Refractory Metal I-70-H vs S-200F
Refractory Metal · grade comparison
Refractory Metal I-70-H and S-200F are both refractory metal grades. S-200F is the stronger of the two: yield strength 262 MPa (38 ksi) against 205 MPa (29.7 ksi) for I-70-H, about 28% more; tensile strength follows at 370 MPa (53.7 ksi) vs 310 MPa (45 ksi). In exchange, I-70-H is the more ductile: elongation 4.5% versus 3% for S-200F, and S-200F is harder (150 HB vs 120 HB).
I-70-HChoose it when the part is bent, formed or impact-loaded.
S-200FChoose it when strength drives the design.
I-70-H vs S-200F: 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.
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 B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 303 GPa43.9 Msi · Bulk Modulus 116 GPa16.8 Msi · Poisson's Ratio 0.08
Physical
Density and transition temperatures.
Liquidus Temperature
Same in both: Density 1.85 g/cm³0.07 lb/in³ · Melting Point (Solidus) 1,287°C2,349 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Latent Heat of Fusion
Min Service Temperature
Same in both: Specific Heat Capacity 1,925 J/kg·K0.46 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.3 µm/m·K6.3 µin/in·°F · Max Service Temperature (continuous) 500°C932 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 45 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Castability
Polishability
Same in both: Machinability 35 / 100 · Weldability 20 / 100 · Brazeability / Solderability 55 / 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)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 163.8 MN·m/kg
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 | I-70-H | S-200F |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
I-70-H vs S-200F — frequently asked
Is S-200F stronger than I-70-H?
Yes. S-200F has a typical yield strength of 262 MPa (38 ksi) against 205 MPa (29.7 ksi) for I-70-H — about 28% more. Tensile strength is 370 MPa (53.7 ksi) vs 310 MPa (45 ksi).
Which is cheaper, I-70-H or S-200F?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose I-70-H over S-200F?
Pick I-70-H when the part is bent, formed or impact-loaded. Pick S-200F when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in I-70-H and S-200F 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.