Steel Maraging 300 Aged vs Maraging 300 Annealed
Steel · Maraging 300 temper comparison
Maraging 300 Aged and Maraging 300 Annealed are two conditions of the same steel grade, Maraging 300: Aged (precipitation aged 480–500 °C / 3–6 h, air cooled) versus Annealed. The chemistry is identical, so every difference below comes from the condition. Maraging 300 Aged is the stronger of the two: yield strength 1,900 MPa (276 ksi) against 800 MPa (116 ksi) for Maraging 300 Annealed, about 138% more; tensile strength follows at 1,950 MPa (283 ksi) vs 1,010 MPa (146 ksi). In exchange, Maraging 300 Annealed is the more ductile: elongation 17% versus 7% for Maraging 300 Aged, and Maraging 300 Aged is harder (52 HRC vs 30 HRC). Maraging 300 Aged is stiffer (190 GPa vs 180 GPa). On the shop floor, Maraging 300 Annealed machines more easily (fair vs poor) and Maraging 300 Annealed welds better (very good vs good).
Maraging 300 AgedChoose it when strength drives the design.
Maraging 300 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
Maraging 300 Aged vs Maraging 300 Annealed: 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.
Maraging 300 AgedMaraging 300 Annealed
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)
Charpy V-Notch Impact (RT)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 70 GPa10.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.3 · Hardness, Brinell 300 HB
Physical
Density and transition temperatures.
Same in both: Density 8 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,413°C2,575 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Same in both: Thermal Conductivity 20 W/m·K11.6 BTU/hr·ft·°F · Specific Heat Capacity 450 J/kg·K0.11 BTU/lb·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.9 % IACS · Electrical Resistivity 6×10⁻⁷ Ω·m23.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.58 V · Corrosion Resistance 25 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Castability 40 / 100 · Brazeability / Solderability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 100 MJ/kg42,992 BTU/lb · Embodied Carbon (primary production) 6.5 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 20%
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.
Maraging 300 Aged vs Maraging 300 Annealed — frequently asked
Is Maraging 300 Aged stronger than Maraging 300 Annealed?
Yes. Maraging 300 Aged has a typical yield strength of 1,900 MPa (276 ksi) against 800 MPa (116 ksi) for Maraging 300 Annealed — about 138% more. Tensile strength is 1,950 MPa (283 ksi) vs 1,010 MPa (146 ksi).
Which condition does FabDigit quote by default, Aged or Annealed?
Annealed is the default Maraging 300 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, Maraging 300 Aged or Maraging 300 Annealed?
Maraging 300 Annealed. Its machinability rates fair (45/100) against poor (25/100) for Maraging 300 Aged; for welding the order is Maraging 300 Annealed first (very good, 80/100) then Maraging 300 Aged (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Maraging 300 Aged and Maraging 300 Annealed 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.