SATPC0038307 Tab 04 4 Specs_Redacted.pdf
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This document is a Procurement Specification for Crack IQI (Image Quality Indicator) and Shim components for NASA Johnson Space Center, dated May 06, 2025, Revision A. The specification details precise manufacturing requirements for titanium alloy (Ti 6Al-4V) components with multiple critical parameters:
Crack IQI components include cylinder-shaft assemblies in four thickness variations (0.030", 0.050", 0.100", 0.200"), with specific manufacturing requirements such as electron beam welding, surface finish of Ra 0.8 micrometers, and tight dimensional tolerances. Shim components include four thickness variations (0.020", 0.033", 0.067", 0.133"), also manufactured from annealed titanium bar with similar surface finish and tolerance specifications. Both component sets require precise machining, etched markings, deburred corners, and a certificate of conformance. The objective is to develop and validate a standardized crack IQI design and manufacturing process, with extremely tight tolerance controls including surface roughness, straightness, and interference fit specifications.
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| File | Type | Posted |
|---|---|---|
| SATPC0038307 Tab 07 Capability Statement FBO Posting.pdf |
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Crack IQI and Shim Procurement Specifications
NASA Johnson Space Center
May 06, 2025
Rev. A
Crack IQI Procurement Specification
• Objective: Develop and validate crack IQI design and manufacturing with goal of standardizing crack IQI specification and use
Thickness
Tight interface simulates crack for radiography
Crack IQI Schematic
Notes:
1. Material: Annealed Ti 6Al-4V Bar per AMS 4967
2. Number of Cylinder-shaft assemblies: 1 each
1. One for EB weld
3. Crack IQI Thicknesses from each assembly and Marking
1. 0.030” (3 each), Etch Marking: CIQI-Ti-0.030
2. 0.050” (3 each), Etch Marking: CIQI-Ti-0.050
3. 0.100” (3 each), Etch Marking: CIQI-Ti-0.100
4. 0.200” (3 each), Etch Marking: CIQI-Ti-0.200
4. Grind Crack IQI faces to surface finish of Ra 0.8 micrometer (32 microinch)
5. Deburr OD corners
6. Deliver left over cylinder-shaft assembly, 1 each
7. Both parts made from the same piece of bar stock
8. FN 1 shrink fit tolerances on the cylinder hole and the shaft per
ANSI B4.1
9. Hole interior and shaft exterior surface roughness desired (√):
Ra 0.1 to 0.4 micrometers (µm)
10. Crack IQI interference average gap desired: ~2 micrometers
1. Measured by NASA or if possible, by vendor 11.Dimensions in inches. Surface finish in micrometers.
12.Tolerance: X.X = +/ 13.0.1, X.XX = +/ 0.01. X.XXX =+/ 0.002 Unless
14. Provide a certificate conformance to above requirements
Marking Region
2X R.10±+01
2X .06±.01
1.00±.01
Ø 1.00
Ø 0.5000 -0.0000 +0.0004
Crack IQI Cylinder Crack IQI Shaft
1.70 ±.02
Ø 0.5000 +0.0005 +0.0008
±.05
A
2X BREAK
EDGE 0.03
MIN
2X BREAK
EDGE
0.005 MAX Ø.0001
Ø.0001
.0005 A .0005 A
Crack IQI Parts
ANSI B4.1
1.50±.01
Ø 1.00
Crack IQI Cylinder
±.05
A
2X BREAK
EDGE 0.03
MIN
2X BREAK
EDGE
0.005 MAX Ø.0001
.0005 A .0005 A Straightness
Cylinder
2X R.10±+01
2X .06±.01
Crack IQI Shaft
2.20 ±.02
Ø 0.5000 +0.0005 +0.0008
A
Ø.0001 Ø.0001
Shaft
~0.021
~0.680
~0.030
0.100±.001
CUT
2 PLACES
Cylinder-shaft Assembly and Cut Plane
Disc to Ring Weld Attachment for Each crack IQI Slice
Notes for Disc to Ring Weld Attachment for Each crack IQI Slice
• Method: Electron Beam weld of Cylinder Shaft assembly before slicing individual Crack IQIs
~0.021
~0.680
~0.030
0.100±.001
CUT
2 PLACES
EB Weld (4 places, along entire length)
Shim Specifications
• Notes:
1. Material: Annealed Ti 6Al-4V Bar per AMS 4967
2. Shim Thicknesses and Marking
1. 0.020” (1 each), Etch Marking: SHIM-Ti-0.020
2. 0.033” (1 each), Etch Marking: SHIM-Ti-0.033
3. 0.067” (1 each), Etch Marking: SHIM-Ti-0.067
4. 0.133” (1 each), Etch Marking: SHIM-Ti-0.133
3. Grind/machine shim faces to surface finish of Ra 0.8 micrometer (32 microinch)
4. Deburr OD corners
5. Dimensions in inches. Surface finish in micrometers.
6. Tolerance: X.X = +/-0.1, X.XX = +/-0.01. X.XXX =+/-0.002 Unless
7. Provide a certificate conformance to above requirements
Shim Thickness
Ø 1.00
Marking Region
| Slide 1: Crack IQI and Shim Procurement Specifications |
| Slide 2: Crack IQI Procurement Specification |
| Slide 3: Crack IQI Parts |
| Slide 4: ANSI B4.1 |
| Slide 5: Cylinder |
| Slide 6: Shaft |
| Slide 7: Cylinder-shaft Assembly and Cut Plane |
| Slide 8: Disc to Ring Weld Attachment for Each crack IQI Slice |
| Slide 9: Shim Specifications |
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