HIGH GRADE HOT-ROLLED SPRING STEEL

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80T00246A004800280005-4
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 15
• Document Creation Date: December 21, 2016
• Sequence Number: 5
• Content Type: REPORT

Approved For Release 2008/04/21 : CIA-RDP80T00246AO04800280005-4
STAT
%SK3toJULNOJI: t1NJEDINENIJE
-PROM SYRIOIMPORT"
Pig iron and ferro-alloys; semis such as ingots, blooms, slabs
and billets; joists and channels, merchant bars and structural
shapes, high quality and special steels, stainless, acid and heat
resisting steels; steel plates and sheets of various grades and
for various uses; cast iron and steel pipes, steel cylinders for
gas; railway materials; miscellaneous iron and steel products
such as bolts, nuts, rivets, chains and nails, welding wires and
electrodes; steel strips and wires for various uses; steel ropes;
bimetals and electrical resistance alloys.
Post address: 32. Smolenskaja pl.. Moscow -G 200
'Phone G-4.19.03
Gables: Syrioimport Moscow
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 Approved For Release 2008/04/21 : CIA-RDP80T00246AO04800280005-4
INTRODUCTION
Spring steels are intended for manufacturing flat springs and coiled springs.
The springs fliat or coiled are used for even distribution of moving mechanism weight between the
axles of railroad cars, automobiles, etc., and for cushioning of shocks resulting from the wheels bumps
against rough roads.
The springs should withstand the load acting upon them, without producing permanent deformation
and possess sufficient elasticity. As to the types, the springs are classified as coiled (spiral) and flat
springs, The flat springs consist of a pack of steel leaves placed one upon another, and gradually
shortening to the point of the highest bending moment of the spring. In the middle of the pack, the
leaves are fastened between themselves by a strain bolt or a clip. The cramps or clips are used to
prevent any side displacement of the spring leaves.
The springs are made of different types of high grade or extra high grade steels. delivered according
to the USSR standards t n tCT 2052-53 or ['01 T 4555.48.
HIGH GRADE HOT-ROLLED SPRING STEEL
The coiled or flat springs are manufactured of high grade carbon and alloy steels, made by either
open-hearth or electric furnace processes. These steels are delivered in hot-rolled unannealed state,
according to the USSR Standard l o(.T 2052-53. The chemical compositions of the steels are given in
Table 1.
The residual copper content in spring steel shall not exceed 0.25 per cent.
At the purchaser's request the spring steel may be furnished with narrower limits of carbon content.
i. e., up to 0.05 per cent, and with lower sulphur and phosphorus content than that indicated in Table 1.
The spring steel may also be furnished in the annealed state.
It is guaranteed that the surface of steel rolled product, when examined by the naked eye shall be
free of cracks, scales, laps, gas cavities, bubbles, sand inclusions, hair cracks and laminations. Local
defects can be removed by chipping or grinding, with dimensions of steel profiles at points of cleaning
being within the limits established by the corresponding standards or technical specifications for
minimum dimensions.
When examined by the naked eye, the macrostructure of spring steel in fractures and etched
transverse templets shall be free from signs of piping, voids, cracks, bubbles and slag inclusions.
Unannealed steel intended for cold mechanical working in the state of delivery, possesses the
following hardness (see Table 2).
1 r . 1 1 . 1 1 1
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Group of Steel
Grade
of
Steel Carbon Manganese
Silicon
11,1,11 -11,74) 11,n11 11,$I)
0,1; o.37
Carbon Steel
511
3;
1; 11
0
;11 11.65 0.:10 0,
,
,
i
r ., 0,;5- 0K0 11,:01 -11,511
0,17 0,3;
11,52 - 01!411 0,:01--0,511
11,1; 0.37
Manganese Steel
6v[ o,IIo- 0,70 0.90 1 .,20
11,',0 0.(0) 11,611 0.19)
11,1;-0.37
0,511 -U.S41
' 0,4, 0.55 0,60 0.911
fill C'
1.:01- '5410
_
II,:iS 0,60 11,60-0,191
?,00
6002 0. /7-0,65 0410---0,:10
1.54' 2,041
60C?A I-,:1f'i -11,444 0.4'0) 0.90
1,60 ?5,00
7ot'3A 11,66 41,;4 0.611- 0,90
5.40 2.`40
63 t'--'A 0,141 I1,, 5 oho 090
1,40 2.50
:,:-, I' o.:,0-0.60
