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STEP File Library

The STEP files available here are synthetic models that have been tested in the CAx Implementor Forum. These files have been checked for 'syntax' and 'structure', to be in conformance with the Application Protocols (EXPRESS schemas) they are instantiated against.
The Application Protocol 203 Edition 2 schema that the following files are based on can be found here:

The Application Protocol 214 schemas that the following files are based on can be found here:

Additionally, these files have also been "checked" for conformance with the various Recommended Practices in the scope of CAx-IF Testing, and have been successfully post-processed (imported) by the majority of the CAx-IF Participants.

PDES, Inc. and ProSTEP iViP are providing these STEP files to organizations interested in implementing the STEP standard. PDES, Inc. and ProSTEP iViP are not making any claims about the quality, performance, or usability of the STEP files. Users can import the files at their own risk.

Geometric Validation Properties


Click to enlarge		 'Geometric Validation Properties' are a capability to verify the geometry data exchange via STEP. The native system calculates a number of key properties for the CAD model (volume, surface area, center of gravity) and writes them as numeric values into the STEP file. The importing system, after creating the geometry from the file, also computes those properties and compares the results with values given in the STEP file. The deviations give a measurement of the exchange quality. The functionality is described in: Library files provided for this capability are courtesy of DataKit CrossCad for OpenCascade ("OC"), PTC Pro/Engineer ("PE") and Theorem Cadverter for UG NX ("TU").

unit
 volume
 validation_volume
 area
 validation_area
 cx
 cy
 		 cz
 		 validation_cx
 validation_cy
 		 validation_cz
 		 model_size
 extended_gvp
 date
 issues
AS1-OC-214 mm 764510 764510 141063 141063 90 75 18.8595 90 75 18.8595 263.735 na 24 Jul 2008
AS1-PE-203 in 765931.74 765931.7 141644.82 141644.8 -50 -1.1612773 0 -50 -1.185492 0.0001074690 268.0276 na 5 Sep 2008 Val Props II are not supported in Pro/E
AS1-TU-203 mm 764518.03 764518.03 141079.34 141079.34 90.0 75.0 18.8595 90.0 75.0 18.8595 248.91 pass 24 Jul 2008

Colors, 3D Annotations, Unicode characters


Click to enlarge		 'Colors' refers to the capability to style solids, surfaces and edges in a CAD model. '3D Annotations' allow to display text strings in the 3D model. These may be styled (color, font) and associated with the geometry. 'Unicode' allows to include special characters (e.g. Asian) within the annotations. The functionality is described in: Library files provided for this capability are courtesy of PTC CoCreate Modelling ("CM") and Theorem Cadverter for UG NX ("TU").

unit
 volume
 area
 cx
 cy
 		 cz
 		 color_t1
 color_t2
 color_sd
 color_f
 color_e
 valid_txt
 valid_txt_assoc
 date
 issues
IO1-CM-214 mm 78234.44912 21137.41384 12.733476 0 0 green green all all na all all 15 Aug 2008 no edge color
IO1-TU-203 mm 78177.78 21105.70 12.7016 0.0 0.0 blue blue all all na all all 24 Jul 2008 Cannot apply edge colour in UG. Separate curves created for each relevant edge and styled blue. Hence no over riding edge colour.

External References


Click to enlarge		 'External References' refers to the capability to split an assembly into several STEP files during import. For each part used in the assembly, one geometry STEP is created. The assembly structure is written to either one separate STEP file, or it is also split into several files, where each files contains one level of the assembly tree. The latter approach is refered to as 'nested external references'. The functionality is described in: Library files provided for this capability are courtesy of Dassault Systèmes CATIA V5 ("C5"), PTC Pro/Engineer ("PE") and Theorem Cadverter for UG NX ("TU").

unit
 volume
 area
 cx
 cy
 		 cz
 		 fref_found
 fref_processed
 date
 issues
S1-C5-214 mm 380363.741 438000.753 -31.476 0 -1.856 all all 18 Aug 2008
S1-PE-214 cm 797.71422 4615.6689 8.0523028 0 0.086624583 all all 5 Sep 2008
S1-TU-203 mm 817892.05 462703.51 336.916 0.061 -0.848 all all 24 Jul 2008

Material Identification and Density


Click to enlarge		 'Material Identification and Density' refers to the capability to transfer basic information about the material a part is manufactured from in the STEP file. Both a basic, primarily informational, and an advanced approach is given. The latter is the preferred one, and used in the STEP files available below. It ensures interoperability with both PDM and CAE implementations. Therefore, the material is given as a product with a relationship to the part, and the density is defined as a property of the material. The functionality is described in: Library files provided for this capability are courtesy of DataKit OpenCascade ("OC"), Siemens PLM Software NX I-DEAS ("ID") and PTC Pro/Engineer ("PE").

unit
 volume
 area
 cx
 cy
 		 cz
 		 gravx
 gravy
 		 gravz
 		 density
 material
 date
DM1-ID-214 in 6.66134 49.3543 na na na 1.25611 0.58368 1.9685 .160 lb/cu in AMS 4928; Titanium 6-4 2 Feb 2009
DM1-OC-214 mm 108454 31557.7 16.7762 -50 17.2991 27.7422 -50 15.3115 4.423001 g/cm3 AMS 4928; Titanium 6-4 24 Jul 2008
DM1-PE-214 in 109159.9 31841.393 0 14.949911 18.38009 0 14.949911 18.38009 0.160 AMS_4928 12 Jan 2009

Supplemental Geometry


Click to enlarge		 When designing a part in a CAD system, geometrical elements are often created that do not belong to the actual, i.e. manufactured, shape of the part or assembly, but are used to either create other geometric shapes, or to carry additional information about the part or assembly. These elements are - in accordance with e.g. ASME Y14.41 - called 'Supplemental Geometry'. The functionality is described in: Library files provided for this capability are courtesy of Dassault Systèmes ("C5")

center_line
 ref_plane
 tool_tgt
 date
SG1-C5-214 na full supp. full supp. 27 Aug 2010

For more information, send an email to: CAX-INFO-L@SCRA.ORG

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