Document 5D2maj1YQwKn7kQnmoDBp6ZGJ

Johns-Manville FINISHED PRODUCT SPECIFICATION PRODUCT: SDPEREX FURNACE BLOCKS (PLAIN) SUPEHEX FURNACE BLOCKS (SILICATES) DIVISION SPEC NO. PAGE NO. II 452-4 4. 7. QUALITY REQUIREMENTSi Notet Values determined on Superez Furnace Block (Plain) except as noted. A. Density (lbs/cu ft) '!r>. IMS. DEPT. Desired Maximum Maximum - 24# - 27# MAY 12 1959 Modulus of Runture (nsl) Minimum 60 Abrasion Loss (percent) 1. 10 min. - 40 maximum * 2. 20 min. 70 maximum D. Hardness (m.m. bj Plastometer) As Received Plain Sllicated a 2* 0.75 >az. (avg. 5 samples) 0.4 max. (arg. 5 samples) 0.5 Bax. (individual) E. Change after Soaking Heat 1. Hardness %k hrs. at 1900*F) - 0.9 m.m. maximum 2. Loss in Weight (24 hrs. at 1900*F) 10 nazisun F Linear Shrinkage (percent) (Tested on Unsilicated Block) X 1. After 24 hrs. at 1900*F - 2.5i* maximum C. Magnesia Content - 6j6 optimum VI. PACKAGING: Cases or cartons. Cases when sawdust is used. RETURN TO ).(A research fllE ROONT * Notes Trapezoidal Blocks for American Brake Shoe Co. (4" thick x 6" x 5-1/8") shall be packaged 12 pcs. per 11-5/8 x 12-l/2 x 56-1/4" carton. For additional packaging information consult Packaging Specification Magnesia and 5uperex 432-5. Form 333 5 Pld. In U.S.A. _________________________________ _____ _____________________________________________ v_ INDICATES_bfa?dn- change Reduction in shrinkage maximum from 51 to 2.5^ authority E.C. Lindstrom on basis of Waukegan test results reported FOR CHANGE in C.H. Jensen*s letter of 5/6/59_________________________________ SUPERSEDES: DIR. Q.C. MGR. Q.C. Page 4 aane specification issued 9/15/58 SUPR. Q.C. PROD. SUPT. PLNT. FN. RES. LAB. COM. W.D. R. C . MGR. Caches (Parlett DATE ISSUED 5-11-59