Refractory Metal R04210 vs R04251
Refractory Metal · grade comparison
Refractory Metal R04210 and R04251 are both refractory metal grades. R04251 is the stronger of the two: yield strength 140 MPa (20.3 ksi) against 115 MPa (16.7 ksi) for R04210, about 22% more; tensile strength follows at 250 MPa (36.3 ksi) vs 200 MPa (29 ksi). In exchange, R04210 is the more ductile: elongation 40% versus 30% for R04251, and R04251 is harder (100 HV vs 75 HV). R04210 conducts heat better (53.7 W/m·K vs 45 W/m·K). On the shop floor, R04251 welds better (80 vs 70 out of 100).
R04210Choose it when the part is bent, formed or impact-loaded.
R04251Choose it when strength drives the design, or when it will be welded.
R04210 vs R04251: 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
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Bulk Modulus 170 GPa24.7 Msi
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
Min Service Temperature
Same in both: 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.
Weldability
Formability (cold)
Brazeability / Solderability
Same in both: Machinability 28 / 100 · Machinability Rating (AISI 1212 = 100 %) 25% · Castability 20 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 600 L/kg71.9 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 refractory metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | R04210 | R04251 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
R04210 vs R04251 — frequently asked
Is R04251 stronger than R04210?
Yes. R04251 has a typical yield strength of 140 MPa (20.3 ksi) against 115 MPa (16.7 ksi) for R04210 — about 22% more. Tensile strength is 250 MPa (36.3 ksi) vs 200 MPa (29 ksi).
Which is cheaper, R04210 or R04251?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, R04210 or R04251?
R04251. Its weldability rates very good (80/100) against very good (70/100) for R04210.
Ready to make it?
Upload a CAD file and FabDigit prices the part in R04210 and R04251 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.