Document XRqEVw0MO8w1xpD7bGXyVq0Zy

AU1IC UniSTITUTE 122 CAST 42nd STREET NEW YORK, N. Y. June 3 1968 Commanding Officer Naval Ship Engineering Center 18th and Constitution Avenue, N. W. Washington, D. C. 2O36O Attention: Head Pumps, Blowers and Compressors Section Auxiliary Equipment Branch Bear Sir: Supplementing my letter of May 8, 1968, attached are copies of two additional letters of comment from pump manufacturers who attended the conference of March 25, 1968, in Washington, D. C., on the subject of military specifications for pumps. These letters deal specifically with problems con cerning metallurgical requirements of the military specifications for pumps. Copies of this letter and its attachments are being sent to all manufacturers on the Qualified Products List for Pumps. Very truly yours. PPA:eu Attachments: Frank P. Anderson Secretary Comments from DeLaval Turbine Inc* - 5/10/68 Ingersoli-Hand Co. - 5/20/68 cc: All Manufacturers on QPL for Centrifugal Pumps SLM00097 "Wau-l^eslaa, Foundry Company 1300 LINCOLN AVENUE, WAUKESHA, WISCONSIN 53186 414-542-6655 R. 33. OAIiR-ISrS Vice Prejidenl -- Soles, Costing Division June 14, 1968 SuPER 1 OR-LIDGERWOOO-MuNDY CORPe Superior WisconslN 54880 Attention: Mr. 0. W. Shea Purchasing Agent Gentlemen: Replying to your letter Alloys G Bronze and 70-30 Cupro FOR COMMERCIAL APPLICATIONS AND TIONS. of June 6, we cast both Nickel. We cast these TO MILITARY SPECIFICA- Our cost records reveal that the 70-30 Cu Ni will CONSISTENTLY RUN HIGHER THAN G BRONZE - FIRST BECAUSE THE BASE PRIGE OF THE METAL IS APPROXIMATELY 2 0 PER POUND higher; ano second, the yield on Cu Ni is lower. There IS ALSO THE added EXPENSE FOR BEND BARS THAT ARE REQUIRED ON THE MlL ITarV Spec I F I CAT IONS. We/would agree that the G metal is easier to MANUFACTURE, AND DELIVERY SCHEDULES WOULD BE SHORTER. The main reason for this, of course, would be that less TESTING BEFORE SHIPMENT S REQUIRED. t ions. Please let us know if you have any further ques- REC:jh SLM00096 1 DE LAVAL TURBINE INC. TRENTON, HEW JERSEY 08B02 TELEPHONE: S05-687-&000 CABLE ADDRESS: TuRBlNCO - TRENTON May 10, 1968 Serial WIHB-564. The Hydraulic Institute 122 East 42nd Street flew York, Hew York 10017 Attention: Mr. Frank P. Anderson Secretary Subject: RI/HAVSEC Meeting 25 Mareh 1968 to Discuss Problems of 70-30 Copper Nickel Reference: j (a) Aurora Pump letter by Mr. I. A. Jelly dated 2 April 1968 with copy to Mr. Anderson, HI Gentlemen: ; Ii 1. Reference {a) requested a reply to be directed to the Hydraulic Institute. 2. Re have no particular information, pro or con, to add concerning the specification, MIL-C-20159B, pertaining to 70-30 and 90-10 copper nickel castings. ; 3. The two military specifications, MH/-P-18472E, and MIL-P-17639C, covering pumps for fresh water service, permit a selection of materials for construction which va believe ia adequate * and do not, nt this time, recommend eny additional choices. Mo do agree, however, that Composition G ohould not bo ruled out in favor of 70-30 copper nickel when tha pump is non-critical and the life expectancy will bo satisfactory for the service intended. 4. A copy of the minutes of the subject meeting will be appreciated. Very truly yours, DE LAVAL TURBINE IRC. FJM/cc W, I. H. Budd Manager - Karine Engineering SLM00098 m Bngersoll-Rand Company nsintih'sjtvtl 7872 PHILUPSBURG. N. J. 06865 May 20, 1968 Hydraulic Institute 122 East 42nd Street Mew York, N.Y. 10017 Attention: Frank ?. Anderson Secretary Subject: Military Specification MIL-C-20159 Copper-Nickel Alloy Reference: NAVSEC-Hydraulic Institute Meeting of March 25, 1968, Washington, D.C. Gentlemen: Our concern has been successfully manufacturing pumps made of MIL-C-20159B Type I and II castings for many years. Reliable sources of supply and sound casting techniques have, been determined. While we can appreciate the problems a non-ferrous foundry may encounter in developing the technique and controls necessary to successfully cast a different material, we do not feel that producing Subject material causes the problems of expense and scheduling that one often hears. The ingot and spout cost of MIL-C-20159 Type I 70-30 Cu Ni is about the same as MIL-B-16541 valve bronze, and is less than MIL-B-16576 gun metal. As long as the world tin prices remain high there is no reason to believe this situation will change. The cost of MIL-C-20159 Type II 90-10 Cu Ni, is less than any^ of the materials listed above. Ingersoll-Rand Company converted one line of pumps we supply the Navy from valve bronze to 90-10 Cu Ni because of the manufacturing problems and shipping delays associated with the use of valve bronze as pressure castings. * The machining time for MIL-C-20159 is greater than MIL-B-16541 and MIL-B-16576. | ! i All AGREEMENTS COHTlNClNt UPON STRIKES.'aCCIDENIS ANO OTHER CONDITIONS BEYOND OUR COHTROl. All CONTACTS AHE SUBJECT TO Al'PROVAl. tit AN O'fiClfl OT Hit COMPANY. QUOTATIONS SUBJECT TO ChanC.C WITHOUT NOTICE. SLM00099 Hydraulic Institute 2 May 20, 3 MIL-P-18682B allows the use of gun metal or 70-30 copper nickel casings for surface ships. Since 90-10 copper nickel.castings are accepted as being equal to or better than gun metal we hereby request that 90-10 be added to the list of acceptable materials. A great deal of discussion has taken place concerning corrosior. erosion resistance of the various bronzes, copper-nickels, nickel-copper and austenitic stainless steels in fresh and sea water. While there is little doubt that the tin bronzes appear to offer the least resistance to this phenornona the relative ratings of the balance of these materials are subject to conjecture. We feel a government sponsored test of these mater in the cast and wrought form in fresh and sea water at velocity increments up to perhaps 100 feet per second would be of tremer. dous value to all concerned. These test results will permit the setting up of realistic material speed and velocity limitations. Such limits would permit utilization of the least expensive material suitable for the intended service. Very truly yours, INGERSOLL RAND COMPANY, C.G.McGinnis fm C-2 I.A.Jelly,Aurora J.M.Bartos M.F.Hagerstrom R. Fischer K. Cann Cameron Engineering Dept. SLM00100