Aerospace Refractory · Niobium
Refractory Metal C-103
Refractory Metal C-103 is an aerospace refractory refractory metal — aerospace high-temp niobium. Typical values: 290 MPa yield, 8.85 g/cm³, rated to 2,000 °C. Available for CNC machining, Sheet metal at FabDigit.
Properties
Typical room-temperature values in the Vacuum Annealed condition. Metric first, imperial in gray. The bars show where C-103 sits against the other 8 refractory metal grades in the catalog.
Datasheet
| Yield strength | 290 MPa42 ksi |
|---|---|
| Tensile strength | 460 MPa67 ksi |
| Hardness | 180 HV≈ 171 HB |
| Density | 8.85 g/cm³0.32 lb/in³ |
| Specific strength (yield ÷ density) | 33 |
| Min service temp | -200 °C-328 °F |
| Max service temp | 2,000 °C3,632 °F |
| Electrical conductivity | 11 % IACS6.4 MS/m |
| Machinability | Fair40 / 100 |
| Weldability | Good60 / 100 |
| Formability | Very good75 / 100 |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other refractory metal grades
Strength versus weight in the refractory metal family
Yield strength against density for every refractory metal grade FabDigit runs. C-103 is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to C-103. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Fair40 / 100 |
|---|---|
| Cutting speed (rough / finish) | — / — |
| Minimum wall | — |
| Minimum internal radius | — |
| Drill depth limit | — |
| Best surface (machined / polished) | Ra — / — |
| Hardenable after machining | — |
Sheet metal
| Formability | Better75 / 100 |
|---|---|
| Weldability | Good60 / 100 |
Conditions and tempers
How C-103 is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Vacuum AnnealedDefault Heat Treat State | Contamination-free Ti/Zr — implants, aerospace hardware | — | — | — | — |
Stress Relieved Heat Treat State | Holds tight flatness/tolerance through heavy machining | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on C-103, ranked by how often they make sense for this grade.
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Edge Break (0.5mm) | Deburr |
| CMM Inspection | Inspection |
| FAI Report | Inspection |
| Individual Bag | Packaging |
Surface finishes for C-103
Coatings and treatments compatible with refractory metal on the processes C-103 runs on. Pick them in the quote configurator or call them out on the drawing.
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Steel Stamping
- Vibro Engraving / Scribing
Equivalent designations
Standards and trade names that resolve to Refractory Metal C-103 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R04295
- Trade names
- Niobium-Hafnium
- Other
- Nb-10Hf-1Ti
Stock forms
Raw-material forms FabDigit sources C-103 in.
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.