Convert IPT to STEP

A supplier, CAM package, or non-Autodesk CAD system may require a neutral STEP file instead of an Autodesk Inventor part. Exporting the IPT model to STEP transfers precise CAD geometry without giving the recipient an Inventor license.

IPT and STEP formats

IPT is Autodesk Inventor’s native part-file format. It can contain parametric solid and surface geometry, sketches, feature history, parameters, materials, iProperties, sheet-metal data, and multiple solid bodies; Inventor assemblies are normally stored in .iam files.

STEP, saved as .stp or .step, is the ISO 10303 neutral CAD exchange format. It transfers exact boundary-representation solids, surfaces, curves, and, depending on the protocol and translator, body names, colors, assembly data, and limited metadata. STEP is accepted by most mechanical CAD, CAM, simulation, inspection, and product-data systems.

Use STEP rather than STL or 3MF when the recipient needs CAD solids or surfaces for machining, measurement, or further modeling. STL and 3MF are mesh formats intended primarily for additive-manufacturing workflows.

Exporting from Autodesk Inventor

Autodesk Inventor is the preferred converter because it opens IPT files natively and avoids a second CAD translation.

1. Open the .ipt file in Inventor. Resolve any missing references for derived parts, then update the model if prompted.
2. Activate the required model state and confirm that the intended solid bodies and surfaces are visible.
3. Choose File → Save As → Save Copy As.
4. Select STEP Files (*.stp, *.step) as the file type, then open Options.
5. Use the STEP protocol required by the recipient. Inventor installations commonly offer AP203 and AP214; AP214 is usually the better general-choice export because it can retain presentation information such as colors. Use AP203 only when a legacy receiver requires it.
6. Save the file, then open it in the receiving system or re-import it into Inventor to check body count, units, holes, surfaces, and critical dimensions.

If a customer specifically requests AP242, confirm that the chosen translator and its current version can write AP242. Do not assume every Inventor version exports that protocol.

Options without Inventor

Autodesk Fusion can open supported Inventor files and export neutral CAD formats, but its available import and export functions depend on the Fusion version, entitlement, and file type. Check the imported model before relying on it for production conversion.

CAD Exchanger is a practical desktop translation option when it supports the specific IPT version. Its browser service, CAD Exchanger Cloud, can also be used for occasional files; check its current IPT import support, output options, and upload limits before sending a file.

Online conversion is unsuitable for export-controlled designs, confidential customer data, or files subject to contractual data-handling restrictions. FreeCAD and Blender are not reliable native IPT converters; import support, if present through an add-on or intermediary, does not recreate Inventor features.

Compatibility checks

STEP exports resulting geometry, not Inventor’s editable feature tree. Sketch constraints, extrudes, fillets as parametric features, equations, iLogic rules, drawing links, model-state logic, and most Inventor-specific properties will not become editable native features in another CAD program.

An IPT with several solids may arrive as several bodies in one STEP file. If the recipient needs separate part files, create or derive individual parts from the required bodies before export.

STEP files include units, but verify them after import. An incorrect receiving-system import setting can make a millimetre model appear 25.4 times too large or too small.

Imported STEP geometry commonly appears as a "dumb" solid or surface model. Direct-editing tools can often alter faces or holes, but cannot restore the original Inventor feature history. Check small fillets, freeform surfaces, sheet-metal bends, interfaces with tight tolerances, and any modeled threads; cosmetic threads, drawing annotations, and PMI should not be assumed to transfer.