Aluminum A7075-RAM10-SR vs A7075-RAM10-T73
Aluminum · A7075-RAM10 temper comparison
A7075-RAM10-SR and A7075-RAM10-T73 are two conditions of the same aluminum grade, A7075-RAM10: SR (stress relieved) versus T73 (solution heat treated and overaged for stress-corrosion resistance). The chemistry is identical, so every difference below comes from the condition. A7075-RAM10-T73 is the stronger of the two: yield strength 400 MPa (58 ksi) against 215 MPa (31.2 ksi) for A7075-RAM10-SR, about 86% more; tensile strength follows at 465 MPa (67.4 ksi) vs 300 MPa (43.5 ksi). In exchange, A7075-RAM10-SR is the more ductile: elongation 11% versus 8% for A7075-RAM10-T73, and A7075-RAM10-T73 is harder (138 HB vs 90 HB). A7075-RAM10-T73 runs hotter in service (175°C vs 120°C continuous).
A7075-RAM10-SRChoose it when the part is bent, formed or impact-loaded.
A7075-RAM10-T73Choose it when strength drives the design, or when the part sees heat.
A7075-RAM10-SR vs A7075-RAM10-T73: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all aluminum grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all aluminum grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 29 GPa4.2 Msi · Bulk Modulus 76 GPa11 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.9 g/cm³0.1 lb/in³ · Melting Point (Solidus) 477°C891 °F · Liquidus Temperature 635°C1,175 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 920 J/kg·K0.22 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 22 µm/m·K12.2 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.83 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 25 / 100 · Brazeability / Solderability 15 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 260 MJ/kg111,780 BTU/lb · Embodied Carbon (primary production) 18 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 5%
Strength versus weight
Yield strength against density for every aluminum grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
A7075-RAM10-SR vs A7075-RAM10-T73 — frequently asked
Is A7075-RAM10-T73 stronger than A7075-RAM10-SR?
Yes. A7075-RAM10-T73 has a typical yield strength of 400 MPa (58 ksi) against 215 MPa (31.2 ksi) for A7075-RAM10-SR — about 86% more. Tensile strength is 465 MPa (67.4 ksi) vs 300 MPa (43.5 ksi).
Which condition does FabDigit quote by default, SR or T73?
T6 is the default A7075-RAM10 condition in the FabDigit quote flow (neither SR nor T73). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, A7075-RAM10-SR or A7075-RAM10-T73?
A7075-RAM10-SR. Its machinability rates good (55/100) against fair (48/100) for A7075-RAM10-T73; for welding the order is A7075-RAM10-SR first (fair, 50/100) then A7075-RAM10-T73 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A7075-RAM10-SR and A7075-RAM10-T73 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.