Steel A27 Grade 60-30-A vs A27 Grade 60-30 U-60-30
Steel · A27 Grade 60-30 temper comparison
A27 Grade 60-30-A and A27 Grade 60-30 U-60-30 are two conditions of the same steel grade, A27 Grade 60-30: A (solution annealed) versus U-60-30 (as-cast). The chemistry is identical, so every difference below comes from the condition. Both yield at about 240 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (solution annealed versus as-cast). A27 Grade 60-30-A is the more ductile: elongation 31% versus 25% for A27 Grade 60-30 U-60-30. On the shop floor, A27 Grade 60-30-A machines more easily (good vs fair).
A27 Grade 60-30-AChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
A27 Grade 60-30-A vs A27 Grade 60-30 U-60-30: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all 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 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.
A27 Grade 60-30-AA27 Grade 60-30 U-60-30
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
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: 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 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,510°C2,750 °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 480 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.9 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 10 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 10 / 100
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 75 / 100 · Brazeability / Solderability 70 / 100 · Polishability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 22 MJ/kg9,458 BTU/lb · Embodied Carbon (primary production) 1.9 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 90%
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
A27 Grade 60-30-A vs A27 Grade 60-30 U-60-30 — frequently asked
What is the difference between A27 Grade 60-30-A and A27 Grade 60-30 U-60-30?
A27 Grade 60-30-A and A27 Grade 60-30 U-60-30 are two conditions of the same steel grade, A27 Grade 60-30: A (solution annealed) versus U-60-30 (as-cast). The chemistry is identical, so every difference below comes from the condition. Both yield at about 240 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (solution annealed versus as-cast).
Which condition does FabDigit quote by default, A or U-60-30?
N is the default A27 Grade 60-30 condition in the FabDigit quote flow (neither A nor U-60-30). 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, A27 Grade 60-30-A or A27 Grade 60-30 U-60-30?
A27 Grade 60-30-A. Its machinability rates good (62/100) against fair (52/100) for A27 Grade 60-30 U-60-30; for welding the order is A27 Grade 60-30-A first (excellent, 88/100) then A27 Grade 60-30 U-60-30 (very good, 82/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A27 Grade 60-30-A and A27 Grade 60-30 U-60-30 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.