Aluminum 2009/SiC/15p-T7
Temper
also Alcoa 2009/SiC/15p
T7 = solution heat treated and overaged (stabilized)
Overaged for improved corrosion/exfoliation resistance and thermal stability at some loss of strength.
Values for the T7 condition
Other 2009/SiC/15p tempers and conditions
2009/SiC/15p is listed in 7 conditions; see the grade overview at 2009/SiC/15p.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition for maximum (still limited) formability and machining before solution treatment. | 170 | 300 | 12 | 75 HB | 40 % IACS |
As fabricated | Mill stock for subsequent forging or full heat treatment; no guaranteed mechanical properties. | 320 | 450 | 8 | 110 HB | 33 % IACS |
T4Default Solution heat treated and naturally aged | Standard supply condition for forged and extruded MMC parts: best combination of strength, ductility and toughness. | 365 | 550 | 7 | 125 HB | 26 % IACS |
Solution treated, stress-relieved by stretching, naturally aged | Extruded bar/profile stretched for low residual stress and straightness before machining to close tolerance. | 400 | 565 | 6 | 130 HB | 27 % IACS |
T7This page Solution heat treated and overaged (stabilized) | Overaged for improved corrosion/exfoliation resistance and thermal stability at some loss of strength. | 410 | 520 | 5 | 135 HB | 38 % IACS |
Solution heat treated and artificially aged | Choose for higher yield strength and dimensional stability at temperature, accepting reduced ductility and toughness. | 460 | 585 | 5 | 145 HB | 32 % IACS |
Solution heat treated, cold worked and artificially aged | Highest strength condition for sheet/extrusion where stiffness and yield dominate and ductility can be sacrificed. | 515 | 620 | 4 | 155 HB | 33 % IACS |
What is 2009/SiC/15p-T7?
2009/SiC/15p-T7 is 2009/SiC/15p in the T7 temper — overaged for improved corrosion/exfoliation resistance and thermal stability at some loss of strength. 2009/SiC/15p-T7 has a yield strength of 410 MPa (59.5 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 88% of aluminum grades. Elongation at break is 5% and the elastic modulus is 98 GPa (14.2 Msi). 2009/SiC/15p-T7 has a density of 2.84 g/cm³ (0.103 lb/in³), heavier than 93% of aluminum grades. It melts at 502°C (936 °F). T4 is the default condition FabDigit quotes; T7 is available on request or by drawing note.
Advantages
- Stiff — 98 GPa (14.2 Msi), better than 99% of aluminum grades
- High strength — 410 MPa (59.5 ksi), better than 88% of aluminum grades
- High service temperature — 175°C (347 °F), better than 83% of aluminum grades
- Conducts heat well — 165 W/m·K (95.3 BTU/hr·ft·°F), better than 79% of aluminum grades
Limitations
- Difficult to machine — 16/100, worse than 99% of aluminum grades
- High embodied carbon — 16 kg CO₂/kg, worse than 98% of aluminum grades
- Difficult to weld — 20/100, worse than 89% of aluminum grades
- Needs corrosion protection — 40/100, worse than 75% of aluminum grades
2009/SiC/15p-T7 properties
Typical room-temperature values for 2009/SiC/15p-T7; 22 are specific to this condition. Other listed values are 2009/SiC/15p reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
2009/SiC/15p-T7 has a density of 2.84 g/cm³ (0.103 lb/in³), heavier than 93% of aluminum grades. It melts at 502°C (936 °F).
Mechanical14
2009/SiC/15p-T7 has a yield strength of 410 MPa (59.5 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 88% of aluminum grades. Elongation at break is 5% and the elastic modulus is 98 GPa (14.2 Msi).
Thermal6
2009/SiC/15p-T7 is rated for continuous service to 175°C (347 °F). It conducts heat at 165 W/m·K (95.3 BTU/hr·ft·°F), better than 79% of aluminum grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
2009/SiC/15p-T7 conducts electricity at 38 % IACS, better than 61% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (40/100), worse than 75% of aluminum grades.
Sustainability4
Producing a kilogram of 2009/SiC/15p-T7 takes about 240 MJ of energy and emits 16 kg of CO₂ — more than 98% of aluminum grades. Typical recycled content is 2%.
Manufacturability7
2009/SiC/15p-T7's machinability is poor (16/100, worse than 99% of aluminum grades); weldability poor (20/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 2009/SiC/15p-T7
Is 2009/SiC/15p easy to machine?