0,140- 1.00
1.30 1,140
1',0('1'
0.go- 1.00
1.311- 1,511
r,o l'rA 0,511 - 0.6{
0,50 -- 1.04)
1,:30 1.1;4)
Chrome -Manganese Steel 1
10\I'
41,46-0..`14
0,46-0,54
o.-, 1) -- 1.00
0.50 1,00
0.37
0.3;
Chrome.Silicon Steel
0.17 0.:3;
Chrome-Vanadium Steel
Chrome-Manganese'
Vanadium Steel
Chrome-Silicon-
Vanadium Steel
Nickel
up to 0,:41 up to 11,:;11
up to 0.:111 up to 0.141
UP to 0,:41 up to 0.311
0:41
up to 0.311 up to
up to 0.311 up to o.:01
up go 0:30 up to 41.441
ttp to 0.a41 up to 10.440
0
(n
,
UP to 11,30 up to
up to 0,341 up to 11.44,
up to 0,:41 up to 0.441
up too.30 up to 0.441
UP to 0,:41 up to 41.441
up to 0,:30
UP to 0,:41
up to 0.:41
090-1.50
0.( . 1.20
up to 0,40
up to 0.40
up to 0.441
up to 0,40
up to 41,411
SWOur
I
rai~+
n4-4:~ 1~ 4040/
u4r4:~
04-Lr u 14400
u4r4:. 4i 4000
Up4$ U!-401
04045 4040401
404000 a 404/0
1- 4000 -~ 0600
404450 04/440
014040 a,al,
u4C30-
u 4KPI 404. 0
040440
04600
o.404
0041440
I 0.4x.414
40,000
046411
0440;40
40.000
144040
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1,:10 2.00
 Approved For Release 2008/04/21 : CIA-RDP80T00246AO04800280005-4
Gro&
of
Stee)
lliawoter
Diameter
llriaell
Hrinall
of
Grade ol?
lied""
llardnesa
(lapneeiua
of Impression
HI
ill,
aut
Steel MOM
maximum
maximum
mom
i minimum
ill1C2
IIIIC'1 A
C3A
-,nXl'
X l'A
Jo X4bA
63 C2 A
4i0 t'2 XJ1.%
1i:,1''2 ItA
:w1 rC
:d1C'2
:w) C'S
611 C1'
60C1'A
I;OC'2XA
:,11 X IVA
When the annealed steel is ordered the hardness is stipulated by special technical specifications.
The following physical properties are guaranteed for the heat treated specimens of spring steel
subjected to a tensile test at tension (see Table 3).
Heat Treatment (approximately) I Physical Properties
Grade
Yield Tensile
Reduction
of
Hardening
Quenching
Tem
pering
Point
Stren
th
of
Steel
Temperature
Medium
Tem
perature
g
Area
per cent
lay
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sit
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1 e I ? ti ti 1 :
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 Approved For Release 2008/04/21 : CIA-RDP80T00246AO04800280005-4
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The results of determining the reduction of area on the flat tension specimens are for information
only (facultative).
The spring steels are delivered with guaranteed limits of decarburization zone.
For thickness of flats or diameter of bars in millimeters (diameter or distance between parallel sides
of squares) the depth of the decarburization zone shall not exceed the following limits:
a) for flats and bars of all grades of steel, excluding silicon alloy steel:
up to 8 mm inclusive ..... 2 per cent of the thickness of flats or bars
over 8 mm ........... 1,5 per cent of the thickness of flats or bars
h) for flats and bars of steel grades alloyed with silicon:
up to 8 mm inclusive ..... 2,5 per cent of the thickness of flats or barb
over 8 mm ........... 2,0 per cent of the thickness of flats or bars
Hardness, physical properties and depth of decarburization for steels of grades 55 Cr, 60 C and
60 Cr.% are given for information only (facultative).
The grain size for steel grade 50 Xl*.% is guaranteed to be within numbers 5-8 according to the
USSR Standard 1))CT 5639-51.
At the purchaser's request steel of all grades is subjected to bend tests. The requirements and limits
of these bend teats are stipulated in technical specifications.
The spring steels are furnished in the following shapes: rounds - from 5 to 50 mm inclusive, and
squares from 6 to 50 mm inclusive.
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 Approved For Release 2008/04/21 : CIA-RDP80T00246AO04800280005-4
Ii- tiakming t)?lw$ of flat spring steel are manufactured:
1Npe A: Hat spring steel ot? rectangular cross-r+,ection (with slightly blunt corners) is furnished in
?.nh Isom jtt to Ibt- mm inclusive and in thickness from 4 to IH mm inclusive.
I% w It: Hat spring steel with rounded edges (Fig. II.
The cn,as-wr?lional dimensions of type It flats available for delivers are as f llows (Table t):
3. Rectangular spring steel (Fig. 2).
The cross-sectional dimensions of rectangular spring steel and permissible variations see -fable i.
TABLE 5
24)
14
,~
l:,
35
16
40
IS
?I. Flat spring steel type A (Fig. ?)I?
