PROBLEMS OF THE CZECH STEEL INDUSTRY AND MEASURES BEING TAKEN TO OVERCOME THEM

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP82-00457R010200240009-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 10
• Document Creation Date: December 19, 2016
• Document Release Date: March 2, 2006
• Sequence Number: 9
• Publication Date: February 4, 1952
• Content Type: REPORT

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-nT'nr1 I('- mfrYC . ca fva~r nT A T [+ r1N7 V 4!~~
- -- - - 3i;CURTTY. INFORMATION
A
CENTRAL INTELLIGENCE
GENCY
INFORMATION REPORT
COUNTRY Czechoslovakia
CD 0.
DATE DISTR.
SUBJECT Problems of the Czech Steel Industry and NO. OF PAGES
25X1A Measures being Taken to Overcome Them
NO. OF ENCLS. - 2 (9 pages)
(LISTED BELOW)
SUPPLEMENT TO
REPORT NO. -
THIS DOCUMENT CONTAINS INFORUATION AFFECTING THE NATIONAL DEFENSE
OF THE UNITED STATES. WITHIN THE UEANING OF TITLE 18. SECTIONS 793
DO NOT Mon ATr
25X1X
1. As a result of the critical shortage of certain alloying elements the number
of types of refined construction steel being produced in Czechoslovakia has
dropped from 78 to about 28. The production of chrome-nickel steel (Poldi types
TEI and TEM) is allowed only by special permits The former Poldi plant of the
United Steelworks is therefore introducing alloyed construction steel with a
minimum of nickel for hardening (sic) Poldi types NC 2, % !i., 13EV 2 and BEV 4,
This alloy will be used for items formerly manufactured from TEI and TEM steel,
such as heavy duty cog wheels, transmission shafts and spline shafts, and will
require the redesign of many of these items,.
2, A critical shortage of cobalt and molybdenum is becoming apparent in the manu-
facture of high-speed steels. Only two types of tungsten steel, maximum
special G and maximum special G extra, are being produced regularly, Cobalt
steel ME and ME special is manufactured only for the production of chrome steel
ball bearings.
An effort is being made. by the laboratories of the Vitkovice Ironworks to find
a suitable substitute for molybdenum in the manufacture of steels for use under
high pressure and temperatures of 500? centigrade and above. Satisfactory results
have been reported by using twice as much tungsten in the alloy as molybdenum
was formerly used.
Since the beginning of 1951, a shortage of cemented (slinute) carbide plates
used for the manufacture of cutting instruments has become apparent. Imports
of these plates
4 Feb? 1952
has 25X1
ceased and domestic production, especially or ose p a anium,
has caused difficulties. The United Steelworks in Kladno oxidizes the titanium
to form T102 under high temperature thus causing the edges of the cutting
instruments to become brittle. During 1951 tests have been made:,-,to burn
carbides in a neutral atmosphere in order to prevent the formation of the
oxide (sic). Because of the shortage of cemented carbides, all development
work concerned with the use of cemented carbides for other than cutting
instruments has been stopped.
Attachments: I Specifications of Poldi Alloy Steels, types NC
BEY 2 and BEY 60IIAII
II Seventh Conference of the Technical Co
Treatment of Steel
JSTATE
ARMY
CLASSIFICATION
NAVY X NSRB
X AIR X FBi
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2, NC' ),
25X1
 Approved o&946I&3/4&bC4 E90@4 8010200240009-7
CENTRAL INTELLIGENCE :AGENCY
ATTACHMENT I
United Steel Mills, National Corporation
Praha II, Opleta,ova 35
Trade Mark Poldi
NO 2
AV-rage
chemical
composition
Condition
Natural Annealed
Tempered
(0
0 61 2 mm) 32
mm
)
30 min
(0 )
7200C
65000
?
Heat trestia !
4 hours
1 hour
83000 (oil)
in furnace
in vir
Tensile
stress
34.7
t~5,6
57.3
kg/mm2
31.3
39-7
Average
-
mechanical
Intensity of J
tensile ?sM
85 55.4
53-1
boa8
59.4
94.o
qualities;
-------
~__.
Toughness of
notch *'*
27.2
s
23.5
10.5
Meena ,er
19.0
19.6
mk8/cm2
Strength of
hardened
62
co
layer
a
_...__..._.__ w
_..._...._... ._..
