2124/SiC/25p T8
Temper
T8 = solution heat treated, cold worked and artificially aged
Pick when maximum yield strength and dimensional stability are needed and low ductility is acceptable.
Values for the T8 condition
Other 2124/SiC/25p grades and fills
2124/SiC/25p is listed in 5 conditions; see the grade overview at 2124/SiC/25p.
Compare all 5 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Annealed | Chosen only for maximum workability during secondary forming or for stress-free machining blanks. | 180 | 300 | 8 | — |
As fabricated | Stock condition for billet, blanks and parts that will be heat treated after machining. | 330 | 450 | 5 | — |
Solution heat treated and naturally aged | Use where some extra ductility and toughness are wanted before final forming or where natural ageing is sufficient. | 400 | 560 | 5 | — |
T6Default Solution heat treated and artificially aged | Standard high-strength/high-stiffness condition for extruded or forged MMC structural parts. | 480 | 620 | 3 | — |
T8This page Solution heat treated, cold worked and artificially aged | Pick when maximum yield strength and dimensional stability are needed and low ductility is acceptable. | 570 | 660 | 2 | — |
What is 2124/SiC/25p T8?
2124/SiC/25p T8 is 2124/SiC/25p in the T8 temper — pick when maximum yield strength and dimensional stability are needed and low ductility is acceptable. 2124/SiC/25p T8 has a yield strength of 570 MPa (82.7 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 89% of composite grades. Elongation at break is 2% and the elastic modulus is 114 GPa (16.5 Msi). 2124/SiC/25p T8 has a density of 2.88 g/cm³ (0.104 lb/in³), heavier than 90% of composite grades. T6 is the default condition FabDigit quotes; T8 is available on request or by drawing note.
Advantages
- Conducts heat well — 145 W/m·K (83.8 BTU/hr·ft·°F), better than 91% of composite grades
- High strength — 570 MPa (82.7 ksi), better than 89% of composite grades
- Good UV / weathering resistance — 95/100, better than 78% of composite grades
Limitations
- Needs corrosion protection — 35/100, worse than 97% of composite grades
- Heavy — 2.88 g/cm³ (0.104 lb/in³), worse than 90% of composite grades
- Difficult to machine — 12/100, worse than 89% of composite grades
2124/SiC/25p T8 properties
Typical room-temperature values for 2124/SiC/25p T8; 14 are specific to this condition. Other listed values are 2124/SiC/25p reference data and may not represent this condition. Bars are the position among composite grades.
Physical1
2124/SiC/25p T8 has a density of 2.88 g/cm³ (0.104 lb/in³), heavier than 90% of composite grades.
Mechanical13
2124/SiC/25p T8 has a yield strength of 570 MPa (82.7 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 89% of composite grades. Elongation at break is 2% and the elastic modulus is 114 GPa (16.5 Msi).
Thermal6
2124/SiC/25p T8 is rated for continuous service to 175°C (347 °F). It conducts heat at 145 W/m·K (83.8 BTU/hr·ft·°F), better than 91% of composite grades. Thermal expansion is 15 µm/m·K (8.33 µin/in·°F).
Electrical1
2124/SiC/25p T8 has an electrical resistivity of 6.2×10⁻⁸ Ω·m.
Chemical & Environmental3
Corrosion resistance is fair (35/100), worse than 97% of composite grades. UV resistance is excellent.
Sustainability4
Producing a kilogram of 2124/SiC/25p T8 takes about 260 MJ of energy and emits 18 kg of CO₂ — more than 57% of composite grades. Typical recycled content is 0%.
Manufacturability2
2124/SiC/25p T8's machinability is not recommended (12/100, worse than 89% of composite grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 2124/SiC/25p T8
Is 2124/SiC/25p easy to machine?
Abrasive SiC demands PCD or CVD-diamond tooling, high speed/low feed and flood coolant; carbide edges wear in minutes and grinding/EDM are common finishing routes.
