Cold rolled high carbon steel strip - Waelzholz · PDF fileCold rolled high carbon steel strip...

Cold rolled high carbon steel strip

Of course it fits – because it’s made with our high carbon steel stripHave a seat! Don’t worry about safe and optimal legroom. Your car seat will easily adjust

to any leg length. In every position it guarantees utmost safety. Why? Because the seat

slide is made from steel strip produced by CDW. Not only does this seat slide allow for

flexible seat positions, but it is also lightweight as well as enormously solid, and it is able

to withstand even the strongest leverage. The slide functions every day in an unobtrusive

and reliable manner – in all kinds of vehicles all over the world.

Many of our customers’ products using materials made by C.D. Wälzholz cannot be

detected at first glance – just like this car seat slide. But one thing is certain: you will

realise our quality immediately.

High carbon steel strip is used in many other motor vehicle components as well as in

basic everyday commodities such as secateurs and saw blades – as case-hardening

steel, spring steel, or as micro-alloyed fine-grained steel.

On the following pages we will introduce our whole range of high carbon steel strip

grades, and we will also show you how to find the best solution to meet your particular

requirements.

Cold rolled high carbon steel strip02


High carbon steel strip made by CDW fits perfectly into everyday life. Whenever you are

sitting in your car driving somewhere, you are relying on this versatile material. But cold rolled

high carbon steel shows its potential in a number of other areas as well: e. g. secateurs with

blades made of high carbon steel strip are particularly robust and sharp!

Versatile and flexible – just like your productsIn co-operation with your company we will develop the optimal solution for all your

products. We can supply soft, alloyed and unalloyed carbon steel grades with excellent

workability as well as high-strength materials, which are ductile, homogeneous and

inherently stable at the same time. All our steel grades meet the exacting requirements as

to mechanical and technological properties, metallurgical purity and perfect microstructure.

We constantly support the development process on the basis of our quality management

system. Consequently we are not only able to guarantee controlled and reproducible

procedures, but also a continuous product quality – reliable, of course, as well as exactly

according to your own ideas.

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High-strength materials – in every respect High carbon steel strip produced by C.D. Wälzholz represents high quality and long

durability. In order to ensure that our products always come up to such an excellent

standard, each individual material used within the carbon steel strip range has to meet

particularly stringent requirements right from the start.

Micro-alloyed fine-grained steel grades guarantee excellent end products. Particularly

above-average working properties and in regards to ductility and flow properties they

have facilitate controlled and manageable production processes. Consequently this

means for you that you can at all times be certain to obtain quality products.

Such reliability is convincing – particularly in the automotive industry. In this industrial

sector it is of vital importance to provide not only continuity as to all possible tolerances,

but being also infinitely reproducible.

Thickness 0.08 - 14 mm

Width 7 - 650 mm

Tolerances according to EN 10140 and special agreements

Delivery form pancake coils, oscillated wound coils and fixed lengths

Material according to EN 10268 and special grades RAWAEL®

Surface condition according to EN 10139, special agreements and surface coated

04

for further details: www.cdw.de

Therefore micro-alloyed fine-grained steel grades

are used e. g. in gearbox plates since flatness and

breaking strength are of utmost importance for

this end product.

CDW also offers the perfect solution for the

manufacturing of seat slides. We have developed

our special RAWAEL® steel strip grade for these

specific applications.

This high-strength material is strictly

specification-oriented, with enormous tensile

strength as well as excellent workability. And at

the same time it is so lightweight allowing for

end product weight reductions of up to 50 %.

Seat slides made with CDW steel strip are able

to absorb extreme stresses and will therefore

contribute considerably towards passenger

safety in case of an accident.

0 5 10 15 20 25 30

1,300

1,200

1,100

1,000

900

800

700

600

500

400

300

200

Tensile strength

Rm [N/mm2 ]

RAWAEL® grades

Conventional production

Name Mechanical propertiesRAWAEL® Rp0.2 min.

[N/mm2]Rm

[N/mm2]A80

[%]

RAWAEL 70 600 650 - 800 12

RAWAEL 80 700 750 - 900 10

RAWAEL 90 800 850 - 1,000 8

RAWAEL 110 1,000 1,050 - 1,200 5

Elongation A [%]

RAW

AEL

110

RAW

AEL

90

RAW

AEL

70RAW

AEL

80

Accuracy in detail – case-hardening steel The group of high carbon steel strip materials comprises a number of different types

of steel with numerous qualities. Consequently there is an exceedingly wide range of

applications.

