NASA/Lewis Research Center, 21000 Brookpark Road, Cleveland, OH 44135

68 -- CHEMICALS-ATOMIZED ARGON POWDER SOL RFO3-096243 DUE 050598 POC Jon C. Schultz, Contract Specialist, Phone (216) 433-2764, Fax (216) 433-2480, Email Jon.C.Schultz@lerc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/LeRC/date.html#RFO3-096243. E-MAIL: Jon C. Schultz, Jon.C.Schultz@lerc.nasa.gov. THIS NOTICE CONSTITUTES AMENDMENT NO. 1 TO THE COMBINED Synopsis/RFO FOR CHEMICALS-ATOMIZED ARGON POWDER SUPPLEMENTED WITH ADDITIONAL INFORMATION CONTAINED IN THIS NOTICE. Companies shall acknowledge all amendment(s) in their offer. This notice serves as the official amendment to the subject solicitation and a written amendment will not be issued. The purpose of this amendment is to provide revised specifications as follows: Specifications for Items 1 and 3: Cu-8 at.% Cr-4 at.% Nb (Cu-8 Cr-4 Nb) Powder 1. Powder to be made by argon gas atomization. Atomization in nitrogen is not an acceptable alternative. 2. Powder to be handled in inert gas or vacuum environment at all times to avoid oxygen contamination. Powder to be delivered to the Government in sealed glass bottles (to be supplied by the Government) under an argon or helium cover gas. Prior to filling the bottles, the bottles will be cleaned and degreased to ensure no contamination occurs. 3. Melt charge to consist of high purity elemental chargesor master melts. For an elemental charge, the charge will consist of OFHC copper Grade No. 101 (ASTM B 170 Grade 1, 99.99% min. Cu), 99.8% minimum purity chromium and 99.8% minimum purity niobium or equivalent purity materials. 4. The chemistry of the Cu-8 Cr-4 Nb powder will be: 7 Chromium: Aim- 6.65 weight percent Range -- 6.2 to 6.8 weight percent 7 Niobium: Aim -- 5.85 weight percent Range -- 5.4 to 6.0 weight percent 7 Cr:Nb ratio: Aim -- 2.03 Cr:Nb ratio by atomic percent / 1.14 Cr:Nb ratio by weight percent Range -- 1.9 to 2.15 Cr:Nb by atomic percent / 1.06 to 1.21 Cr:Nb ratio by weight percent 7 Oxygen: Aim -- less than 400 ppm by weight Maximum -- 750 ppm by weight Powder over 750 ppm oxygen by weight will be rejected. Note that the values of Cr and the Cr:Nb ratio are slightly higher than previous purchases to ensure complete conversion of Nb to Cr2Nb and avoid hydrogen embrittlement problems. 5. Powder to be sieved to -150 mesh prior to delivery. +150 mesh material to be disposed of by the Contractor. 6. Contractor to provide a powder size analysis and chemistry of the powder. The chemistry will consist of (at a minimum) Cu, Cr, Nb and O. The contractor is to test for O contamination prior to mixing powder from more than one atomization run. 7. ITEM 3: If the Government exercises its option to purchase 500 pounds of additional powder, the Contractor will keep the powder from each atomization run separate and provide powder size and chemistry data for each run. The government will supply sufficient additional glass bottles to store and ship the powder. Specifications for Item 2: Cu-4 at.% Cr-2 at.% Nb (Cu-4 Cr-2 Nb) Powder 1. Powder to be made by argon gas atomization. Atomization in nitrogen is not an acceptable alternative. 2. Powder to be handled in inert gas or vacuum environment at all times to avoid oxygen contamination. Powder to be delivered to the Government in sealed glass bottles (to be supplied by the Government) under an argon or helium cover gas. Prior to filling thebottles, the bottles will be cleaned and degreased to ensure no contamination occurs. 3. Melt charge to consist of high purity elemental charges or master melts. For an elemental charge, the charge will consist of OFHC copper Grade No. 101 (ASTM B 170 Grade 1, 99.99% min. Cu), 99.8% minimum purity chromium and 99.8% minimum purity niobium or equivalent purity materials. 4. The chemistry of the Cu-4 Cr-2 Nb powder will be: 7 Chromium: Aim- 3.33 weight percent Range -- 3.0 to 3.6 weight percent 7 Niobium: Aim -- 2.93 weight percent Range -- 2.6 to 3.2 weight percent 7 Cr:Nb ratio: Aim -- 2.03 Cr:Nb ratio by atomic percent / 1.14 Cr:Nb ratio by weight percent Range -- 1.9 to 2.15 Cr:Nb by atomic percent / 1.06 to 1.21 Cr:Nb ratio by weight percent 7 Oxygen: Aim -- less than 400 ppm by weight Maximum -- 750 ppm by weight Powder over 750 ppm oxygen by weight will be rejected. Note that the values of Cr and the Cr:Nb ratio are slightly higher than previous purchases to ensure complete conversion of Nb to Cr2Nb and avoid hydrogen embrittlement problems. 5. Powder to be sieved to -150 mesh prior to delivery. +150 mesh material to be disposed of by the Contractor. 