Aluminum 6110-T651
Temper
AA 6110 · UNS A96110 · EN AW-6110, AW 6110
T651 = t6, stress relieved by stretching
T6 properties with residual stress removed by controlled stretching — pick for plate or bar that will be heavily machined to tight tolerance.
Values for the T651 condition
Other 6110 tempers and conditions
6110 is listed in 6 conditions; see the grade overview at 6110.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Fully annealed for maximum cold formability or before re-solution treating; strength is low. | 70 | 135 | 26 | 40 HB | 47 % IACS |
Solution heat treated and naturally aged | Choose when parts must be stamped, bent or hemmed before a final paint-bake/T6 age to reach full strength. | 140 | 250 | 22 | 70 HB | 37 % IACS |
Solution heat treated and overaged (stabilized) | Over-aged for improved corrosion/IGC resistance and thermal stability, trading roughly 10 % of T6 strength. | 295 | 330 | 14 | 100 HB | 44 % IACS |
Cooled from hot working and artificially aged | Press-quenched extrusions aged without a separate solution treatment — lower cost and less distortion, ~10–15 % below T6 strength. | 300 | 340 | 10 | 105 HB | 42 % IACS |
T651This page T6, stress relieved by stretching | T6 properties with residual stress removed by controlled stretching — pick for plate or bar that will be heavily machined to tight tolerance. | 355 | 385 | 12 | 116 HB | 41 % IACS |
Solution heat treated and artificially aged | Standard supply condition: peak strength for automotive forgings, suspension parts and high-strength machined components. | 360 | 390 | 12 | 118 HB | 41 % IACS |
What is 6110-T651?
6110-T651 is 6110 in the T651 temper — t6 properties with residual stress removed by controlled stretching — pick for plate or bar that will be heavily machined to tight tolerance. 6110-T651 has a yield strength of 355 MPa (51.5 ksi) and a tensile strength of 385 MPa (55.8 ksi) — stronger than 84% of aluminum grades. Elongation at break is 12% and the elastic modulus is 70 GPa (10.2 Msi). 6110-T651 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 580°C (1,076 °F).
Advantages
- Easy to machine — 75/100, better than 86% of aluminum grades
- High strength — 355 MPa (51.5 ksi), better than 84% of aluminum grades
- Polishes to a fine finish — 65/100, better than 82% of aluminum grades
- High electrical conductivity — 41 % IACS, better than 78% of aluminum grades
- Conducts heat well — 160 W/m·K (92.4 BTU/hr·ft·°F), better than 76% of aluminum grades
6110-T651 properties
Typical room-temperature values for 6110-T651; 22 are specific to this condition. Other listed values are 6110 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
6110-T651 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 580°C (1,076 °F).
Mechanical12
6110-T651 has a yield strength of 355 MPa (51.5 ksi) and a tensile strength of 385 MPa (55.8 ksi) — stronger than 84% of aluminum grades. Elongation at break is 12% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
6110-T651 is rated for continuous service to 150°C (302 °F). It conducts heat at 160 W/m·K (92.4 BTU/hr·ft·°F), better than 76% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
6110-T651 conducts electricity at 41 % IACS, better than 78% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), better than 57% of aluminum grades.
Sustainability4
Producing a kilogram of 6110-T651 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 30%.
Manufacturability8
6110-T651's machinability is very good (75/100, better than 86% of aluminum grades); weldability good (58/100); formability fair (38/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 6110-T651
Is 6110 easy to machine?
Machines very well in T6 with polished-flute carbide, high speed and flood coolant or MQL; sharp rake and chip breakers avoid the gummy chips seen in T4.
Can 6110 be welded?
MIG/TIG weldable with 4043 (crack resistance) or 5356 (strength/anodizing match); HAZ drops to near-T4 strength, so re-solution + age or design joints away from peak stress.
Can 6110 be formed, bent or molded?
Extrudes and hot-forges readily above 400 °C; do sheet/tube bending in O or T4 and age afterwards — T6 has limited bend radius and springback is high.
What surface finishes work on 6110?
Takes clear and hard sulfuric anodizing well and accepts chromate/Ti-Zr conversion coats before e-coat; Cu content means decorative bright anodize may look slightly hazy.
6110 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Siwith Mg forms Mg2Si strengthening phase | 0.7 – 1.5 | 1 |
| Mg | 0.5 – 1.1 | 0.8 |
| Curaises strength, lowers corrosion resistance | 0.2 – 0.7 | 0.4 |
| Mngrain/recrystallisation control | 0.2 – 0.7 | 0.4 |
| Cr | 0.04 – 0.25 | 0.12 |
| Feimpurity limit | ≤ 0.8 | 0.3 |
| Znimpurity limit | ≤ 0.3 | — |
| Tigrain refiner | ≤ 0.15 | — |
| Others (each)total 0.15 max | ≤ 0.05 | — |
| Al | balance | — |
6110-T651 — frequently asked
What is 6110-T651 used for?
6110-T651 is typically used for forged suspension arms, pickup truck chassis components, extruded automotive structural sections, steering and control-arm forgings, high-strength machined brackets and load-bearing bolted fittings. In short: high-strength suspension forging.
What is the yield strength of 6110-T651?
6110-T651 has a typical yield strength of 355 MPa (51.5 ksi) and a tensile strength of 385 MPa (55.8 ksi) — stronger than 84% of aluminum grades. Strength varies by condition: see the 6 listed tempers.
Is 6110-T651 easy to machine?
Yes — machinability is rated very good (75/100, better than 86% of aluminum grades). Machines very well in T6 with polished-flute carbide, high speed and flood coolant or MQL; sharp rake and chip breakers avoid the gummy chips seen in T4.
Can 6110-T651 be welded?
Yes — weldability is rated good (58/100). MIG/TIG weldable with 4043 (crack resistance) or 5356 (strength/anodizing match); HAZ drops to near-T4 strength, so re-solution + age or design joints away from peak stress.
What surface finishes work on 6110-T651?
Takes clear and hard sulfuric anodizing well and accepts chromate/Ti-Zr conversion coats before e-coat; Cu content means decorative bright anodize may look slightly hazy.
Can 6110-T651 be formed, bent or molded?
Extrudes and hot-forges readily above 400 °C; do sheet/tube bending in O or T4 and age afterwards — T6 has limited bend radius and springback is high.
What is the maximum service temperature of 6110-T651?
6110-T651 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 6110-T651?
Yes — 6110-T651 is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 573-3 Aluminium and aluminium alloys — Chemical composition — CEN (2019)
- EN 755-2 Aluminium extruded rod/bar, tube and profiles — mechanical properties — CEN (2016)
- ASM Handbook Vol. 2: Properties and Selection — Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 19: Fatigue and Fracture — ASM International (1996)
- High-strength 6000-series automotive extrusion and forging alloy datasheets — Constellium / Alcoa (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.