1. science
2. engineering

Special engineering steel
FOR GENERAL MECHANICAL ENGINEERING, MINING AND GEAR
MANUFACTURING, AS WELL AS THE OIL AND GAS INDUSTRY
Buderus Edelstahl
Buderus Edelstahl
CONTENTS
Buderus Edelstahl
2
Products
4
Production
5
Quality
6
Gear steel
7
Stock program
8
Steel grades
10
SPECIAL ENGINEERING STEELS
WITH UNIQUE STRENGTHS
BUDERUS EDELSTAHL — QUALITY FROM A SINGLE SOURCE:
The entire production process, from melting through to production of the end product, takes place at the Wetzlar site. This
also applies for our high-quality special engineering steels. We
melt the initial material from high-quality scrap steel in our
own steel plant and forge the ingots in the open die forging
process on our hydraulic presses with a compression force of
up to 100 MN. The heat treatment and quality check also take
place directly on-site. All production steps are precisely coordinated. This saves time, makes the product handover easier
and makes us flexible and reliable. The short communication
paths between quality assurance, production planning, production and sales enable smooth order processing.
The expectations of our customers have the highest priority
at every stage. As a competent partner, we are available for
all application queries and work with our customers to find
suitable solutions for specific requirements. We produce triedand-tested standard products, as well as individual steels, which
we develop according to the specifications of our customers.
Small batch sizes are no problem for us. The success of Buderus
Edelstahl is based on a high level of flexibility, reliability and
service, as well as on a transparent materials management
and quality assurance system.
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3
Products
Production
SHORT LEAD TIMES
Special engineering steel from Buderus Edelstahl has a wide
range of uses in gear manufacturing and rolling bearing production, mining, in the oil and gas industry, in the energy sector,
as well as in other general areas of mechanical engineering.
Our customers value the reliability of our case hardening and
tempered steels in particular — especially in difficult conditions
such as those encountered in the field of large gear unit production. With the case hardening steel 18CrNiMo7-6, for example,
we offer a high-purity steel, which is the ideal choice for gear
wheels and gear parts. Our nickel alloy steels with a nickel content
of up to three percent can withstand the highest strains in drill
heads and pump housings.
Our concept for large gear unit production is based on forging
complete bars instead of single forgings. This not only optimizes
production costs, but also increases quality at the same time.
We deliver bars in standard production lengths or fixed lengths,
as well as disks sawn off the bar with a diameter of up to
1,550 mm. We can also fulfill customer requests at short notice:
We stock the most common special engineering steel grades
and dimensions in our store — in either raw forged, rough turned
and/or rough turned and pre-drilled state.
IN-HOUSE MELTING
With a furnace capacity of 100 to, Buderus Edelstahl melts its
raw materials in its own electric steel plant. For this, we use
high-quality scrap steel from the recycling cycles in Germany
and Europe. After tapping, the steel is deoxidized and degassed
in the secondary metallurgy process (LF-VD/VOD plant) and
either deep desulphurized or set to a controlled sulphur content
depending on the requirements. We bottom-cast the special
steel in moulds with hot top insulation to ingots weighing between
2.8 and 190 to.
The benefits of our special engineering steel:
excellent micro- and macroscopic degree of purity
low level of trace elements
low segregation
narrow tolerance limits
Our open die forging plant is equipped with high-performance
presses with forces of 20 MN, 55 MN and 80/ 100 MN. Here, we
forge ingots up to an operating weight of 190 to. The subsequent
heat treatment takes place in shuttle kilns or continuous kilns.
Our deep hole drilling bench can achieve holes up to 13 m deep.
On the lathes, we process weights of up to 120 to, diameters
up to 2,100 mm and lengths of up to 17 m. Our wide range of saws
enable us to cut through bars up to a diameter range of
2,000 x 2,000 mm.
OUR PRODUCTION PROCESS
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5
Quality
Gear steel
CERTIFIED TESTING
Our own melting plant, state-of-the-art ladle metallurgy, casting
of ingots and process-controlled production steps guarantee
the high quality standard of the special engineering steel from
Buderus Edelstahl. And we also monitor the quality of the special
engineering steel meticulously. Our quality assurance system
specifies all quality-relevant process steps and inspection points
in detail. Each production step is checked precisely and documented clearly — from the melting of the steel through to the
forming processes and delivery. The integrated management
system at Buderus Edelstahl GmbH is certified in accordance
with ISO 9001, ISO/ TS 16949 and ISO 14001.
