Document mBy9mexz8Vp8pYV8gadjwmvE4

* it T.R. Toreboll - Wsrthegwi H.J. o*Bvim - Nadlle PlttrbtBgh 8toel Ouqpasqr Xoaagrtoaa ffh--t A Trte Go* Wheeling Steel Ocfay State Stafl Ssmss. -rofl-yaw With nftMM to Mr* SJU Tonkins' letter of Jaaoray 9th te 0, &ne and alsoQ* fia*e* latter of Janasry 21ot to ae, lt% J.G. Crsuftaxd has nontoetod Pittsburg District cod has ooos to an agracaeat dth the* that tolsaranoea sheas la Finished product Specification tut K 1915 smarted rayarse Blocks, dated oad pegs 2 data! 3/fc/L, dH apply cs these irici) Sdadsll Dreader type taaaoee lasted of Iff 1915 smarted Soperec Blocks* The mbs art of teSsnaoee is the Vhddsd Pnkhirt Speclflostlon dll apply idiatfaar or art Mods am slliaatod* Xh order to peasant eonftaden cs this point, a ana sheafing the title of the lialrtod FXodart Speelflea&ien an Sdadell Dreader type Mods to ha aa fbUowet Speodal Tolcraaoa Blochs Bapeatwx desks or IS 3915 Smortdd I This title is being given to csvar the tolerenoe* oa this type of astssial heoaaoe It will art aaIf spply to ftrtntail Brassier ardsrs, hot to other onetenan sho require the Sana tleoe tolsrcuaao* We are ashing Bsadqaarftans' Seles Bspsrtamt to notlQr all distrlrts of this tsrdnolocr bo that ifcaa orders are lambrad at tbs pleats, tbqr dll ha tasted aad imported sgdnst this does telenmoe specdfiessSea* E.C. mnSTBCOf S6I*ms i City C* laflathitta Badaeod City C4* da 9!jfar X* V.Bmdaaffi J* 6* Gbnmfbrd, Jr* B* 1* Bite - Murillo /. CC-JlP9{r* ft mo m Bos 91 February 19# 1953 1H01A1DDM V, S. Steal Ccpp. Horrlsrills, Pa, Swindell Dressier Ooap, Pittsburg Pm* Puparsac for Cormr Type Amealere Gn Wednesday, February 11* an inspection mas nade of the three Swindell Breeeler oarers that had bean pet through a heating cycle at the subject neayiy pleat in drying out furnace basts, Thaee earn furnaoe #9# #10, mad #11* The Inspection was aade by Messrs. Langlay, Burleson, Lindstrm, Jaeobe, Bird, Klxon, Iekler and the writer all free Johne Hrnrm* and Messrs. Pugslay and Poraben of Swindell Dressier. Mr* Kelly and too ethers firm the Steel Corporation ware also present part of the ties, ill three of the furnaces had bean heated qp to 1500 degrees in aooordanee with the following eyelet 50 degrees per hour v to 800 degrees then held at 800 for 2 hoars. 50 degrees per hear ^ to 1000 degrees than bald at 1000 for 2k hours. 50 degrees par hour wp to 1200 dagreoa then hold at 1200 for 2b hours. 50 degrees per hour up to 1500 degrees than held at 1500 for 96 hours. The furoaees vere then aliened to cool. Too of the three furnaces had started the second cycle end bed reached 1000 degrees *n inspection of the third fixmaoe raised the question uith 8. S. Steel as to the durability of the lining primarily based on their unfhailiarity with the surface shrinkage of Sqperex Blocks. Thetwo furnace* balng heated in the second cycle spare then turned off and aliened to oodl eo that all throe furnaces ware cold at the tins of our sisit* It bad bean reported that joints at the enda of the block extended coqpjtetely through to the shell. Our erwrination lndloatod this to be true In one" or two cases only and that tha bulk of the .blocks ehewad a hot faoe shrinkage that was within tha expected dimension ehmgo of the block. That is the hulk of the blocks assured were less than 3/16* abort of the naninel lfi" length which is within the 15 noaml ahrinkage of mtreatod Bqporsx Blocks. Thsse three furnenes all were built with