Foy ping 1100 800?C
Annealing? cca 7200C /,4
hours, cool
slowly In
Heat
furnnoe
Hardentngb. cea 87000
treatment
Simple 8300C
(o1l )
Tempering`;: double 86000
(oil) - 810
0C (oil)
Drawing
(popousteni) 150 - 20300 for a pe
riod of
1- 2houz?c
Result of tempering
Dimensions
Heat ?
Streng
th kg/mrn2
of di6 s
treatment
Edge Mi
ddle Edge
(Vysledek kaleni
0 60 x lomm
83000 oil
129
129
11
kotoucu)
0 60 x 30mm
8300C oil
91
90
82
Remark
Mez prutanosti
PTevno st v tahu
rub. houzeva.
Y
SECR:.T/CONRTOL - U S. OFFICI A.LS ONLY
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Chromonickel structural steel for hardening
(Chrornoniklova konstrukcni ocel k cerrientovani )
`- r
0.17 0.80 0.25 0.90 0.55 0'-05
 ATTACHMENT I
United Steel Mills, Nationrl Cornor^tion
Prq.ha II., Onletalovn 15
Trp.de lnark Polai
NC 4
chemi :l .'Q 0 22 ` 0. 10 0.25 0.90 0.55 - 0.05
composition Condition Natural Annealed Tempered
32 mm) (0 32mm) 30mm)
r'.Ctar~ n~
u-'
Approved FtdR&SW10' /'I *ti9! o W 0102OO24OOO9-7
CENTRAL INTELLIGENCE AGENCY
He-'
tre!.t-
merit
Tensile
stress"
Average
mechanical
qualities
kg/mm2
Intaneity'of
t"r ile test7-11-
kg/mm2.
Toughness of
notch ***
Viesnager
mkg/cm2
Strength of hardened
layer
Chromonickel structural stael for hprdening
(Chroroniklovc 'ronstrukcni ocel '_: cemAntovani )
J
111111 cca F;2 Ro
flea t
treatment
Result of
te! pering
of discs
of various
casts
C c Mn Si Or Ni V
9
2
?C 650?C
7
0
4 hours 1 hour 8300C (oil)
in furnace In air
48.3
59.5
3'1 U 6
49.0
65.5
6302
102.7
57.7
71,3
11309
19.5
1
7,5
2267
14. 6
i
506
800?0
Forging 1100
Tempering
720OC Z 4 hours, cool slowly In
furnace
cea 8700C
simple 830?C (oil)
double 860?'C (oil) 81.0?C (oil
Dr,~ ., frig
(popoust-ni~G 150 -- 200?C for a peri
od of I - 2 hoia
Cast
Dimensions
Heat
Treatment
S
i.dgre
trength k g/=2
Middlx -Ldge
A
0 60 x
10
83000 (oil)
132
115 139
A
0 60 x
10
8300c (oil)
106
95 1..,06
A
A60x30
8300C (oil)
"
101
90 101
1 B
60 x 30
0 (.oil )
830
96
85 97
Remark.
Ifez prutaznosti
Pevnobt v tahu
A-10 Yru . houz.v a~
81.CP~;.T/CONTROL - U, S,OF?4'ICIALS ONLY
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CENTRAL INPELI IGENGE AGENCY
ATTAC:1`,I I
United Steel Mills, Natl.oual Corporation
Pr^.ha II., Opletalova. 35
Trade Mark Po l di
B'a7 -1 V 2
Av s rn.;
chmraic;s3.
Chroinnnicke1 structural steel for hardening
(Chromoni . ova konstrukcni ocel pro cer-ntovPn'1)
crv ositlon 0-17
Condition Natural
3? mm)
Hep.t
trefi t--
m-nt
Tensile
Average stress*
kg/mm2
`~-
t-
'
I nt a nv it y of
oualItl.es ten'ile test" Q0
k C/=2 Toughness of
notch **%'
Me sn?.ger
mkg/cm2
Strength-of hardened
layer
For6ing
Mn S1 Or Ni V
0480 0025 0.9o 1.45 0.05
Anne^1.d _. ~ Tempered ------
(0 32mm) (0 3Omm )
7%O?C 6501?C
L; hours 1 hour
In furnRo:e In air
3703? 46.3
596 67e4
72,6 2100
cca, 62RQ
huine-.iln,6 cca 72000, 4 hours,
treatment
H 4 .r. clening
k erfr?~?"T'.r n ~; t double 860?C (011) - 8100C (oil)
DrawZ.ng 150 - 200?C for a period of 1-2 hours
Result of
tempering of discs
Remark
Rez prutaznosti
Pevnost it tn.hu
Vrub. houzevn.