In addition to the traditional material tests, such as tensile tests,
hardness tests, structure and purity level tests in accordance
with national and international standards, we also check fracturemechanical parameters (e. g. KIC), carry out impact tests
according to Brugger and conduct tests with the scanning
electron microscope and EDX/WDX analyses in our testing
laboratory. The testing laboratory is certified by “Deutsche
Akkreditierungsstelle GmbH (DAkkS)” in accordance with
DIN EN ISO/IEC 17025.
The sawn plates of the gear steel 18CrNiMo7-6 achieve the
highest purity levels thanks to our quasi-isotropic material
properties and comply with the DNV High Grade quality. This
has been certified by “Det Norske Veritas”. The outstanding
quality of this steel has also been certified by “Germanischer
Lloyd”.
GEAR STEEL 1.6587 (ISO-B / DNV HIGH GRADE)
CHEM. COMPOSITION (MASS-%)
C
Si
W
P
S
Cr
Ni
Mo
O
0.15 – 0.19
max. 0.4
0.5 – 0.6
max. 0.025
max. 0.005
1.5 – 1.8
1.4 – 1.7
0.25 – 0.35
max. 0.0025
Designations
18CrNiMo7-6
17CrNiMo6
In accordance with EN 10084
ME grade in accordance with ISO 6336 5
ZF1A
Delivered condition
Heat treatment
FP-annealed
QT-pre-hardened and tempered
Hardness
FP-annealed: 159 – 207 HB
QT-pre-hardened and tempered: 179 – 229 HB
Hardening capacity HH EN 10084
Degree of purity
In accordance with DIN 50602, K 4: max. 2
In accordance with ISO 4967:
A
thin
1.0
B
thick
1.0
thin
0.5
C
thick
0.5
thin
1.0
D
thick
1.0
thin
1.0
DS
thick
1.0
max.
1.0
All our bar steels are 100 percent tested and are delivered as standard
with a plant acceptance certificate in accordance with EN 10204 3.1.
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Stock program
Stock program
WE STOCK SPECIAL ENGINEERING STEEL
We use it to produce the following products at short notice:
B lanks
Rough-turned, drilled, sawn disks and rings
With plant acceptance certificate EN 10204 3.1
Steel grade
Regulation Heat treatment
condition
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
360
370
380
390
400
420
430
440
450
460
480
500
525
530
550
575
600
625
640
650
660
670
700
725
750
800
850
900
950
1,000 1,050 1,150
1,250 1,350 1,450 1,550 1,650
FP-annealed
6587
ISO-B / High Grade EN 10084
18CrNiMo7-6
Prehardened
7131
16MnCr5
EN 10084
FP-annealed
1191
Ck-45
EN 10083
Annealed
658
ISO-B
34CrNiMo6
EN 10083
Annealed
6959
35NiCrMoV12-5
Hardened and
tempered to
1,100 – 1,250 N / mm2
6981
21CrMoNiV4-7
Hardened and
tempered
7225
42CrMo4
EN 10083
Hardened and
tempered
851
31CrMoV9
EN 10085
Annealed
8550
34CrAlNi7
EN 10085
Hardened and
tempered
Warehouse Wetzlar (Germany) • Phone: +49 6441 374 – 2528 or – 2587 • Fax: +49 6441 374 – 2763
8
Machined
Machined / drilled
Raw
9
Steel grades
Steel grades
OUR SPECIAL ENGINEERING STEELS
PROPERTIES AND APPLICATIONS
Mat. – no.