Extremely abrasive — use PCD or CVD-diamond tooling, high speed/low feed, flood coolant; carbide tools wear within minutes and grinding/EDM are practical for finishing.
Can 2009/SiC/15p be welded?
Fusion welding is discouraged (Al₄C₃ formation, porosity, particle segregation); friction stir welding, diffusion bonding or mechanical fastening/adhesive bonding are the accepted joining routes.
Can 2009/SiC/15p be formed, bent or molded?
Supplied by powder blending, vacuum hot pressing and extrusion/forging; hot working at 400–480 °C only — cold forming is limited by 4–8 % ductility and minimum bend radii are large.
What surface finishes work on 2009/SiC/15p?
Anodizes unevenly because SiC particles do not convert; chromate/phosphate conversion coats plus primer are common, and shot peening improves fatigue life of machined surfaces.
2009/SiC/15p 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 |
|---|---|---|
| SiCvol % particulate reinforcement (≈17 wt %); typical mean particle size 3–10 µm | 14 – 16 | 15 |
| Cumatrix basis (2009 alloy) | 3.2 – 4.4 | 3.8 |
| Mgmatrix basis | 1 – 1.6 | 1.3 |
| Fematrix basis, low-Fe PM powder | ≤ 0.05 | 0.03 |
| Simatrix basis (excluding SiC) | ≤ 0.25 | 0.1 |
| Mnmatrix basis | ≤ 0.1 | 0.02 |
| Znmatrix basis | ≤ 0.1 | 0.02 |
| Others (each)total 0.15 max | ≤ 0.05 | — |
| Almatrix balance | balance | — |
2009/SiC/15p-T7 — frequently asked
What is 2009/SiC/15p-T7 used for?
2009/SiC/15p-T7 is typically used for fighter jet skin panels, aerospace fuselage components and military structural parts. In short: highest-strength SiC-Al composite; aerospace stiffness upgrade; powder-route 2000-series matrix.
What is the yield strength of 2009/SiC/15p-T7?
2009/SiC/15p-T7 has a typical yield strength of 410 MPa (59.5 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 88% of aluminum grades. Strength varies by condition: see the 7 listed tempers.
Is 2009/SiC/15p-T7 easy to machine?
Not especially — machinability is rated poor (16/100, worse than 99% of aluminum grades). Extremely abrasive — use PCD or CVD-diamond tooling, high speed/low feed, flood coolant; carbide tools wear within minutes and grinding/EDM are practical for finishing.
Can 2009/SiC/15p-T7 be welded?
Not readily — weldability is rated poor (20/100). Fusion welding is discouraged (Al₄C₃ formation, porosity, particle segregation); friction stir welding, diffusion bonding or mechanical fastening/adhesive bonding are the accepted joining routes.
What surface finishes work on 2009/SiC/15p-T7?
Anodizes unevenly because SiC particles do not convert; chromate/phosphate conversion coats plus primer are common, and shot peening improves fatigue life of machined surfaces.
Can 2009/SiC/15p-T7 be formed, bent or molded?
Supplied by powder blending, vacuum hot pressing and extrusion/forging; hot working at 400–480 °C only — cold forming is limited by 4–8 % ductility and minimum bend radii are large.
What is the maximum service temperature of 2009/SiC/15p-T7?
2009/SiC/15p-T7 is rated for continuous use to about 175°C (347 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 2009/SiC/15p-T4 and 2009/SiC/15p-O?
T4 is the default condition — standard supply condition for forged and extruded MMC parts: best combination of strength, ductility and toughness. O: softest condition for maximum (still limited) formability and machining before solution treatment. Yield strength is 365 MPa in T4 versus 170 MPa in O.
Sources
- ASM Handbook, Vol. 21: Composites — Discontinuously Reinforced Aluminum — ASM International (2001)
- ASM Handbook, Vol. 2: Properties and Selection — Nonferrous Alloys — ASM International (1990)
- ANSI H35.5 — Nomenclature System for Aluminum Metal-Matrix Composites — The Aluminum Association (1997)
- DWA Aluminum Composites / Alcoa 2009-SiC particulate MMC product data — DWA / Alcoa (2005)
- MMC mechanical and physical property compilations (MIL-HDBK-5/MMPDS supplementary MMC data) — US DoD / MMPDS (2003)
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.