n. 1100 - 800`'0
cca 870?C
830cC (.oi1)
71.3
1.04.0
114
cool Slowly
Heat
Treatment
60 x 10 mm 830?C (011)
0 60 .x 30 mrn 83000 (011)
3trangth kg/Lamy
Edge 2:1.dd1_e ? ;age
U :. 21, OFFICIALS ONLY
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CENTRAL INTELLIGENCE AGENCY
ATTACHMENT I
United Steel Mills, National Corporation
Praha II., 0pletalov&. 35
Trade r-lark Pold9.
B1V 4
,Werav,-
ohemieal
a)mnoeitlon
Condition
Average
mechanical
qualities
Heat
treat-p
went
Tensile
stress*
kg/Lan,2
Tout, hness of
notch**
Mesnager
mkejca12
btrength of hardened
layer
Chromonickel structural steel for hardenth
(Chromoniklova 1.onstrukoni or, e1 pro cenantovani )
C ! Mn 3i Or Ni V
0,.22 i 0.60
I Natural
(0 32 rain)
100
0, 0,25
0. 90 1.45 0005
Annealed
(0 3 2mw )
Tempered
(0 3omzr)
72000
4 hours
In furnace
65000
i hour
In air
8300C (o11)
4001
45.5
84.6
3706
4802
7369
38.2
67.3
7405
66.2
71.6
123.0
62=0
73=0
114.0
62.4
8060
115.4
17.5
17.5
760
196
14.5
8.6
20.3
15.9
10.1
.eoa 62 no
: 1.100
Annealln ? cca. 7200C, 1( }-ours, cool slowly in
Heat
treatment
Result of
t'.pcring
of discs
Mez p rutaznosti
Pevnost v tahu
Vrub< houzevn
furnace
8000C
Hardening cca. 870oC
Tempering - simple
cca, 8600C (oil) - ors. 8100C (oil's
150 - 20000 for a period of I 2 hours
Heat
Strength kg/mm2
Dimensions
Treatment
Edge Middle Edge
id 60 x 10 mm
81000 (oil)
1.43
131
1.41
j6 60 x 30 mm
8300C (oil)
131
105
127
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ATTACHMENT II
25X1A
.The seventh conference of the Technical Committee for Heat Treatment of Steel
(technickeho vyboru pro;tepelne zpracovani - TVTZ) was held on 11 July 1951
at theOzechoslovak Enterprises for the Manufacture of Automobiles, Prague X.
Krizikova Street 38, The following representatives were present:
Automobile Enterprises, National Enterprise
Ml.ada Boleslav
Auto-Praga
Moto-Jaws
Motorlet - Jinonice
Ceska Zbrojovka - Strakonice
Aero - Vysocany
Avia - Letnany
Pal - Kbely
Motorpal - Jihlava
Motor.-Union - Ceske Budejovice
Tatra - Koprivnice
Rudy Letov - Letnany
braslovka - Kolin
Draslovka .. Uhrineves
Research Institute for the Protection
of Material
United Steel Mills, National Corporation,
Czechoslovak Heavy Engineering Enterprises
Czechoslovak Enterprises for the
Manufacture of Automobiles
(fnu) Snehota
(fnu) Kopecky
Ing. (fnu) Vozenilek
Ant. -Kunc
Dr, (fnu) Bartunek
J, Pekr r
V. Komraka
(fnu) Panenka
Ing. (fnu) Mautner
(fnu) Szelke
(fnu) Schweighoffer
Prof, (fnu) Gronych
J. Sladek
Dr. (fnu) O, llrich
Ing. (fnu) Jandacek
Ing. 0. Krasny
Ing. (fnu) Knesschkk
2d, The Conference was opened by Ing,.Vozenilek4 Tests with hardening powders
(cementacni prasky-) were discussed., Vozenilek informed the members of the
conference that,the Automobile Enterprises, National Corporation,had received
from Chemapol, National Corporation, an offer of the hardening powder "Katalisator"
from the USSR, Barium carbonate cannot be imported in sufficiently large
quantities-. The powder contains approximately 16% of barium carbonate.
