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STEP at a glance
STEP
Convert to STEP when the output is intended for engineering exchange between CAD systems, suppliers, manufacturing partners, or PLM workflows.
It is the right target for precise solid models and product data that must survive outside a single vendor's toolchain.
Choose STEP when engineering fidelity and interoperability matter more than lightweight visualization.
IGES at a glance
IGES
Convert to IGES when the receiving engineering system or supplier workflow still expects that neutral geometry format, particularly for curves and surface-focused CAD exchange.
It is useful for legacy interoperability and long-lived manufacturing relationships.
For newer product-model exchange with richer semantics, STEP is often the better choice.
Format comparison
| Feature | STEP | IGES |
|---|---|---|
| File type | Cad | Cad |
| Extensions |
|
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| MIME type |
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| Compression / quality | precise | precise |
| File size characteristics | depends | depends |
| Compatibility | limited | limited |
| Editability | high | high |
| Created year | 1994 | 1980 |
| Inventor | ISO TC 184/SC 4 industrial data standards community | U.S. Air Force ICAM program |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
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| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | rich | rich |
| Delivery profile | limited | limited |
| Workflow fit | design | design |
| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Supported |
| Structured data | Not supported | Not supported |
When to use each format
When to use STEP
- design authoring
- review handoff
- manufacturing exchange
- Strong neutral-exchange role in engineering.
When to use IGES
- design authoring
- review handoff
- manufacturing exchange
- Historically significant neutral CAD exchange format.
FAQs
Why convert STEP to IGES?
Convert to IGES when the receiving engineering system or supplier workflow still expects that neutral geometry format, particularly for curves and surface-focused CAD exchange.
It is useful for legacy interoperability and long-lived manufacturing relationships.
For newer product-model exchange with richer semantics, STEP is often the better choice.
What changes when converting STEP to IGES?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting STEP to IGES?
Check the exported file for Legacy compared with newer CAD exchange strategies.; Semantic fidelity can be weaker than more modern alternatives..