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02 Cold rolled low carbon steel strip
Happy about details – our cold rolled low carbon steel stripJust imagine the following situation: Your colleague sitting at the desk across from you
is on the phone. You have to fetch some important documents, which unfortunately are
kept in the cabinet directly behind him. Isn’t it marvellous that filing cabinet doors can
be opened and hanging file drawers be pulled out and pushed back again almost
without making any noise at all? Your colleague will certainly appreciate it – thanks to
rolling and pull-out cabinet guides made of low carbon steel strip produced by
C.D. Wälzholz. Well, you are bound to be a really nice person, who is always interested
in the well-being of your colleagues. Keep at it! Products made of low carbon steel strip
produced by CDW will work impeccably for many years to come – even after a new
colleague has joined you in the office.
Many products using materials made by CDW cannot be detected at first glance – just
like this rolling and pull-out cabinet guide. But one thing is certain: you will realise our
quality immediately.
On the following pages we will show you what cold rolled low carbon steel strip can do
for you. We will also introduce you to a number of applications using this very special
material.
03Cold rolled low carbon steel strip
Low carbon steel strip produced by C.D. Wälzholz is used in a number of products found
in everyday life – and it certainly does a good job there, for example in the automotive
sector, in the furniture industry and in the construction of electrical cabinets.
Your requests set our benchmarks – application-oriented developmentLow carbon steel strip is extremely versatile. Due to its excellent workability and high
toughness this material allows for the manufacturing of highly accurate precision parts.
Again and again – since CDW’s quality management system guarantees controlled and
reproducible processes and consequently continuous product quality as well.
Low carbon steel strip is used, for example, to produce telescope slides in filing and
storage cabinets. These slides are exposed to loads of more than 100 kg, but they are
nevertheless smooth-running and almost noiseless as well as utterly reliable – and they
will be functioning outstandingly for many years to come.
In the furniture industry this type of steel is used to produce table legs, chair legs and
hinges. You will find it in the shape of charge eliminators in fuse boxes. Low carbon steel
strip also helps to produce the familiar sound of bicycle bells; and transformed into the
sophisticated precision blanked components called gearbox plate it supports countless
gear changes on roads and streets all over the world.
04
Perfect measurements – our standards Low carbon steel strip is characterised by utmost precision during the entire production
process. Therefore we have to try even harder to thoroughly check, measure and weigh
materials as well as co-ordinate procedures. By means of laser measuring and state-of-
the-art electronic control systems we monitor the low carbon steel strip during each
production step ensuring optimal settings for all tolerances. Consequently we are able
to guarantee the most outstanding quality for each individual precision component and
worked part.
Our quality and process management system monitors and controls the entire
production process – pre-roll reduction, heat treatment and then finally skin passing.
This is how we can provide optimal pre-conditions for overall constant properties and
thus for effective subsequent processing.
Thickness 0.08 - 14 mm
Width 7 - 650 mm
Tolerance according to EN 10140 and special agreements
Delivery form pancake coils, oscillated wound coils and fixed lengths
Material according to EN 10139 and special grades
“non-earing” condition on request
Surface condition according to EN 10139, special agreements and surface coated
Cold rolled low carbon steel strip
for further details: www.cdw.de
05
EN 10139 Ladle analysis [% max.] Delivery condition Mechanical properties
Steel type C P S Mn Ti Condition Short symbol Re
[N/mm2]
Rm
[N/mm2]
Elongation r 90
min.
n 90
min.
HV
A80 A50 Lo = 5.65 So
DC 01 0.12 0.045 0.045 0.60 annealed A 270 - 390 28 30 32 max. 105
slightly skin-passed LC max. 280 270 - 410 28 30 32 max. 115
cold worked C290 200 - 380 290 - 430 18 20 24 95 - 125
C340 min. 250 340 - 490 105 - 155
C390 min. 310 390 - 540 117 - 172
C440 min. 360 440 - 590 135 - 185
C490 min. 420 490 - 640 155 - 200
C590 min. 520 590 - 740 185 - 225
C690 min. 630 min. 690 min. 215
DC 03 0.10 0.035 0.035 0.45 annealed A 270 - 370 34 36 37 max. 100
slightly skin-passed LC max. 240 270 - 370 34 36 37 1.3 max. 110
cold worked C290 210 - 355 290 - 390 22 24 26 95 - 117
C340 min. 240 340 - 440 105 - 130
C390 min. 330 390 - 490 117 - 155
C440 min. 380 440 - 540 135 - 172
C490 min. 440 490 - 590 155 - 185
C590 min. 540 min. 590 min. 185
DC 04 0.08 0.030 0.030 0.40 annealed A 270 - 350 38 40 40 max. 95
slightly skin-passed LC max. 210 270 - 350 38 40 40 1.6 0.180 max. 105
cold worked C290 220 - 325 290 - 390 24 26 28 95 - 117
C340 min. 240 340 - 440 105 - 130
C390 min. 350 390 - 490 117 - 155
C440 min. 400 440 - 540 135 - 172
C490 min. 460 490 - 590 155 - 185
C590 min. 560 590 - 690 185 - 215
DC 05 0.06 0.025 0.025 0.35 slightly skin-passed LC max. 180 270 - 330 40 42 42 1.9 0.200 max. 100
DC 06 0.02 0.020 0.020 0.25 0.30 slightly skin-passed LC max. 180 270 - 350 38 40 40 1.8 0.220
Cold rolled low carbon steel strip
for further details: www.cdw.de
Achieving perfection through precisionLow carbon steel strip produced by C.D. Wälzholz
is the result of long experience combined with
state-of-the-art computer technology – perfecting
our process technology and optimising quality
assurance.