According to the analysis,'the product is a good hardening. powder based on
BaC03, The nature of the binder is still under- investigation. Ing0.Vozenilek
will work out a reply to the offer when the testing of the provided sample of
powder is completed. Other members of the conference pointed out that it would
be more profitable to import the basic chemicals instead of the prepared powder
itself, which would cut down on transportation. The subject of the small amount
in which this powder can be supplied was then discussed. Prof, Gronych stated
that according to what he had heard, Draslovka had purchased the patent licence
for hardening powders produced' according to the formulas of Dr. Doskar of
Svit, National Corporation, Ing.,.Mautner observed that barium clays (barnate
zeminy) are available in sufficient quantity in Czechoslovakia and the main
problem is to speed up the initiation of barium carbonate production0 The
Central Management of the Czechoslovak Enterprises for the Manufacture of
Automobiles intends to. forward a request to the Czechoslovak Chemical Enter-
prises to increase or introduce the manufacture of.barium carbonate to meet
the demand of the hardening mills .(kalirny) from domestic 'sources of raw
materials.* Ing. Krasny recommended that investigation of the possibilities
of the production of barium carbonate be prescribed and. treated as a specific
problem..
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-2-
Tatra had been entrusted with testing material CE2 and CEL.. The entire test
has been carried out, and only the size of the grain remains to be ascertained.
Powder B 8 shows an unusually strong carbonization of 1 : l02 percent on
the surface; after four hours of treatment the percentage drops to 0,20
After eight hours it is 0.4%0. The 'curves are symmetrical and the reaction
strong: after four hours (sic), 0.55%C; after twelve hours, 0.85%C, The
powder is insufficiently processed and equalized. Tatra tested the powder
after it had been used and the barium content was greater than in the ori-
ginal powder.. Powder B 8 is satisfactory on the vh.ole, but still too sharp
for chromium manganese steels.
The curves for powder B 15 after 12 hours drop to hardly acceptable values,
Tests will be?continued, however. Gronych pointed out the high cost of the
tests. Up to 600 analyses have to be made. He will therefore not continue
until funds are made available for the tests. Work on the tests will be
discontinued as long as the hardening powders furnished produce an excessive
amount of smoke, Komrska of Ceska Zbrojovka reported that his company has
completed the analyses of the powder B 8. Powder B 15 is being tested.
The resu).ts'with material TYIW were unsatisfactory; it is difficult to harden9
and after 12 hours, the carbonization is less than 0.7 percent. The qualities
of material CE2 are more favorable. In the case of powder B 8 it was ascer-
tained that in longer processes of hardening$, strong decarbonization takes
place on the surface to a depth of 0.2 mm. There was no decarbonization
in the case of powder B 150
Tests have been made with B 8 by Motorpal, at Jihlava.
After a certain length of time,.a greater depth of carbonization takes place.
.Motorpal scientists are of the opinion that the powder B 8 is sometimes more
effective than B 15, The company discontinued the tests with the furnished
sample of powder in view of the fact that the powder gave off a harmful amount-
of gas and called forth protests from the workers. There would be no sense
in carrying out tests with material of poor quality. Ceska Zbroo,ovka received
from Draslovka a normal delivery of powder marked B 15, which contained only
8 percent of BaCO30 As a result of its claim, the company received pure
barium carbonate, which was added to make a total of 15 percent. There was
no improvement in the effect, however. Instructions concerning the granu-
lation test recommend SAE Motor Oil No. 20 for moistening, Powders stored
for half a year or more lose their effectiveness.
It was agreed by the conference members that the Czechoslovak Enterprises
for the Manufacture of Automobiles would send a letter to the Czechoslovak
Chemical Enterprises and to Draslovka, to read as follows:
The firms of the Czechoslovak Enterprises for the Manufacture of Automobiles
have carried out hardening tests with the provided samples of hardening
powders B 8 and B 15. The results are unsatisfactory and unstable due to
the poorly processed mixture and the use of a smoke-releasing binder, We.
request that Draslovka send all the enterprises participating in the tests
a new'shipment of sanples of the powders B 8 and B 15, using the correct
binder,& (In foreign countries the use of motor oil SAE No, 20 is being
recommended.)
We request that Draslovka, National Corporation, establish its own hardening
mills where it could test its new hardening powders, similar to the ones
held by the firm Durferrit, or the firm Goring in Germany. In these the
enterprise could also make constant and regular checks of its products and
examine the claims of its customers, and solve thier problems as well.
