Steel G17NiCrMo13-6 +A vs G17NiCrMo13-6 +AC
Steel · G17NiCrMo13-6 temper comparison
G17NiCrMo13-6 +A and G17NiCrMo13-6 +AC are two conditions of the same steel grade, G17NiCrMo13-6: +A (annealed) versus +AC (spheroidize annealed). The chemistry is identical, so every difference below comes from the condition. G17NiCrMo13-6 +AC is the stronger of the two: yield strength 460 MPa (66.7 ksi) against 430 MPa (62.4 ksi) for G17NiCrMo13-6 +A, about 7% more; tensile strength follows at 700 MPa (102 ksi) vs 660 MPa (95.7 ksi). In exchange, G17NiCrMo13-6 +A is the more ductile: elongation 20% versus 10% for G17NiCrMo13-6 +AC, and G17NiCrMo13-6 +AC is harder (230 HB vs 195 HB). G17NiCrMo13-6 +A runs hotter in service (400°C vs 350°C continuous). On the shop floor, G17NiCrMo13-6 +A machines more easily (52 vs 38 out of 100) and G17NiCrMo13-6 +A welds better (fair vs poor).
G17NiCrMo13-6 +AChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
G17NiCrMo13-6 +ACChoose it when strength drives the design.
G17NiCrMo13-6 +A vs G17NiCrMo13-6 +AC: 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.
G17NiCrMo13-6 +AG17NiCrMo13-6 +AC
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 C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 163 GPa23.6 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) 1,420°C2,588 °F · Liquidus Temperature 1,500°C2,732 °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 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.8 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -60°C-76 °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) -0.6 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 65 / 100 · Brazeability / Solderability 50 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 30 MJ/kg12,898 BTU/lb · Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 75%
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.
G17NiCrMo13-6 +A vs G17NiCrMo13-6 +AC — frequently asked
Is G17NiCrMo13-6 +AC stronger than G17NiCrMo13-6 +A?
Yes. G17NiCrMo13-6 +AC has a typical yield strength of 460 MPa (66.7 ksi) against 430 MPa (62.4 ksi) for G17NiCrMo13-6 +A — about 7% more. Tensile strength is 700 MPa (102 ksi) vs 660 MPa (95.7 ksi).
Which condition does FabDigit quote by default, +A or +AC?
+QT is the default G17NiCrMo13-6 condition in the FabDigit quote flow (neither +A nor +AC). 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, G17NiCrMo13-6 +A or G17NiCrMo13-6 +AC?
G17NiCrMo13-6 +A, by a small margin. Both rate fair for machinability — 52/100 against 38/100 for G17NiCrMo13-6 +AC; for welding the order is G17NiCrMo13-6 +A first (fair, 48/100) then G17NiCrMo13-6 +AC (poor, 32/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in G17NiCrMo13-6 +A and G17NiCrMo13-6 +AC 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.