1n 0,4 ir,
l.t n?r n?:.
I- n
n.,
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 Approved For Release 2008/04/21 : CIA-RDP80T00246AO04800280005-4
i'hr rn.....rrlnmal ,bn.cn?nnl? ..I ILII . ,
l tilt;; stt,t,l i.ct, 'I'u1111? tl~.
MiIih
of 161.
40
:1
:t
:..
:t?:,
' I
!1
111
i
1111
l0
11
12
f.Y
if
I I
12
li,
~
111
11
4...
;
ill
I
:1
4
;.:,
111
I I
12
14
.
!1
10
I
'
I
I!
14
I
-
,
~ ,.
.1
I11
11
~
14
li.:,
~ ~
111
!1
111
1 I I
12
1 {
tN 1
_
III
1"
,
7
7.
1
111
1.2
It,,
Jill)
I1)
I I
1'
1
1
It,
!?
'
I I
I.'
I {
I1;
12
I l
I1;
140
In
11
12
I {
I?;
1:,0
I,.
I I
1'
I I
I?;
:,
I??
I I
I _'
I l
I?;
The permissible variations in tvi.Ith an.I Ihicknl?.- .11' -l,ring -t..?l Ii:u. -ball ,??Ilh,rrll Iabl.
The class of precision of strt,l rolling distil I..? -til.ttlalt,.l in Ill- l.ur. h:l?.?r order.
The f.ermissible camber of .prin.. -t.?.?I flat- pt,r I linear :1.?1.?: ~I:I II not . v r,?il for limits indica-
ted in Table 8.
The finned curvature is allm,ted .,nl\ I.. 1,11,? -i.h ;firm.' tilt. I.?nrtll ..f ii . Ilal
The fares of fiats shall he planw and iii iluaII parallel. 'I'll. not allowed.
The ronravit,, of Mane surfarr of Ilat, made .1n cin-timi.?r1?nlial :u-.? -li:ill ii i ? ,,',,I 11.2 mm for 'ach
-nrlace of flats. 'Ilu? centres of .?onra: it: radii fir on the Illnn tr'~ a~i- ..t Ibt, ln..lile.
The concavity cif plane .urfac.? of flat i- d.?I.?rnlined b\ ntea-uri_ of a map I.. tl~..vt tb1 roller applit,d
r.t flit, flat and Ihr middle of flat.:sith a clearmire r;ilt_'. ?r ;t -.... al .':nl .?.
The radius of the edge rounding rd' a flat .hall n.,I e\..eed tll.? thicl,n.?.. of the flat.
'I'i:. flat .print, steel can be d'liver??d in -pt,ritled It?nwth- or Inultipl,? Irn-rh- ::ith pt,rmi-.ililt- varia-
tion- + f11 mm,
i. ~prin~ flat st.,I. T\111. It I Fig. I).
I'll'. dinlt,n.iom of - pring steel flat, are indicated in "fable 4).
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Width
Flat Profiles
I Permissible-\'aria-
tiona in width, mm
Permissible Variations Thickness
Normal I High Normal High Normal Iligh
Normal 1 MA Precision Precision Precision precision I Precision recision
o-lo
up to 511 mm inclusive 0. u,l:, 41,111 11,211 11.1:j 412:1 n,l:, 11.10. .141.
from 50 u. Illl) mm to- 11,1 11, U. 11.141 i 11,24) 11.1.1 i 0? ~:, 11.1:, 0.111 11? to
precision Precision Thickness Thickness from 7,5 I hirknres up to fnxn 7,5 .?r
up to 7,5 mm to 12 nom inclusive over 12 mm 7.5 mm to 12 mm 12 mm
Thickness
of
Flat Profiles
up to 7,5 10101 Edge .-amber
inclu,ive
11? '0 , 11. I :, 1 n,":. 11, I :. I 11,:11 11,'11
Permissible Camber
per I linear meter
Normal precision High precision
of rolling of rolling
Alhrwdde di lrrrner is thi4ars.
of edges in u*e croarsreti.o
of Hu profile iwasimum!.
Thickness of Aso:
r,:; Iu
7,; 1412 71; 102 1:1 I::n In
7,; 111 II-I I:D1 1-'
1:.41 7
7r 1:1 ! 14 141
~:1 l 0 1'!41 12 I :d1 1.1
124, 1:: 1:.41 1''
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l4rllll.i+lhl? varlalllin+:
hir width . . . .. . . . ... . . . . . . . . . . 1.5 lwr cow
for star up Iii III -rmm int?I... . . . . . . . . . 11.25 nom
,fur sia? up to 12 and 13 rosin . . . . . . .. . . 0.35 mill
The diH'eren.w in tha4knrs. in one cross?slti?tiun (in the direction of decreasing the thickness from
the e4P- to the middle of the profile) shall not e'un111 0.2 rim. provided that Iltirkuess tolerance is
stri.Ih nlaintajne,l.
h. The ybrin flat out a%r +trrl (Fig. 3).
