Steel 18Ni(200) Maraging Steel vs Marval 18
Steel · grade comparison
Steel 18Ni(200) Maraging Steel and Marval 18 are both steel grades. Marval 18 is the stronger of the two: yield strength 1,900 MPa (276 ksi) against 1,400 MPa (203 ksi) for 18Ni(200) Maraging Steel, about 36% more; tensile strength follows at 1,980 MPa (287 ksi) vs 1,450 MPa (210 ksi). In exchange, 18Ni(200) Maraging Steel is the more ductile: elongation 12% versus 10% for Marval 18, and Marval 18 is harder (540 HB vs 400 HB). 18Ni(200) Maraging Steel conducts electricity better (3.8 % IACS vs 3.1 % IACS). On the shop floor, Marval 18 welds better (80 vs 70 out of 100).
18Ni(200) Maraging SteelChoose it when the part is bent, formed or impact-loaded.
Marval 18Choose it when strength drives the design, or when it will be welded.
18Ni(200) Maraging Steel vs Marval 18: 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 SteelMarval 18
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear 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: Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.3
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 Conductivity
Specific Heat Capacity
Latent Heat of Fusion
Same in both: Thermal Expansion (CTE, 20–100 °C) 10.1 µm/m·K5.6 µin/in·°F · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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
Castability
Brazeability / Solderability
Same in both: Formability (cold) 15 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 200 L/kg24 gal/lb
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 | Marval 18 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 9 finishes: Copper Plating, Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Manganese Phosphate, Plasma Spray, Silver Plating, Zinc Phosphate.
18Ni(200) Maraging Steel vs Marval 18 — frequently asked
Is Marval 18 stronger than 18Ni(200) Maraging Steel?
Yes. Marval 18 has a typical yield strength of 1,900 MPa (276 ksi) against 1,400 MPa (203 ksi) for 18Ni(200) Maraging Steel — about 36% more. Tensile strength is 1,980 MPa (287 ksi) vs 1,450 MPa (210 ksi).
Which is cheaper, 18Ni(200) Maraging Steel or Marval 18?
Both sit in the same relative cost tier ($$$$, 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 Marval 18?
18Ni(200) Maraging Steel, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for Marval 18; for welding the order is Marval 18 first (very good, 80/100) then 18Ni(200) Maraging Steel (very good, 70/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 18Ni(200) Maraging Steel and Marval 18 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.