Within this group case-hardening steel is noted

for its exact performance. Highest accuracy even

in case of closest thickness and width tolerances,

unmatched wear resistance and breaking

strength withstanding even extremely strong

fatigue stress are the crucial characteristics of

this material. This ensures reliable quality and

long durability wherever this type of steel is used.

Since its working properties are controllable

case-hardening steel will always be the first

choice whenever precision is required. The

automotive industry really appreciates this.

During the vehicle manufacturing process it relies

on materials made by CDW and uses it frequently

and in numerous components. Take the finger

follower in the valve control of combustion

engines, for example, which is made of case-

hardening steel-making sure that the engine

always runs smoothly. Another example is the

impulse ring, which is an important element in the

antilock brake system. Case-hardening steel

made by CDW – this is what we call tailor-made.

06 Cold rolled high carbon steel strip

EN 10132-2 Ladle analysis (Percent by weight) Delivery condition Mechanical properties

Steel type C Si Mn P S Cr max. Rp0.2 Rm min. A80 HV

[N/mm2] [N/mm2] [%]

C10E 0.07 - 0.13 max. 0.40 0.30 - 0.60 max. 0.035 max. 0.035 max. 0.40 +A / +LC 345 430 26 135

+CR 830 250

C15E 0.12 - 0.18 max. 0.40 0.30 - 0.60 max. 0.035 max. 0.035 max. 0.40 +A / +LC 360 450 25 140

+CR 870 260

16MnCr5 0.14 - 0.19 max. 0.40 1.00 - 1.30 max. 0.035 max. 0.035 0.80 - 1.10 +A / +LC 420 550 21 170

+CR

17Cr3 0.14 - 0.20 max. 0.40 0.60 - 0.90 max. 0.035 max. 0.035 0.70 - 1.00 +A / +LC 420 550 21 170

+CR


Width 7 - 650 mm



Material according to EN 10132-2 and special grades

“non-earing” condition on request


Cold rolled high carbon steel strip 07


Peak performance at all times – hardening and tempering steel

Good secateurs have to withstand a lot of strain.

They will cut anything, from a tiny sprout to

a thick branch. These continuously changing

stresses and strains are no problem for sturdy

secateurs with excellent cutting stability, a vital

property, which is achieved during the production

process by means of extra hardening and

tempering as well as special surface treatment.

Consequently secateurs made of hardening and

tempering steel produced by CDW will not only

cut things neatly, they will also do so for a very

long time.

The above-average firmness of hardening and

tempering steel produced by CDW makes this

product highly attractive to a number of industrial

sectors.

In the automotive industry, for example, our steel

is used to produce seat belt tongues. As you can

imagine, breaking strength, high durability as well

as wear resistance are indispensable for such

a product. The remarkable hardening of belt

tongues is achieved by adding various elements,

e. g. chromium. Thus we are able to guarantee

a lasting quality and reliability of our products.

Reliability, breaking strength and exact

workmanship with all tolerances – this is what

our hardening and tempering steel is all about.

You can certainly rely on that!

Hardening and tempering steel is an all-rounder – secateurs made of this type of steel

help to tidy up public parks, and the seat belt tongue made of the same material helps

to protect motorists in case of accidents. Hardening and tempering steel is extremely firm

and robust – a crucial head start for you and your products.



Steel type C Si Mn P S Cr Mo Ni max. Rp0.2 Rm min. A80 HV

[N/mm2] [N/mm2] [%]

