Document baQYJ9BpoO8w63bog6m67zbeO

Manville Service Corporation Research & Developmeni Center Ken-Caryl Ranch Denver. Colorado 80217 303 978-2000 August 23, 1984 Mr. M. Caprio Aluminum Co. of America Pittsburgh, PA. REF: AMOSITE FIBER CRUDY CONTENT Dear Mr. Caprio: With reference to my letter of June 6, 1984, on the subject matter, we have now completed the initial comparative testing of Amosite fiber crudy content between Mine Laboratory and Manville R&D. Also, observations made by Plant and Alcoa, Warrick (W. Lansdale's letter, dated July 2, 1984) on the product quality with different grades of Amosite have been received. As mentioned in my previous letter, the purpose of this exercise was two fold: 1. iron out differences in test results between the two locations, 2. establish a specification limit for the maximum allowable crudy content in the fiber supplies. The table in the Appendix shows the comparative test results on the crudy content of three samples of each of the grades S-ll-65 and S-33-85. These samples were randomly selected from Billerica plant and tested at the two locations. Manville tests were conducted with corrected waterflow in the Elutriator to correspond to that of Mine's test apparatus. The Manville equipment was still found to give 3 to 7 % (avg 5 % ) lower reading. We will continue to investigate this through more testing on counterpart samples at both the locations. Received SEP 06 m purchasing Mr. M.. Caprio Page 2 An analysis of Mine's results on the different samples showed that the crudy content level of Amosite grade S-33-85 is similar to that of S-ll-65 grade supplied back in 1976. Observations made by W. Lansdale and Billerica plant also confirmed great improvement in the finished product quality of Molten Metal Marinite made with S-33-85 fiber, although further improvement is desirable. Considering the above situation, my recommendation is to set a tentative specification limit at 20% maximum crudy content in all the Amosite fiber supplies according to the Mines test. And, until we solve the 5 % difference in the Manville Elutriator test, our guideline will be 15% maximum. In continuation of this joint program to improve Amosite fiber quality the following steps will be taken: 1. Mines will continue working to further reduce the crudy content. 2. Billerica Plant will sample fiber from every incoming shipment for testing at the Mines Lab and Manville R&D. 3. Alcoa and Billerica plant will continue monitoring finished product quality with any changes in the crudy content of fiber. The cooperation of everyone concerned will be highly appreciated. Yours truly. Asit Chaudhuri ELUTRIATOR CRUDY CONTENT, % Amosite Fiber S-ll-65 S-ll-65 S-ll-65 S-ll-65 S-ll-65 (1976)* (3/82) (7/83) (9/83) (3/84) Comparative Tests S-ll-65 (061.4) - 1 S-ll-65 (061.4) - 2 S-ll-65 (066.4) - 3 S-33-85 (060.4) - 1 S-33-85 (054.4) - 2 S-33-85 (053.4) - 3 S-ll-65 (Spl.f 82-4) S-ll-65 (Spl., 93-4) Mine Lab 19* 26 30 35 28 29 34 25 19* 17* 18* -- -- *Proposed spec - 20% Max (Mine Test) 15% Max (Manville Test) Manville -- -- -- --" 24 29 19 12* 14* 14* 17 12 FROM L. L. GRUBB Quality Assurance Alcoa Forging Division-Cleveland Confidential TO MR. THOMAS B. BONNEY Pittsburgh Office -rp , * ;$78 1978 September 26 RE: SURVEY OF ASBESTOS MATERIALS Attached is the asbestos material survey listing for the Cleveland Works, including our Permanent Mold Division. As you know, we have just had a concentrated drive to replace every item containing asbestos. Our listing is therefore short and within the next month we expect to virtually eliminate asbestos gloves, mittens and pads based on tests that are under way. No substitutes are now in view for the special gaskets listed but we are certain that some will be located. Ceramic fiber and aramid cloth have proven capable of satisfying almost all of our requirements for high temperature insulating applications. L. L. GRUBB LLG:RK Att. cc: C. R. Gillespie/J. M. Fox - Cleveland R. L. Garrett - " T. F. Arnold - R. H. Heller/F. P. Haluska/W. P. Wilson - George Crook - " 6k. R. Farneth/W. E. 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