Stainless Steel AUS-8 Annealed vs AUS-8-CR
Stainless Steel · AUS-8 temper comparison
AUS-8 Annealed and AUS-8-CR are two conditions of the same stainless steel grade, AUS-8: Annealed versus CR (cold rolled). The chemistry is identical, so every difference below comes from the condition. AUS-8-CR is the stronger of the two: yield strength 650 MPa (94.3 ksi) against 450 MPa (65.3 ksi) for AUS-8 Annealed, about 44% more; tensile strength follows at 900 MPa (131 ksi) vs 760 MPa (110 ksi). In exchange, AUS-8 Annealed is the more ductile: elongation 18% versus 10% for AUS-8-CR, and AUS-8-CR is harder (270 HB vs 225 HB). AUS-8 Annealed runs hotter in service (400°C vs 350°C continuous).
AUS-8 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
AUS-8-CRChoose it when strength drives the design.
AUS-8 Annealed vs AUS-8-CR: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all stainless steel 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 stainless steel 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
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 78 GPa11.3 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.75 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,480°C2,696 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 24 W/m·K13.9 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.4 µm/m·K5.8 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3 % IACS · Electrical Resistivity 5.5×10⁻⁷ Ω·m21.7 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.35 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 45 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 53 MJ/kg22,786 BTU/lb · Embodied Carbon (primary production) 5 kg CO₂/kg · Embodied Water 130 L/kg15.6 gal/lb · Typical Recycled Content 35%
Strength versus weight
Yield strength against density for every stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
AUS-8 Annealed vs AUS-8-CR — frequently asked
Is AUS-8-CR stronger than AUS-8 Annealed?
Yes. AUS-8-CR has a typical yield strength of 650 MPa (94.3 ksi) against 450 MPa (65.3 ksi) for AUS-8 Annealed — about 44% more. Tensile strength is 900 MPa (131 ksi) vs 760 MPa (110 ksi).
Which condition does FabDigit quote by default, Annealed or CR?
Annealed is the default AUS-8 condition in the FabDigit quote flow. 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, AUS-8 Annealed or AUS-8-CR?
AUS-8 Annealed. Its machinability rates fair (40/100) against poor (34/100) for AUS-8-CR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AUS-8 Annealed and AUS-8-CR 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.