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7. Dr. Bartunek stated that the situation concerning the delivery-of samples
of steel containing a lesser amount of nickel is not clear,- Moto-Jawa was
to receive 5,000 kg.of this new material for testing purposes, and will only
receive 50 kgo Ing, Vozenilek requested the representative of the United
Steel Mills, National Corporation, to investigate why the steel would not
be,delivered in the mount agreed upon, since it is known that 3.5 tons of
this,steel-had been,casto, He mentioned that an inquiry had come from the
UHZ concerning the savings made in nickel and requesting information in this
respect. In:the Plants of the Czechoslovak Enterprises for the Mahufactuire
of Automobiles savings In nickel of up to 50 percent were achieved by switching
production to other kinds.of'steelt and other savings were achieved by
changes in the construction of items of production. The result of the
savings now depends only on the foundries. The plants have so far not even
received the test rods (zkuse'bni tycky), in spite of the fact that the time
limit for the delivery of the steel has already' expired.
8. Ceska Zbrojovka has received 371k kg of NC2 steel, 25 mm thick. Analysis
revealed the following qualities:.
C 0.11 Mn 0.71;.S 0.0].5 Cr 0.96; Ni 0.69; V 0.12. Tensile strength 33.4 kg,
resistence (met pevnosti) 47 kg,. The United Steelmille representative
stated that vanadium would have to be reserved for other purposes and the
more detailed results of the use of these kinds of steel would, therefore,
not be available until later,
The Poldin'a foundry made tests with cyclic annealing (cyklicke zihani).of
Ce2 and.CE4 steel. It attained a very good degree of workability... Normali-
zation took place at a temperature of 9400; the metal was then allowed to
cool in air to a temperature of 550? and was then placed into a furnace
heated to 550? for a period of two hours. It was then left to.cnol in air.
The resistence (pevnost) was 70 kg/mm2 as compared with 50 kg/mm2 in. the
nonI ,anneal state (ve stavu'nezihanem)a In Tatra, a complex brigade (komplexni
brigada) is working on the annealing (cyklicke zihani) of CE2 material,
10, Ceska Zbrojovka has carried out the following tests with CE2 material:
Test A
I. Hardening with-pre-heating to 900? C, 30 minutes.
Tempered isothermically to AS 140 - 180?, 5 minutes, then cooled in air.
II. Tempered at 7900 C in oil.
Removal of (pnuti) 160? C, 2.5 hours
Attainment of toughness (vrubova houzevnatost): 3.61 to 3062 kg/cm2.
I. Hardened at 900? C, 30 minutes.
Tempered into oil directly from hardening bath.
II. Tempered at 790? C to AS 110, 1800 C, 5 minutes, then cooled in air.
Refraction in layers' (Vzdornost ve vrubu) was 5 to 5.56 kg/cm2.
The hardness on the surface in both cases 57 to 59 Re 150 kg.
Depth of ' hardening .approximately 003 mm.
The size of the resulting deformation has so far not been registered.
11. Ing, Vozenilek?recommended the use of isothermal tempering called "martempering"
in oil. The parts are heated in a furnace in a tempering position .(kalici
poloha) and soaked in oil baths of.200? C,. The deformation will probably
be small, and the use of alkali (kalici trny) and presses can be avoided,
Experiments in this method of tempering will be made in Auto-Praga and
Tatra, The results attained abroad are good, and the use of tempering in
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-h-
presses and (na trnech) is being. abandoned. Ing. Janacek pointed
to the. fact that the oil used-in the "martempering" process must have a high
degree of inflammability and is therefore thick, which results in great losses
.due to-the amount of oil that, clings to the material. (obrobky)_, Ing. Vdzenilek
suggested that an expert in the field of oils be invited. to attend the next
conference. of the Technical Committee for Heat Treatment of Steel in order
to provide information concerning tempering oils (kalici oleje)6 The'viscosity
at 2000 C is approximately 20 Engler. He recommended the use of a.good washer
(pracka) in the..process of tempering ,in heavy oil. Apart from'thie .a filter
and. a centrifuge should be connected to, the circulation of the, oil in
order to avoid its aging thirough oxidation elements.
12,, A prototype of. the furnace for hardening'by means of gas has-been requested.
