
| Measured Length | 2600.5 mm |
| Measured Width | 1250.5 mm |
Full Inspection Report Available
The complete PDF includes inspection records, dimensional measurement photos and calibration certificates for the measuring equipment.
Inspection results apply to the tested batch shown in the report and should not be interpreted as guaranteed values for all supplied material.
Machining & Fabrication
6061-T651 aluminum plate is widely selected for machined components because of its good machinability and reduced residual stress condition.
| Processing | Typical Use |
|---|---|
| Saw Cutting | Cut-to-size plate blanks for downstream machining |
| CNC Milling | Precision machined components, fixtures and tooling |
| Drilling & Tapping | Mounting holes, threaded features and assembly components |
| Surface Processing | Machined, anodized or coated surface requirements subject to project review |
Applications of 6061-T651 Aluminum Plate
| CNC Machining Precision machined parts | Tooling & Fixtures Jigs, fixtures and tooling plates | Structural Parts Frames and engineering components |
| Molds Mold bases and tooling components | Automation Machine plates and equipment components | Transportation Lightweight structural components |
Inspection & Quality Control
| Inspection Item | Purpose |
|---|---|
| Material Verification | Confirm 6061 alloy and T651 condition |
| Thickness Inspection | Verify plate thickness and tolerance |
| Dimensions | Check width, length and cut-to-size dimensions |
| Flatness | Check plate flatness according to agreed requirements |
| Surface Inspection | Check visible surface condition before shipment |
| Documentation | MTC and agreed inspection documents as required |
6061-T651 Aluminum Plate Packaging
Plate packaging is selected according to dimensions, thickness, surface condition and transportation requirements.
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Frequently Asked Questions
What is the difference between 6061-T6 and 6061-T651?
T651 is based on the T6 heat-treated condition but includes an additional stress-relief step by stretching. This makes T651 especially useful for plate that will undergo substantial machining.
Is 6061-T651 good for CNC machining?
Yes. 6061-T651 is widely used for CNC-machined components because of its machinability, strength and reduced residual stress condition.
Can 6061-T651 plate be cut to custom sizes?
Yes. Saw-cut blanks, rectangular plates and other cut-to-size requirements can be reviewed according to customer dimensions and tolerance requirements.
Is 6061-T651 suitable for structural applications?
Yes. 6061-T651 combines useful strength, corrosion resistance and fabrication performance for many structural and general engineering applications.
Can MTC and inspection documents be supplied?
Yes. Material certificates and agreed inspection documentation can be supplied according to confirmed order requirements.
Request a 6061-T651 Aluminum Plate Quote
Send your required thickness, width, length, quantity, tolerance and destination. SASA ALUMINUM will review the plate specification and processing requirements before confirming the offer.