Regulation
AFNOR
AISI
Material properties
Delivered condition
Applications
Composition (Mass-%)
C
Si
Mn
P
S
Cr
Ni
Mo
V
6587
18CrNiMo7-6
EN 10084
18 CND 6
—
Usable, suitable for coldheading, good hardening
capacity
FP-annealed, prehardened
Gears
0.15 – 0.21
max. 0.4
0.5 – 0.9
max. 0.025
max. 0.035
1.5 – 1.8
1.4 – 1.7
0.25 – 0.35
—
7131
16MnCr5
EN 10084
16 MC 5
—
Usable, suitable for
cold-heading
FP-annealed
Gears
0.14 – 0.19
max. 0.4
1.0 – 1.3
max. 0.025
max. 0.035
0.8 – 1.1
—
—
—
6580
30CrNiMo8
EN 10083
30 CND 8
—
Suitable for hardening and
tempering
Hardened and tempered
Mechanical
engineering
0.26 – 0.33
max. 0.4
0.3 – 06
max. 0.025
max. 0.035
1.8 – 2.2
1.8 – 2.2
0.30 – 0.50
—
6582
34CrNiMo6
EN 10083
34 CND 6
—
Suitable for hardening and
tempering
Annealed / hardened and
tempered
Mechanical
engineering
0.3 – 0.38
max. 0.4
0.5 – 0.7
max. 0.025
max. 0.035
1.4 – 1.7
1.4 – 1.7
0.15 – 0.3
—
6959
35NiCrMoV12-5
—
—
—
Suitable for hardening and
tempering
Hardened and tempered
to 1,100 – 1,250 MPa
Mechanical
engineering
0.3 – 0.4
0.15 – 0.35
0.4 – 0.7
max. 0.015
max. 0.015
1.0 – 1.4
2.5 – 3.5
0.35 – 0.6
0.08 – 0.2
6981
21CrMoNiV4-7
—
—
—
Heat resistant
Hardened and tempered
Turbine shafts / screws
0.17 – 0.25
0.15 – 0.35
0.35 – 0.85
max. 0.03
max. 0.035
0.9 – 1.2
0.2 – 0.8
0.65 – 0.8
0.25 – 0.35
7225
42CrMo4
EN 10083
40 CD 4
4140
Suitable for hardening and
tempering
Hardened and tempered
Mechanical
engineering
0.38 – 0.45
max. 0.4
0.6 – 0.8
max. 0.035
max. 0.035
0.9 – 1.2
—
0.15 – 0.30
—
7709
21CrMoV5-7
EN 10269
—
—
Heat resistant
Hardened and tempered
Turbine shafts / screws
0.17 – 0.25
max. 0.4
0.4 – 0.8
max. 0.025
max. 0.03
1.2 – 1.5
—
0.55 – 0.8
0.25 – 0.35
Hardened and tempered
to 900 – 1,050 MPa
Extrusion tools
0.11 – 0.17
max. 0.25
0.8 – 1.0
max. 0.02
max. 0.015
1.25 – 1.5
—
0.8 – 1.0
0.20 – 0.30
0.15 – 0.25
0.1 – 0.2
7735
14CrMoV6-9
—
20 CDV 5 7
—
Nitriding steel with good
toughness properties
and thermal strength,
weldable, high degree of
purity, 750 – 900 HV – 5
after nitriding
8519
31CrMoV9
EN 10085
30 CDV 9
—
Nitriding steel,
750 – 850 HV – 5 after
nitriding
Annealed
Mechanical
engineering
0.26 – 0.34
max. 0.4
0.4 – 0.7
max. 0.025
max. 0.03
2.3 – 2.7
—
—
Aluminium-alloy nitriding
steel, surface hardness
900 – 1,150 HV – 5 after
nitriding
Hardened and tempered
Extrusion tools
0.3 – 0.37
max. 0.4
0.4 – 0.7
max. 0.025
max. 0.03
1.5 – 1.8
0.85 – 1.15
8550
10
EN/DIN – designation
34CrAlNi7
EN 10085
34 CAND 7
0.15 – 0.25
Al: 0.8 – 1.2
—
11
CLOSE TO THE CUSTOMER ALL OVER THE WORLD
Buderus Edelstahl GmbH is a renowned German manufacturer of high-grade special steels.
Both our standard steels and our special steels have an excellent reputation all over the world.
With more than 50 sites, service centres and product warehouses, we guarantee close
cooperation and quick reaction times for our customers.
Special steels from Buderus Edelstahl are used in vehicle and drive technology, plant and machine
construction, as well as tool and mould production. We deliver quality products from a single
source for these high-tech sectors:
Tool steel
Special engineering steel
Open die forgings
Drop forged components
Hot and cold-rolled strips
Semi-finished products
Hardness comparison plates
ISO 9001
ISO 14001
ISO/TS 16949
Buderus Edelstahl GmbH
Björn Rech
Buderusstraße 25
35576 Wetzlar
Germany
Phone: +49 6441 374 - 0
Fax:
+49 6441 374 - 2882
E-mail: engineering-steel@buderus-steel.com
Legal notice:
Buderus Edelstahl GmbH has taken the greatest care in compiling this information. It is nevertheless possible that details
may have changed in the meantime. Please appreciate that
we are therefore unable to guarantee the accuracy and completeness of the information provided. We reserve the right
to make changes to the content at any time. Please also note
that we accept no liability for obvious printing errors and
mistakes. All details, information and descriptions are
non-binding and only become binding as part of a contract to
be concluded separately.
©
Buderus Edelstahl GmbH, Wetzlar, 04/2015