The United Steel Mills, National Corporation, has promised to deliver casts
made. of a special heat-resisting alloy.. The brick linings (vyzdivky) have
been procuredn By December 1951.the test furnaces will have been-erected-
in Auto-Praga and Tatra. The liquids requ;red for the creation of a hardening
atmosphexee have. been developed (vyvinuty). ' BEZ is at present drawing up the
plans for au endothermal generator.for hardening gases. Ing. Mautner asked
which enterprises are'using the new hardening process called "karbonitridation".
This method gives the surface a quality which lies between "nitridation"
(nitri.dace) and ordinary-hardening. Autopal would like to replace CRK steel
by this method. Ing. Vozenilek noted that this procedure can be
carried out in the new furnaces,-of REZ and has already been used
for' 25 years in the heat treatnent of 'chain. links= in Ceska Zbrojovka -
Strakonice. Prof. Gronych requested that those interested .in.cast hardening
crucibles send-in their orders directly to the laboratory of Tatra, in order
that these may be cast within the scope of the research.,
13. In connection with the experience.of Ceska Zbrojovka with the nitridation
of the 2002 material,' the'following information was offered: the core
strength (pevnost v jadre) is approximately_55 Re. Nitrification takes
place in gas at a temperature'of 5100 C for a period of 25 to 30 hours.
Ceska Zbrojovka nitrifies tensile and other utensils on a series basis and
with good. results. Ingo Mautner,drew attention to the fact that nitrifica-
tion in gas causes the edges (ostri) to be too. fragile. and unable to resist
shocks. Nitrification in baths in combined;. in this case the edges resist shocks.
Longer tests must, ' however, be made with the tools ' according to their kinds
before the degree of success or failure can be expressed in figures. For
instance, a normal screw tap' (zavitnik) lasted about 6 hours. 'A nitrified
(ni rovar r) screw taps used on the 'same kind of work, lasted 56 hours. In
cases of exaggerated nitrification 00 minutes) the result was unfavorable
and the edges broke off. Inge.Vozenilek pointed out that,Ceska 7brojovka -
nitridates mostly small press-and cutting (rezne) instruments *f-2002 steel
for-the manufacture of chains and not tools for (brobeni triskou), with the
exception of the broach (protahovaci trn) of 2002 steel. The cutting ,
instruments'have to be'cyanided (kyanidovany) in'salt baths,,. Auto-Praga,
National Corporation,, will carry out tests in this respect and'is procuring
furnaces to this end.
14. Gronych-claimed that. Tatra is getting CLK steel instead of-CRK?steel, and
that the CLK ' steel is still marked' with the numerical index CLK I, 'CLK 2
and CLK 30' He asked ,the representative. of 'the foundries for an explanation
of. the difference. :Ing. Jandacek replied that the difference between CRK
and QLK material, lies only in the fact that the first kind is more'closely
watched during manufacture; otherwise, the composition of'both`is the same.
He does not. know anything about the additional index number 1,p 2,and 3, since
there was only one kind of this material in the foundries.
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Approved For Release 2006/03/18 : CIA-RDP82-00457RO10200240009-7
 'Approved For Release 2006/03/18 : CIA-RDP82-00457RO10200240009-7
SECRE'T'/CONTROL ,- U.S, OFFICIALS ONLY
CENTRAL INTELLIGENCE AGENCY
ATTACHMENT II
..5-
15o Ing. Vozenilek pointed out the shortage of heating wire (topne draty) for
furnaces. Heating wire had been supplied At 25X1
present it is not being manufactured by a er v d Steel
Millso He recommends asking the Ministry of Heavy Industry and the State
Planning Office who is to manufacture this wire. This action wr uld certainly
be of interest to the Czechoslovak Enterprises of Heavy Machinery and the
07,PS, Ingo Jandaoek"stated that the United Steel Mills in Chomutov are
manufacturing heating.wire of AKO material and Autoxyd e
16. Ing. Jandacek remarked that in Zbrojovka-Eisen (P50/Nlo) they have
a liquid by means of which the degrees of heat reached by cutting (vyhrati
soucasti brousenim) can be immediately ascertained, It is very useful for
control*" This control enables the use of harder kinds of discs until the
material gets heated.
25X1X 71Conment: Barium carbonate is also used for the protection of sugar-
eets and the quantities required here are also large,
T)
. /nnnsmT~Y1T Ti r VT(i TA T C n*._?3.4&
Approved For Release 2006/03/18 : CIA-RDP82-00457RO10200240009-7