untillasted 8aperex wade to doso illam aicnal toleraaceo of 1/16*. The reason for using unsillcatod blockr rather than the HZ 1915 type material that has bean used la the pest 15 or wore years wee to rdearor to get may firm smart nnsl joint openings batwean blocks with ths HZ-1915. Sines standard Soperex HLoeks shrink oonaldsrefaly Ism than the treated block it was anticipated that the joint opening would bo materially lessened in this eonstrueticn even though ths blocks oould not bo oomnt bonded together# tha seat apparaat open Joints vara between the Modr ends at tho side valla of . tba teases and alao blocks appeared to bo looaa from tha ahall In mm eaaaa aa nok aa 1/2* , Bide valla vara tled book to tba ahall vlth aqoara vaahar and ' throat bolt on aboat J or h ft. eontera* Ms apparently vaa not moo* to ksep tha in plaoo tightly against tho ahall vlth tha imnnawntait KLooh, Ini ft**** arm tba hott oatperil on of tba tenses lnnoxval oparation alaoo they are alanet entirely aoroaaai by radiant ttbaa, appeared to ba la good ooo* dltion vlth no oTlltnm of awtaailva shrinkage. Ihoao and valla vara not aabjeeted to nemal hasting, however, ainoa it vaa raportad that only tba bottom radiant tabo hrt boon fired ainoa tba famaoaa vara operating only to toy tba baaaa and vara not balag aaad for omaallng oaila Sta aano opan Joint at tba anda of the block vaa widowed in plaoaa in tha roof but tba vorvt dafaet in tba roof vaa ovidanoaiof tba too looaa fitting rows of field eat toy blocka in approortvately the eontar of tha onto. So ona fornaoa ona of thee# blocks bad evidently aplit ten tha length of tha block and the pieee had baon tea nailed Into plaoo daring the original eonstmo- tlen of tha fanaea arafc, Ibis toe nailed p*oee had fallen oat of plaoa end vaa, S believe the reel start of tho Stool Corporations investigation of the fanaea valla* Examination of tho eater shell of the fanaoe showed no evidence of hot mpmtm due to btodooIto boat transfer at tha block Joints saeh as vould be ton by boned dltwinxBi paint on tha shall. For comparison, three other famaoaa vara looked at that had not bean sabjaetad to hast. Ona of these vaa an votrsated block lined fumaoe, a aeoond vas aa KZ 1915 block lined fanaea aid the third a BWf 1-20 brick lined tenses, In cna of tha block famaoaa, tha roof appoarad to bo very vail installed vlth tha Key blocks oat and filled axesptienally veil* lbs vails appeared to bo tight in tho fnmaoe with no open Joints, In the othsr Sqawx lined fanaoe, however, the fit of tho field eat leys in tho famaoo roof vaa --*r^rflly poor and appeared to bo almost as bad as tha Kays in the previously inspected heated fumaees, Mr, Pugslay initiated that these Kays ba raplsoad and In order to faeUitato thair replaomant. Insulating firebrick keyi would be oaed ainoe tha application of waits in this location could be more readily gooeapliahad, ill work has. to >edcns from the Inside of tha furnace aa than **ls a valdsd on oovar over tha aroh. It la our understanding that one of tha furnaces with wiww ma vail aa tha brick lined fanaea were to be given tana heating oyale as those ve inspected and that another inspection will be made next weak to get a comparison of tha behavior of the brick, KZ 1915 oowanted block and untreated uneatented Superax, JCCtlQ oot K, C, lindatron X, V, Borlason R. Jaooba^UnTiK--' "r H, Bird 1U H* Langlay-Plttabargh H, K. Sixan-Rziladalphia I, Ieklar-FbUadalphia J, C, Craaford, Jr, ;<