Steel 18Ni(200) Maraging Steel vs 37CrNi3A
Steel · grade comparison
Steel 18Ni(200) Maraging Steel and 37CrNi3A are both steel grades. 18Ni(200) Maraging Steel is the stronger of the two: yield strength 1,400 MPa (203 ksi) against 1,030 MPa (149 ksi) for 37CrNi3A, about 36% more; tensile strength follows at 1,450 MPa (210 ksi) vs 1,180 MPa (171 ksi). 18Ni(200) Maraging Steel is harder — 400 HB against 350 HB for 37CrNi3A — which matters for wear surfaces and threads. 37CrNi3A is stiffer (210 GPa vs 186 GPa) and 37CrNi3A conducts heat better (35 W/m·K vs 20.5 W/m·K). On the shop floor, 37CrNi3A machines more easily (fair vs poor), 18Ni(200) Maraging Steel welds better (very good vs poor), and 37CrNi3A forms better (25 vs 15 out of 100).
18Ni(200) Maraging SteelChoose it when strength drives the design, or when surface hardness matters.
37CrNi3AChoose it when the part is machined in volume, or when cost is the deciding factor.
18Ni(200) Maraging Steel vs 37CrNi3A: 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 Steel37CrNi3A
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
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)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Charpy V-Notch Impact (RT) 60 J44.3 ft·lbf
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Min Service Temperature
Same in both: Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 400°C752 °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
Formability (cold)
Castability
Brazeability / Solderability
Polishability
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 | 37CrNi3A |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$ Standard |
| 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 37CrNi3A — frequently asked
Is 18Ni(200) Maraging Steel stronger than 37CrNi3A?
Yes. 18Ni(200) Maraging Steel has a typical yield strength of 1,400 MPa (203 ksi) against 1,030 MPa (149 ksi) for 37CrNi3A — about 36% more. Tensile strength is 1,450 MPa (210 ksi) vs 1,180 MPa (171 ksi).
Which is cheaper, 18Ni(200) Maraging Steel or 37CrNi3A?
37CrNi3A is the lower-cost material: it sits in the standard tier ($$) while 18Ni(200) Maraging Steel is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, 18Ni(200) Maraging Steel or 37CrNi3A?
37CrNi3A. Its machinability rates fair (40/100) against poor (30/100) for 18Ni(200) Maraging Steel; for welding the order is 18Ni(200) Maraging Steel first (very good, 70/100) then 37CrNi3A (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 18Ni(200) Maraging Steel and 37CrNi3A 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.