7. The spring flat parabolical steel.
Uinwnsions of Mats and permissible variations in thickness and width shall he in conformity with
Table 111 Wig. to.
Thickness
Permissible Variations in Thickness
of
Flats
n,ll
11
II,I:1
11.1:
l l
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*l'he Permissible camber of flat profiles per I linear meter shall not exceed the values indicated in
Table 1t.
& Ong swel of grooved profile. Type A. Wig. 7).
The dinensiuas of spring steel grooved profiles are indicated in Table 11. mm:
fdt- Tess r A
I mi.imum
K,
r,
maximum
6
lu
i it
4,5
3.7100
a.75
e{3
1:;
it
4.
3,75
8,75
7.;
I 1
4
3.5
/
2, 1 :1
16
I 1~'
1
4..1
1.1./
8, 5
76
11
:1
4,
3,75
:1,75
74;
I3
5
4
75
3
3
75
.
.
,
w
to
4,5
:t.75
3,75
1:1
5
:1
4
:
3
:1
75
.
1
.1
,
I.NI
1:.
5
5
4
1
75
7:
3
.
.
1
,
110
1:1
5
5
4
:1
75
1
7
,
,
:
,
5
I'D1
I''
?1
4.5
t-75
3,7:1
13
5
4.:1
t,75
3,75
Permissible variations:
for dimensions b
... ......... .... ._
1,5 per cent
for dimensions s up to 11 rum ........ . _
0,25 mm
for dimensions s 12 and 13 mm ....... ..
0,35 mm
for dimensions K ................ + 0,6 mm
for dimensions A ...... ........... - 0.5 .m
The difference in thickness in one cross-section (in the direction of decreasing the thickness from
the edges to the middle of profile) shall not exceed 0.2 mm provided that the thickness tolerances are
strictly maintained.
The displacement of the are centre of cavity and the arc centre of protrusion of the flat profile
from the line of symmetry shall not exceed 0.5 mm.
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1). Spring .keel of groo%e.I profiles. 'f%pr It.
The dimensions of spring steel grooved profiles shall correspond to 'f'able 12. mm.
'I ABLE 12
n
7
1?
l'hr ribbed camber of flat profiks shall not a .erd 2 mm per I linear meter and camber o,orr the
flat plane shall not be over :i mm per linear meter.
The bars and flat pn.filr?. are furnished in random lengths in the range from 2 to to m and in
.?l.rt?ifird awl multiply lengths stipulated in the purchaarr's order.
? hen the flat proliks are tWi%ered in s.erifie.) and multiple lengths. the hdlnring length %ariati.M?
-hall be allowe.l:
for length. up to I m . . . . . . . . . . . . . . . . . ? 111 mm
fur length. .-%rr I m .. . . . . . . .. . .. . . INr Most
The spring steel ia .lelirrred in I.A. r.Maistrng 44 Nat i rubles and lmr? .4 the same gra.le .4 4erl.
of .Mr brat. one .rte and ?4 one and the same twat trralmwM.
fhr .k.egnatNM .f spring steel in the lwrrhaarr'o, order is mole rsth tndNcatt.wr erf dsmwmora? .4 fear.
an.f flat f.rr4sk?. lrret?isir.n ?4 rollersg and gra.le of steel.
I? lot prohly. and leers of spring steel unwkr :WI mm in thsrltmr?? ter dtaeme"le r are fwrwahrd to buwlir?..
ears "Ole .ro urriv tired with at least two instal sleek. The refight s4 resit boob shall n.A rit.'er.l
5111 Ag R Irn Lading and wml.whng I. mtet4eaniartl. the weight of the bundle. rot hr greater.
'Iwo mortal tales are, alta.lr.l to each kindle t4 steel. r.Mlarning the hdl..wswg tnhrrwat"bit grad.
,4 .feel. cork nwmirr and dsmrn?n.ws of flat pruhlr? awl her. of spring stel
fIr r.Nl face6 of .fwsng steel fmr?.>rt .111 mm in thk nr.. or dtassnyr?t shall 1w .tamped rph rwr-trsg
ln.1ra4 .4 stamp the Writ not for mar" with a rode mutwl.rt rhea sh..wb1 hr .h..wlrrl in tint
-0p14rr ? . rrlth''atr
V. hen none thin now kA .4 steel to shipped its crew freight at, the LAs .hall for .. prrac.1 I.t j.0 'T.
i.?-o drhtrrr.f LA .4 spring steel to Il..wmsfe