Low carbon steel strip is always the first choice
when it comes to precision parts and worked
steel components. This material meets even the
highest requirements as to working and forming
properties. It is also extremely tough and can be
exposed to high loads. In order to achieve these
properties our steel strip is produced in a highly
sophisticated process. CDW has 4-stand tandem
rolling mills, where strip thicknesses are recorded
by means of non-contact x-ray and isotope
measuring devices whilst strip length and speed
data is collected by means of laser beams.
Consequently even the slightest deviation can be
corrected immediately and the appropriate
adjustments are made at once. Subsequently the
steel is annealed in HICON batch-type annealing
furnaces conjointly developed by Ebner, the
manufacturer, and CDW. With these special batch
furnaces, which play a crucial role within the
coordinated heat treatment processes of cold rolled
low carbon steel strip, spheroidise annealing with
temperatures of up to 850 °C is possible.
Furthermore, CDW has several continuous
annealing lines extending the heat treatment
range to 1,050 °C.
06 Cold rolled low carbon steel strip
In this way properties like e. g. flatness are realised,
and application-oriented adjustments to produce
isotropic grades, for example, are thus made
possible.
CDW also specialises in low carbon steel strip
surface treatment. With the so-called “single sided
plates” surfaces are created independently, i. e. the
different surface roughness and thus the different
adhesive properties of the sides are flexibly aligned
with envisaged applications. The combination of
smooth and rough surfaces will therefore ensure
a perfect match between material properties and
end product requirements.
Subsequent processes, after the actual production
of low carbon steel strip at CDW, may include
separation processes like die cutting or fine
blanking as well as various working and forming
procedures: by means of deep drawing, stretch-
forming, bending and stamping, precision parts
and worked steel components of above-average
dimension accuracy can now be manufactured.
For us at C.D. Wälzholz precision is more than just
a word – it is our philosophy and it enables you to
achieve perfection!
07
Nominal thickness
[mm]
Thickness tolerances for nominal widths [mm]
< 125 125 < 6001)
> A B C A B C
- 0.10 ± 0.008 ± 0.006 ± 0.004 ± 0.010 ± 0.008 ± 0.005
0.10 0.15 ± 0.010 ± 0.008 ± 0.005 ± 0.015 ± 0.012 ± 0.010
0.15 0.25 ± 0.015 ± 0.012 ± 0.008 ± 0.020 ± 0.015 ± 0.010
0.25 0.40 ± 0.020 ± 0.015 ± 0.010 ± 0.025 ± 0.020 ± 0.012
0.40 0.60 ± 0.025 ± 0.020 ± 0.012 ± 0.030 ± 0.025 ± 0.015
0.60 1.00 ± 0.030 ± 0.025 ± 0.015 ± 0.035 ± 0.030 ± 0.020
1.00 1.50 ± 0.035 ± 0.030 ± 0.020 ± 0.040 ± 0.035 ± 0.025
1.50 2.50 ± 0.045 ± 0.035 ± 0.025 ± 0.050 ± 0.040 ± 0.030
2.50 4.00 ± 0.050 ± 0.040 ± 0.030 ± 0.060 ± 0.050 ± 0.035
4.00 6.00 ± 0.060 ± 0.050 ± 0.035 ± 0.070 ± 0.055 ± 0.040
6.00 8.00 ± 0.075 ± 0.060 ± 0.040 ± 0.085 ± 0.065 ± 0.045
8.00 10.00 ± 0.090 ± 0.070 ± 0.045 ± 0.100 ± 0.075 ± 0.050
CDW thickness ranges exceeding EN 10140; nominal widths on request
> A B C
10.0 12.0 ± 0.110 ± 0.090 ± 0.055
12.0 14.0 ± 0.120 ± 0.100 ± 0.060
A = Normal tolerance B = Fine tolerance C = Precision tolerance 1) Nominal width possible for low carbon steel strip up to 650 mm.
