Steel 18Ni(200) Maraging Steel vs 18Ni(350) Maraging Steel
Steel · grade comparison
Steel 18Ni(200) Maraging Steel and 18Ni(350) Maraging Steel are both steel grades. 18Ni(350) Maraging Steel is the stronger of the two: yield strength 2,320 MPa (336 ksi) against 1,400 MPa (203 ksi) for 18Ni(200) Maraging Steel, about 66% more; tensile strength follows at 2,400 MPa (348 ksi) vs 1,450 MPa (210 ksi). In exchange, 18Ni(200) Maraging Steel is the more ductile: elongation 12% versus 7% for 18Ni(350) Maraging Steel, and 18Ni(350) Maraging Steel is harder (56 HRC vs 43 HRC). On the shop floor, 18Ni(200) Maraging Steel welds better (very good vs good).
18Ni(200) Maraging SteelChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
18Ni(350) Maraging SteelChoose it when strength drives the design.
18Ni(200) Maraging Steel vs 18Ni(350) Maraging Steel: 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.
18Ni(200) Maraging Steel18Ni(350) Maraging Steel
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 C
Hardness, Vickers
Same in both: Shear Modulus 71 GPa10.3 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Density
Liquidus Temperature
Same in both: Melting Point (Solidus) 1,413°C2,575 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Min Service Temperature
Same in both: Thermal Expansion (CTE, 20–100 °C) 10.1 µm/m·K5.6 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 400°C752 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.8 % IACS · Electrical Resistivity 4.5×10⁻⁷ Ω·m17.7 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Same in both: Castability 45 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | 18Ni(200) Maraging Steel | 18Ni(350) Maraging Steel |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 9 finishes: Copper Plating, Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Manganese Phosphate, Plasma Spray, Silver Plating, Zinc Phosphate.
18Ni(200) Maraging Steel vs 18Ni(350) Maraging Steel — frequently asked
Is 18Ni(350) Maraging Steel stronger than 18Ni(200) Maraging Steel?
Yes. 18Ni(350) Maraging Steel has a typical yield strength of 2,320 MPa (336 ksi) against 1,400 MPa (203 ksi) for 18Ni(200) Maraging Steel — about 66% more. Tensile strength is 2,400 MPa (348 ksi) vs 1,450 MPa (210 ksi).
Which is cheaper, 18Ni(200) Maraging Steel or 18Ni(350) Maraging Steel?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, 18Ni(200) Maraging Steel or 18Ni(350) Maraging Steel?
18Ni(200) Maraging Steel, by a small margin. Both rate poor for machinability — 30/100 against 22/100 for 18Ni(350) Maraging Steel; for welding the order is 18Ni(200) Maraging Steel first (very good, 70/100) then 18Ni(350) Maraging Steel (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 18Ni(200) Maraging Steel and 18Ni(350) Maraging Steel 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.