Can 2124/SiC/25p be welded?
Fusion welding is not recommended (SiC reacts with molten Al to form Al4C3); use friction stir welding, brazing, adhesive bonding or mechanical fasteners.
Can 2124/SiC/25p be formed, bent or molded?
Formed hot by extrusion, forging or hot rolling above ~400 °C at low strain rates; cold forming and tight-radius bending should be avoided due to low ductility.
What surface finishes work on 2124/SiC/25p?
Anodising works but gives a mottled grey finish with SiC pits; chromate/trivalent conversion coating, primer-paint or Ni plating are preferred for corrosion protection.
2124/SiC/25p 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 |
|---|---|---|
| SiC (reinforcement)25 vol% particulate, typically 3–15 µm; wt% converted from volume fraction | 26 – 29.5 | 27.8 |
| Cuof the 2124 matrix (wt% of matrix) | 3.8 – 4.9 | 4.4 |
| Mgof the 2124 matrix | 1.2 – 1.8 | 1.5 |
| Mnof the 2124 matrix | 0.3 – 0.9 | 0.6 |
| Feimpurity limit, 2124 is a low-Fe/Si version of 2024 | ≤ 0.3 | 0.15 |
| Siimpurity limit | ≤ 0.2 | 0.1 |
| Zn | ≤ 0.25 | — |
| Cr | ≤ 0.1 | — |
| Ti | ≤ 0.15 | — |
| Almatrix balance | balance | — |
2124/SiC/25p T8 — frequently asked
What is 2124/SiC/25p T8 used for?
2124/SiC/25p T8 is typically used for missile fins, avionics chassis, aerospace structural fittings and precision instrument housings. In short: highest-strength particulate Al MMC; high specific stiffness; diamond tooling required.
What is the yield strength of 2124/SiC/25p T8?
2124/SiC/25p T8 has a typical yield strength of 570 MPa (82.7 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 89% of composite grades. Strength varies by condition: see the 5 listed tempers.
Is 2124/SiC/25p T8 easy to machine?
Not especially — machinability is rated not recommended (12/100, worse than 89% of composite grades). Abrasive SiC demands PCD or CVD-diamond tooling, high speed/low feed and flood coolant; carbide edges wear in minutes and grinding/EDM are common finishing routes.
Can 2124/SiC/25p T8 be welded?
Fusion welding is not recommended (SiC reacts with molten Al to form Al4C3); use friction stir welding, brazing, adhesive bonding or mechanical fasteners.
What surface finishes work on 2124/SiC/25p T8?
Anodising works but gives a mottled grey finish with SiC pits; chromate/trivalent conversion coating, primer-paint or Ni plating are preferred for corrosion protection.
Can 2124/SiC/25p T8 be formed, bent or molded?
Formed hot by extrusion, forging or hot rolling above ~400 °C at low strain rates; cold forming and tight-radius bending should be avoided due to low ductility.
What is the maximum service temperature of 2124/SiC/25p T8?
2124/SiC/25p T8 is rated for continuous use to about 175°C (347 °F), and briefly to 300°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 2124/SiC/25p T6 and 2124/SiC/25p O?
T6 is the default condition — standard high-strength/high-stiffness condition for extruded or forged MMC structural parts. O: chosen only for maximum workability during secondary forming or for stress-free machining blanks. Yield strength is 480 MPa in T6 versus 180 MPa in O.
Sources
- ASM Handbook Vol. 21: Composites — Discontinuously Reinforced Aluminium — ASM International (2001)
- ANSI H35.5 / Aluminum Association designation system for metal-matrix composites — The Aluminum Association (1997)
- DWA Aluminum Composites — 2124/SiC/25p extruded and forged product data — DWA Aluminum Composites (USA) (2015)
- Metal Matrix Composites: Mechanical properties of SiCp/2000 series Al — Elsevier / Comprehensive Composite Materials (2018)
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.