Cold rolled low carbon steel strip
Patented innovationsC.D. Wälzholz is well known for its consequent
application-oriented approach. One example for
this philosophy is our production of material for
flux cored welding wire for off-shore technology.
In this area of low carbon steel strip production
we have managed to optimise chemical ingredients
in order to avoid spraying during welding work.
Our low carbon steel strip has to undergo exacting
tests like e. g. the notch impact test. Therefore we
are able to guarantee the necessary ductility of
the cored wire even at low temperatures.
But that is not everything. In order to be able to
meet even the most demanding requirements
CDW has developed LIN rolling, a patented
procedure for surface treatment. LIN denotes
“liquid nitrogen” and refers to the liquid nitrogen,
which replaces common coolants like oil or
emulsions during the rolling process.
Thanks to this process innovation our strip steel
for flux cored welding wire is characterised by
particularly even surfaces and a complete absence
of oil. For the user this means no more smoke
emissions and the highest possible safety level.
08 Cold rolled low carbon steel strip
09
Economic miracle – our oscillated wound coilsApart from developing high-quality materials one of our main objectives has always been
process optimisation. Together with our customers we constantly aim at making
production processes more efficient. One good example for co-operation and continuous
enhancement is the development of our strictly application-oriented oscillated wound coils.
For the production of our cold rolled low carbon steel strip coils we have managed to
increase the length of the individual steel strips from 1,000 to 30,000 metres. Moreover,
steel strips can be joined by means of modern welding technology. A further advantage
is our computer-controlled oscillating winding procedure. Thanks to our state-of-the-art
technology our customers have crucial advantages since operating times are up to
30 times longer now, and you all know what that means: labour-intensive set-up times
and unprofitable shutdown times are minimised.
Here they are again in short form – the advantages of our oscillated wound high carbon steel strip coils:» Strip widths of up to 70 mm
» Strip length/operating times 30 times longer
» Individual coil widths of 250 mm - 550 mm
» Jumbo coils with a weight of up to 3,500 kg
Cold rolled low carbon steel strip
10
For us at C.D. Wälzholz it is important that our
cold rolled low carbon steel strip reaches your
company in perfect condition. Therefore we aim
for the highest quality and exacting standards not
only in regards to production and material, but
also with respect to packaging. Our modern
automatic packaging equipment can guarantee
smooth logistics between production line and
shipping department and will ensure that the low
carbon steel strip will reach its destination in
perfect condition.
We have developed suitable and appropriate
packaging for different means of transportation
and for national or international destinations.
Have a nice journey!Take our heavy-duty overseas packaging, for
example, which will have to withstand the strains
of long and rough transportation across the ocean.
Protection of all our products is extremely
important to us, but we will never use more
packaging material than absolutely necessary.
After all, this is for the benefit of the environment
and of our customers.
Due to our long international experience we have
continuously improved our coil packaging: apart
from optimal protection and clear marking we will
always make sure that distinct traceability is
guaranteed.
Cold rolled low carbon steel strip
11
C.D. Wälzholz – at home everywhere in the worldSteel is an extremely versatile material. The C.D. Wälzholz Group of Companies is just
as versatile itself. As a progressive German cold rolling mill with a long tradition,
C.D. Wälzholz today has subsidiaries and agencies all over the world. Therefore we are
in a position to offer our international customers cold rolled low carbon steel strip in
virtually any type and grade required – everywhere in the world.
Satisfied customers, highest quality as well as a responsible handling of the environment
are our goal. Always.
Cold rolled low carbon steel strip
Cold rolled high carbon steel strip
Hardened and tempered steel strip
Electrical steel strip
Cold rolled low carbon steel strip
Bonderized steel strip
Narrow steel strip
Profiles
C.D. Wälzholz KGFeldmühlenstr. 55 58093 HagenGermany
Phone: +49 (0) 23 31- 9 64 - 0Fax: +49 (0) 23 31- 9 64 - 21 00Internet: www.cdw.deE-mail: [email protected]
Locations: Hagen, Hohenlimburg, Plettenberg, Oberkochen, Iserlohn/Germany Götzis/Austria . Thiers/France São Paulo/Brazil . Cleveland, Ohio/USA . Taicang/China
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