Aluminum A6061-RAM2-AB vs A6061-RAM2-SR
Aluminum · A6061-RAM2 temper comparison
A6061-RAM2-AB and A6061-RAM2-SR are two conditions of the same aluminum grade, A6061-RAM2: AB (as built (as printed)) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. A6061-RAM2-AB is the stronger of the two: yield strength 230 MPa (33.4 ksi) against 165 MPa (23.9 ksi) for A6061-RAM2-SR, about 39% more; tensile strength follows at 300 MPa (43.5 ksi) vs 240 MPa (34.8 ksi). In exchange, A6061-RAM2-SR is the more ductile: elongation 12% versus 6% for A6061-RAM2-AB, and A6061-RAM2-AB is harder (82 HB vs 65 HB). A6061-RAM2-SR runs hotter in service (200°C vs 120°C continuous) and A6061-RAM2-SR conducts heat better (165 W/m·K vs 130 W/m·K). On the shop floor, A6061-RAM2-AB machines more easily (very good vs good).
A6061-RAM2-ABChoose it when strength drives the design, or when the part is machined in volume.
A6061-RAM2-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
A6061-RAM2-AB vs A6061-RAM2-SR: 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 73 GPa10.6 Msi · Shear Modulus 26 GPa3.8 Msi · Bulk Modulus 69 GPa10 Msi · Poisson's Ratio 0.33 · Compressive Strength 335 MPa48.6 ksi · Shear Strength 220 MPa31.9 ksi · Fracture Toughness (K_IC) 27 MPa·√m24.6 ksi·√in · Hardness, Rockwell B 60 HRB
Physical
Density and transition temperatures.
Same in both: Density 2.71 g/cm³0.1 lb/in³ · Melting Point (Solidus) 582°C1,080 °F · Liquidus Temperature 652°C1,206 °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 896 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.2 µm/m·K12.9 µin/in·°F · Latent Heat of Fusion 400 J/g172 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 4.3×10⁻⁸ Ω·m1.69 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.78 V · Corrosion Resistance 60 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 130% · Weldability 65 / 100 · Formability (cold) 30 / 100 · Brazeability / Solderability 45 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 250 MJ/kg107,481 BTU/lb · Embodied Carbon (primary production) 16 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 10%
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.
A6061-RAM2-AB vs A6061-RAM2-SR — frequently asked
Is A6061-RAM2-AB stronger than A6061-RAM2-SR?
Yes. A6061-RAM2-AB has a typical yield strength of 230 MPa (33.4 ksi) against 165 MPa (23.9 ksi) for A6061-RAM2-SR — about 39% more. Tensile strength is 300 MPa (43.5 ksi) vs 240 MPa (34.8 ksi).
Which condition does FabDigit quote by default, AB or SR?
T6 is the default A6061-RAM2 condition in the FabDigit quote flow (neither AB nor SR). 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, A6061-RAM2-AB or A6061-RAM2-SR?
A6061-RAM2-AB. Its machinability rates very good (70/100) against good (60/100) for A6061-RAM2-SR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A6061-RAM2-AB and A6061-RAM2-SR 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.