C22E min. 0.17 0.40 +A or +LC 400 max. 500 22 max. 155

+CR max. 900 max. 265

max. 0.24 0.40 0.70 0.035 0.035 0.40 0.10 0.40 +QT


+CR max. 920 max. 270

max. 0.34 0.40 0.80 0.035 0.035 0.40 0.10 0.40 +QT


+CR max. 930 max. 275

max. 0.39 0.40 0.80 0.035 0.035 0.40 0.10 0.40 +QT


+CR max. 970 max. 280

max. 0.44 0.40 0.80 0.035 0.035 0.40 0.10 0.40 +QT


+CR max. 1,020 max. 290

max. 0.50 0.40 0.80 0.035 0.035 0.40 0.10 0.40 +QT


+CR max. 1,050 max. 295

max. 0.55 0.40 0.90 0.035 0.035 0.40 0.10 0.40 +QT 1,050 - 1,650 325 - 505


+CR max. 1,070 max. 300

max. 0.60 0.40 0.90 0.035 0.035 0.40 0.10 0.40 +QT 1,100 - 1,700 340 - 520


+CR max. 1,100 max. 305

max. 0.65 0.40 0.90 0.035 0.035 0.40 0.10 0.40 +QT 1,150 - 1,750 345 - 530

25Mn4 min. 0.23 0.95 +A or +LC 460 max. 590 20 max. 180

+CR

max. 0.28 0.40 1.15 0.035 0.035 0.40 0.10 0.40 +QT

25CrMo4 min. 0.22 0.60 0.90 0.15 +A or +LC 440 max. 580 19 max. 175

+CR

max. 0.29 0.40 0.90 0.035 0.035 1.20 0.30 +QT 990 - 1,400 305 - 435


+CR

max. 0.37 0.40 0.90 0.035 0.035 1.20 0.30 +QT 1,020 - 1,500 315 - 465


+CR

max. 0.45 0.40 0.90 0.035 0.035 1.20 0.30 +QT 1,100 - 1,600 340 - 490


Width 7 - 650 mm





Surface condition according to EN 10139, special agreements and surface coatedfor further details: www.cdw.de


Well connected – Spring steelYou know that when you are driving a car you do

a lot of things automatically – you press the

clutch and change gears without even thinking

about it. You probably didn’t know, however, that

one device is crucial for the smooth procedure of

these operations – the diaphragm spring made of

spring steel. This spring works as a coupling

element in the drivetrain, it ensures smooth

transitions as well as smooth and controlled

clutch travel.

As far as toughness is concerned spring steel is

second to none. Durability and form stability are

well above-average, and it guarantees

continuously excellent quality for any final product.

Spring steel obtains its characteristic properties

in a special treatment procedure during the

production process. In a number of different

production steps the steel is rolled and annealed

several times, and it is carefully hardened and

tempered. Various wide strip and narrow strip

lines are used for this procedure, which is

additionally supported by our quality and process

management system. Consequently we are able

to guarantee the highest performance and optimal

quality for your products!


Width 7 - 650 mm






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Steel type C Si Mn P S Cr Mo V Ni max. Rp0.2 Rm min. A80 HV

[N/mm2] [N/mm2] [%]

