Refractory Metal Cr99.90 vs FeCrSi
Refractory Metal · grade comparison
Refractory Metal Cr99.90 and FeCrSi are both refractory metal grades. Cr99.90 is the stronger of the two: tensile strength 300 MPa (43.5 ksi) against 120 MPa (17.4 ksi) for FeCrSi, about 150% more. FeCrSi is harder — 850 HV against 400 HV for Cr99.90 — which matters for wear surfaces and threads. FeCrSi is lighter (5.2 g/cm³ vs 7.19 g/cm³ for Cr99.90) and Cr99.90 is stiffer (279 GPa vs 150 GPa). On the shop floor, FeCrSi sits in a lower cost tier (budget, $) than Cr99.90 (high, $$$$).
Cr99.90Choose it when strength drives the design.
FeCrSiChoose it when surface hardness matters, or when weight is the constraint.
Cr99.90 vs FeCrSi: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all refractory metal 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 refractory metal 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
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Vickers
Reduction in Area
Shear Strength
Hardness, Rockwell C
Same in both: Elongation at Break 0% · Compressive Strength 900 MPa131 ksi
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)
Latent Heat of Fusion
Same in both: Max Service Temperature (continuous) 900°C1,652 °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
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Machinability Rating (AISI 1212 = 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)
Strength versus weight
Yield strength against density for every refractory metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Cr99.90 | FeCrSi |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $ Budget |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Cr99.90 vs FeCrSi — frequently asked
Is Cr99.90 stronger than FeCrSi?
Yes. Cr99.90 has a typical tensile strength of 300 MPa (43.5 ksi) against 120 MPa (17.4 ksi) for FeCrSi — about 150% more.
Which is cheaper, Cr99.90 or FeCrSi?
FeCrSi is the lower-cost material: it sits in the budget tier ($) while Cr99.90 is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, Cr99.90 or FeCrSi?
Cr99.90. Its weldability rates not recommended (8/100) against not recommended (0/100) for FeCrSi.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Cr99.90 and FeCrSi 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.