Aluminum A7075-RAM10-T73
Temper
JIS A7075-RAM10
T73 = solution heat treated and overaged for stress-corrosion resistance
Choose when stress-corrosion cracking or exfoliation resistance is required and ~10 % strength loss is acceptable.
Values for the T73 condition
Other A7075-RAM10 tempers and conditions
A7075-RAM10 is listed in 5 conditions; see the grade overview at A7075-RAM10.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Pick when distortion control and machinability matter more than strength, or before a full solution treatment. | 215 | 300 | 11 | 90 HB | 38 % IACS |
As built (as printed) | Use for dimensional/geometry trials or when parts will be heat treated later; strength is well below T6. | 280 | 370 | 8 | 108 HB | 24 % IACS |
T73This page Solution heat treated and overaged for stress-corrosion resistance | Choose when stress-corrosion cracking or exfoliation resistance is required and ~10 % strength loss is acceptable. | 400 | 465 | 8 | 138 HB | 40 % IACS |
T6Default Solution heat treated and artificially aged | Default condition: maximum strength and hardness, closest match to wrought 7075-T6 for structural AM parts. | 480 | 530 | 6 | 155 HB | 30 % IACS |
hot isostatic pressed then solution treated and aged | Specify for fatigue-critical or flight-hardware parts where residual porosity must be closed and scatter reduced. | 485 | 540 | 9 | 155 HB | — |
What is A7075-RAM10-T73?
A7075-RAM10-T73 is A7075-RAM10 in the T73 temper — choose when stress-corrosion cracking or exfoliation resistance is required and ~10 % strength loss is acceptable. A7075-RAM10-T73 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 465 MPa (67.4 ksi) — stronger than 88% of aluminum grades. Elongation at break is 8% and the elastic modulus is 78 GPa (11.3 Msi). A7075-RAM10-T73 has a density of 2.9 g/cm³ (0.105 lb/in³), heavier than 98% of aluminum grades. It melts at 477°C (891 °F). T6 is the default condition FabDigit quotes; T73 is available on request or by drawing note.
Advantages
- High strength — 400 MPa (58 ksi), better than 88% of aluminum grades
- High service temperature — 175°C (347 °F), better than 83% of aluminum grades
Limitations
- High embodied carbon — 18 kg CO₂/kg, worse than 99% of aluminum grades
A7075-RAM10-T73 properties
Typical room-temperature values for A7075-RAM10-T73; 14 are specific to this condition. Other listed values are A7075-RAM10 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
A7075-RAM10-T73 has a density of 2.9 g/cm³ (0.105 lb/in³), heavier than 98% of aluminum grades. It melts at 477°C (891 °F).
Mechanical14
A7075-RAM10-T73 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 465 MPa (67.4 ksi) — stronger than 88% of aluminum grades. Elongation at break is 8% and the elastic modulus is 78 GPa (11.3 Msi).
Thermal6
A7075-RAM10-T73 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 53% of aluminum grades. Thermal expansion is 22 µm/m·K (12.2 µin/in·°F).
Electrical3
A7075-RAM10-T73 conducts electricity at 40 % IACS, better than 72% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 56% of aluminum grades.
Sustainability4
Producing a kilogram of A7075-RAM10-T73 takes about 260 MJ of energy and emits 18 kg of CO₂ — more than 99% of aluminum grades. Typical recycled content is 5%.
Manufacturability8
A7075-RAM10-T73's machinability is fair (48/100, worse than 68% of aluminum grades); weldability fair (45/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with A7075-RAM10-T73
Is A7075-RAM10 easy to machine?
Machine in T6 with sharp polycrystalline-diamond or coated-carbide tooling and flood coolant — the in-situ ceramic particles are abrasive and cut tool life well below plain 7075.
Can A7075-RAM10 be welded?
The ceramic nucleant largely suppresses the solidification cracking that makes plain 7075 unweldable, so LPBF and 4000/5000 series-filler fusion repair are feasible; still expect strength loss in the HAZ and re-heat-treat after welding.
Can A7075-RAM10 be formed, bent or molded?
Not a wrought product — parts are built near-net by LPBF (preheated plate, stress relief on the plate before removal); post-print cold forming is not practical at these strength levels.
What surface finishes work on A7075-RAM10?
Support removal, blasting and shot peening are routine; sulfuric or hard anodize gives protection but a mottled, dark appearance, and chromate-free primer/paint is the usual choice for corrosion-critical service.
A7075-RAM10 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 |
|---|---|---|
| Znmatrix alloy per AA 7075 | 5.1 – 6.1 | 5.6 |
| Mg | 2.1 – 2.9 | 2.5 |
| Cu | 1.2 – 2 | 1.6 |
| Cr | 0.18 – 0.28 | 0.23 |
| Feimpurity max | ≤ 0.5 | 0.2 |
| Siimpurity max | ≤ 0.4 | 0.15 |
| Mnimpurity max | ≤ 0.3 | 0.05 |
| Timatrix Ti; additional Ti is bound in the ceramic reinforcement | ≤ 0.2 | 0.05 |
| ceramic reinforcement (in-situ TiB₂ / Alnominal vol % formed in situ by the RAM reactive additive; acts as grain nucleant/hot-crack suppressor | 8 – 12 | 10 |
| Al | balance | — |
A7075-RAM10-T73 — frequently asked
What is A7075-RAM10-T73 used for?
A7075-RAM10-T73 is typically used for aerospace fittings, high-strength AM tooling and structural aerospace brackets. In short: highest-strength LPBF aluminum; printable 7075 chemistry; needs coating in chlorides.
What is the yield strength of A7075-RAM10-T73?
A7075-RAM10-T73 has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 465 MPa (67.4 ksi) — stronger than 88% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is A7075-RAM10-T73 easy to machine?
Reasonably — machinability is rated fair (48/100, worse than 68% of aluminum grades). Machine in T6 with sharp polycrystalline-diamond or coated-carbide tooling and flood coolant — the in-situ ceramic particles are abrasive and cut tool life well below plain 7075.
Can A7075-RAM10-T73 be welded?
With care — weldability is rated fair (45/100). The ceramic nucleant largely suppresses the solidification cracking that makes plain 7075 unweldable, so LPBF and 4000/5000 series-filler fusion repair are feasible; still expect strength loss in the HAZ and re-heat-treat after welding.
What surface finishes work on A7075-RAM10-T73?
Support removal, blasting and shot peening are routine; sulfuric or hard anodize gives protection but a mottled, dark appearance, and chromate-free primer/paint is the usual choice for corrosion-critical service.
Can A7075-RAM10-T73 be formed, bent or molded?
Not a wrought product — parts are built near-net by LPBF (preheated plate, stress relief on the plate before removal); post-print cold forming is not practical at these strength levels.
What is the maximum service temperature of A7075-RAM10-T73?
A7075-RAM10-T73 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 A7075-RAM10-T6 and A7075-RAM10-SR?
T6 is the default condition — default condition: maximum strength and hardness, closest match to wrought 7075-T6 for structural AM parts. SR: pick when distortion control and machinability matter more than strength, or before a full solution treatment. Yield strength is 480 MPa in T6 versus 215 MPa in SR.
Sources
- A7075-RAM10 aluminum LPBF powder technical data — Elementum 3D (2023)
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- MMPDS typical property data for 7075 products — Battelle/FAA (2023)
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.