C55S min. 0.52 0.15 0.60 +A or +LC 480 max. 600 17 max. 185

+CR max. 1,070 max. 300

max. 0.60 0.35 0.90 0.025 0.025 0.40 0.10 0.40 +QT 1,100 - 1,700 340 - 520


+CR max. 1,100 max. 305

max. 0.65 0.35 0.90 0.025 0.025 0.40 0.10 0.40 +QT 1,150 - 1,750 345 - 530


+CR max. 1,140 max. 315

max. 0.73 0.35 0.90 0.025 0.025 0.40 0.10 0.40 +QT 1,200 - 1,900 370 - 580


+CR max. 1,170 max. 320

max. 0.80 0.35 0.90 0.025 0.025 0.40 0.10 0.40 +QT 1,200 - 1,900 370 - 580


+CR max. 1,190 max. 325

max. 0.90 0.35 0.70 0.025 0.025 0.40 0.10 0.40 +QT 1,200 - 2,000 370 - 600


+CR max. 1,200 max. 325

max. 0.95 0.35 0.70 0.025 0.025 0.40 0.10 0.40 +QT 1,200 - 2,100 370 - 600


+CR max. 1,200 max. 325

max. 1.05 0.35 0.60 0.025 0.025 0.40 0.10 0.40 +QT 1,200 - 2,100 370 - 630


+CR max. 1,200 max. 325

max. 1.30 0.35 0.60 0.025 0.025 0.40 0.10 0.40 +QT 1,200 - 2,100 370 - 630

48Si7 min. 0.45 1.60 0.50 +A or +LC 580 max. 720 13 max. 225

+CR

max. 0.52 2.00 0.80 0.025 0.025 0.40 0.10 0.40 +QT 1,200 - 1,700 370 - 520

56Si7 min. 0.52 1.60 0.60 +A or +LC 600 max. 740 12 max. 230

+CR

max. 0.60 2.00 0.90 0.025 0.025 0.40 0.10 0.40 +QT 1,200 - 1,700 370 - 520

51CrV4 min. 0.47 0.70 0.90 0.10 +A or +LC 550 max. 700 13 max. 220

+CR

max. 0.55 0.40 1.10 0.025 0.025 1.20 0.10 0.25 0.40 +QT 1,200 - 1,800 370 - 550

80CrV2 min. 0.75 0.15 0.30 0.40 0.15 +A or +LC 580 max. 720 12 max. 225

+CR

max. 0.85 0.35 0.50 0.025 0.025 0.60 0.10 0.25 0.40 +QT 1,200 - 1,800 370 - 550

75Ni8 min. 0.72 0.15 0.30 1.80 +A or +LC 540 max. 680 13 max. 210

+CR

max. 0.78 0.35 0.50 0.025 0.025 0.15 0.10 2.10 +QT 1,200 - 1,800 370 - 550

125Cr2 min. 1.20 0.15 0.25 0.40 +A or +LC 590 max. 750 11 max. 235

+CR

max. 1.30 0.35 0.40 0.025 0.025 0.60 0.10 0.40 +QT 1,300 - 2,100 405 - 630

102Cr6 min. 0.95 0.15 0.20 1.35 +A or +LC 590 max. 750 11 max. 235

+CR

max. 1.10 0.35 0.40 0.025 0.025 1.60 0.10 0.40 +QT 1,300 - 2,100 405 - 630



Sophisticated – process technology with guaranteed qualityHigh carbon steel strip produced by C.D. Wälzholz is the result of sophisticated

process technology specialising in cold rolling and heat treatment. CDW has 4-stand

tandem rolling mills and 20-roll mills, which are able to reach speeds of up to 850

metres a minute.

Sophisticated measuring methods and state-of-the-art electronic control systems help

to achieve even the closest tolerances. By means of non-contact x-ray and isotope

measuring strip thicknesses are recorded so that roll positions can be automatically

adjusted to set the required tolerances. Additionally strip length and speed data is

collected by means of laser beams.

Heat treatment of high carbon steel strip is crucial for the material properties. CDW

uses HICON batch-type annealing furnaces, which were conjointly developed with

Ebner, the manufacturer. With these special batch furnaces spheroidise annealing

with temperatures of up to 850 °C is possible.

We optimize the economies of the production processes of our customers in every

detail: Besides the most modern process technology for homogeneous material

properties we adjust all processes to handle very large coils. These coils have an

outside diameter of up to 1.850 mm helping our customers to achieve an even more

economical production.

Outward appearance – our products are worth protectingFor us at C.D. Wälzholz it is important that our

high carbon steel strip coils reach your company

in perfect condition. Therefore we aim for the

highest quality not only in production but also

in packaging. Our modern automatic packaging

equipment can guarantee smooth logistics

between production line and shipping department.

Every type of transport is different. Bearing this in

mind, we have developed suitable and appropriate

packaging for all national and international

destinations. Take our heavy-duty overseas

packaging, for example. It will most definitely

withstand the strains of long and rough

transportation across the ocean. We will, however,

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 packaging: optimal

protection, clear marking and distinct traceability

are the results of such an extensive experience.

13Cold rolled high carbon steel strip


Enhanced windingApart from developing high-quality materials one of our main objectives has always

been process optimisation. Together with our customers we constantly aim at enhancing

production processes. One good example is the continuous further development of our

oscillated wound coils.

These coils help our customers to stay ahead of competitors as far as the production

process is concerned. For example, we have managed to increase the length of the

individual steel strips from 1,000 to 30,000 metres. Moreover, steel strips can now

be joined by means of modern welding technology. A further advantage is our

computer-controlled oscillating winding procedure. And, consequently, operating times

are 30 times longer now and this 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 and 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 high carbon steel strip 15

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 high 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.


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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