Steel Alloy 49-ANN vs Alloy 49-H
Steel · Alloy 49 temper comparison
Alloy 49-ANN and Alloy 49-H are two conditions of the same steel grade, Alloy 49: ANN (annealed) versus H (hardened). The chemistry is identical, so every difference below comes from the condition. Alloy 49-H is the stronger of the two: yield strength 850 MPa (123 ksi) against 220 MPa (31.9 ksi) for Alloy 49-ANN, about 3.9 times as much; tensile strength follows at 950 MPa (138 ksi) vs 530 MPa (76.9 ksi). In exchange, Alloy 49-ANN is the more ductile: elongation 38% versus 3% for Alloy 49-H, and Alloy 49-H is harder (250 HB vs 120 HB). Alloy 49-ANN runs hotter in service (480°C vs 300°C continuous). On the shop floor, Alloy 49-H machines more easily (45 vs 35 out of 100) and Alloy 49-ANN welds better (very good vs good).
Alloy 49-ANNChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Alloy 49-HChoose it when strength drives the design, or when the part is machined in volume.
Alloy 49-ANN vs Alloy 49-H: 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.
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
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Shear Modulus 58 GPa8.4 Msi · Bulk Modulus 155 GPa22.5 Msi · Poisson's Ratio 0.3 · Shear Strength 350 MPa50.8 ksi · Charpy V-Notch Impact (RT) 100 J73.8 ft·lbf · Hardness, Rockwell B 70 HRB
Physical
Density and transition temperatures.
Same in both: Density 8.25 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 13.5 W/m·K7.8 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9.5 µm/m·K5.3 µin/in·°F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.6 % IACS · Electrical Resistivity 4.8×10⁻⁷ Ω·m18.9 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.35 V · Corrosion Resistance 32 / 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 40 / 100 · Brazeability / Solderability 70 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 120 MJ/kg51,591 BTU/lb · Embodied Carbon (primary production) 8.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 30%
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.
Alloy 49-ANN vs Alloy 49-H — frequently asked
Is Alloy 49-H stronger than Alloy 49-ANN?
Yes. Alloy 49-H has a typical yield strength of 850 MPa (123 ksi) against 220 MPa (31.9 ksi) for Alloy 49-ANN — about 3.9 times as much. Tensile strength is 950 MPa (138 ksi) vs 530 MPa (76.9 ksi).
Which condition does FabDigit quote by default, ANN or H?
ANN is the default Alloy 49 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, Alloy 49-ANN or Alloy 49-H?
Alloy 49-H, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for Alloy 49-ANN; for welding the order is Alloy 49-ANN first (very good, 70/100) then Alloy 49-H (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 49-ANN and Alloy 49-H 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.