Thermal Shock Resistant Ceramic · Nitride Ceramic
Silicon Nitride
Silicon Nitride is a thermal shock resistant ceramic ceramic — high-toughness silicon nitride. Typical values: 700 MPa yield, 3.2 g/cm³, rated to 1,400 °C. Available for CNC machining at FabDigit.
Properties
Typical room-temperature values for the default supply condition. Metric first, imperial in gray. The bars show where Silicon Nitride sits against the other 11 ceramic grades in the catalog.
Datasheet
| Yield strength | 700 MPa102 ksi |
|---|---|
| Tensile strength | 800 MPa116 ksi |
| Hardness | 1500 HV≈ 1425 HB |
| Density | 3.2 g/cm³0.116 lb/in³ |
| Specific strength (yield ÷ density) | 219 |
| Min service temp | -200 °C-328 °F |
| Max service temp | 1,400 °C2,552 °F |
| Electrical conductivity | < 0.001 % IACSinsulator |
| Machinability | Poor20 / 100 |
| Weldability | Not recommended5 / 100 |
| Formability | Not recommended5 / 100 |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other ceramic grades
Strength versus weight in the ceramic family
Yield strength against density for every ceramic grade FabDigit runs. Silicon Nitride is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to Silicon Nitride. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Poor20 / 100 |
|---|---|
| Cutting speed (rough / finish) | — / — |
| Minimum wall | — |
| Minimum internal radius | — |
| Drill depth limit | — |
| Best surface (machined / polished) | Ra — / — |
| Hardenable after machining | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on Silicon Nitride, 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 Silicon Nitride
Coatings and treatments compatible with ceramic on the processes Silicon Nitride 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
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Vibro Engraving / Scribing
Equivalent designations
Standards and trade names that resolve to Silicon Nitride in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Sintered Silicon Nitride
- Other
- Si3N4
Stock forms
Raw-material forms FabDigit sources Silicon Nitride 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.