6. Contractor to provide a powder size analysis and chemistry of the powder. The chemistry will consist of (at a minimum) Cu, Cr, Nb, and O. The contractor is to test for O contamination prior to mixing powder from more than one atomization run. Specifications for Items 4 and 5: Hot Isostatic Pressing (HIPing) of Cu-8 Cr-4 Nb Tube 1. ITEM 4: Cu-8 at.% Cr-4 at.% Nb (Cu-8 Cr-4 Nb) powder for Hot Isostatic Pressing (HIPing) run to be taken from ITEM 1. Prior to proceeding with the HIPing, the powder chemistry must be certified as meeting the specifications for ITEM 1. 2. The Contractor will produce a finished tube from the Cu-8 Cr-4 Nb powder with the following dimensions: 7 Length -- 30.48 cm (12 inches) 1 0.25 cm (0.10 inches) 7 Inside diameter (I.D.) 1.91 cm (0.75 inches) 10.25 cm (0.10 inches) 7 Outside diameter (O.D.) -- 13.33 cm (5.25 inches) 10.25 cm (0.10 inches) 7 In addition, the I.D. and O.D. will be concentric and parallel to within 10.375 cm (0.15 inches) 3. The Contractor will have sole responsibility for designing and fabricating the HIP can to meet the final finished tube size. 4. ITEM 4: The Contractor will fill, evacuate and seal the HIP can with the Cu-8 Cr-4 Nb powder produced as part of this purchase. ITEM 5: The Contractor will fill, evacuate and seal the HIP can with Cu-8 Cr-4 Nb powder either produced as part of this purchase or supplied later by the Government. 5. The can will be HIPed at 9550C (17500F) for 4 hours using a pressure of 193 MPa (28 ksi). 6. The can will be removed by the Contractor following the HIP run by either mechanical machining or immersion in sulfuric acid to etch away the can. Immersion in nitric acid is not acceptable since the acid will attack the alloy vigorously. If machining is used, the Contractor will supply the finished tube with the actual I.D. and O.D. being equal to the nominal dimensions. Specifications for Items 6 and 7: Cu-8 at.% Cr-4 at.% Nb (Cu-8 Cr-4 Nb) Powder 1. Powder to be made by argon gas atomization into liquid agron. Atomization in nitrogen is not an acceptable alternative. 2. Powder to be handled in inert gas or vacuum environment at all times to avoid oxygen contamination. Powder to be delivered to the Government in sealed stainless steel canisters under an argon cover gas. The canisters hold 50 lbs. of powder (but should be filled to no more than 35lbs. to avoid packing), shall be supplied by the Government, and shall be cleaned, degreased and sealed under argon or helium by the Government to ensure no contamination occurs. Prior to filling, the canisters shall be pressure checked by the contractor to ensure no leakage/contamination. 3. Melt charge to consist of high purity elemental charges or master melts. For an elemental charge, the charge shall consist of OFHC copper Grade No. 101 (ASTM B 170 Grade 1, 99.99% min. Cu), 99.8% minimum purity chromium and 99.8% minimum purity niobium or equivalent purity materials. 4. The chemistry of the Cu-8 Cr-4 Nb powder shall be: 7 Chromium: Aim- 6.65 weight percent Range -- 6.2 to 6.8 weight percent 7 Niobium: Aim -- 5.85 weight percent Range -- 5.4 to 6.0 weight percent 7 Cr:Nb ratio: Aim -- 2.03 Cr:Nb ratio by atomic percent / 1.14 Cr:Nb ratio by weight percent Range -- 1.9 to 2.15 Cr:Nb by atomic percent / 1.06 to 1.21 Cr:Nb ratio by weight percent 7 Oxygen: Aim -- less than 400 ppm by weight Maximum -- 750 ppm by weight Powder over 750 ppm oxygen by weight shall be rejected. . 5. Powder to be sieved to -325 mesh, with separate -150/+325 mesh fraction for Item 6 and Item 7 prior to delivery. +150 mesh material to be disposed of by the Contractor. 6. Contractor shall provide a powder size analysis and chemistry of the powder. The chemistry shall consist of (at a minimum) Cr, Nb, and O. The contractor is to test for O contamination prior to mixing powder from more than one atomization run. The due date for receipt of offers is extended to 5-12-98 (4:30 PM Local Time). Offers shall provide the information stated in the synopsis/RFO posted on the NASA Acquisition Internet Service (NAIS) on 4-3-98 and published in the CBD on 4-3-98. Documents related to this solicitation will be available over the Internet. These documents are in Microsoft Office Suite (Word 6.0, Excel 5.0, or PowerPoint 4.0) format and reside on a World Wide Web (WWW) server, which may be accessed using a WWW browser application. The WWW address or URL of the NASA/LeRC Business Opportunities home page is http://procurement.nasa.gov/EPS/LeRC/class.html. (0124)

Loren Data Corp. http://www.ld.com (SYN# 0368 19980506\68-0003.SOL)