Special engineering steelFOR GENERAL MECHANICAL ENGINEERING, MINING AND GEAR MANUFACTURING, AS WELL AS THE OIL AND GAS INDUSTRY

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Buderus EdelstahlBuderus Edelstahl

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 pro-duction 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 coor-dinated. This saves time, makes the product handover easier and makes us flexible and reliable. The short communication paths between quality assurance, production planning, pro-duction 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 tried-and-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.

CONTENTS

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ProductionProducts

IN-HOUSE MELTINGWith 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.

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.

SHORT LEAD TIMESSpecial engineering steel from Buderus Edelstahl has a wide range of uses in gear manufacturing and rolling bearing pro-duction, 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 pro-duction. 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.

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 PRODUCTION PROCESS

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Gear steelQuality

CHEM. COMPOSITION (MASS-%)

A B C D DS

thin1.0

thick1.0

thin0.5

thick0.5

thin1.0

thick1.0

thin1.0

thick1.0

max.1.0

Designations18CrNiMo7-6 17CrNiMo6 In accordance with EN 10084 ME grade in accordance with ISO 6336 5

ZF1A

Delivered conditionHeat treatment FP-annealed QT-pre-hardened and tempered

HardnessFP-annealed: 159 – 207 HB QT-pre-hardened and tempered: 179 – 229 HB Hardening capacity HH EN 10084

Degree of purityIn accordance with DIN 50602, K 4: max. 2In accordance with ISO 4967:

All our bar steels are 100 percent tested and are delivered as standardwith a plant acceptance certificate in accordance with EN 10204 3.1.

CERTIFIED TESTINGOur 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 docu-mented 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 fracture- mechanical 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)

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

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Stock programStock program

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

6587ISO-B / High Grade18CrNiMo7-6

EN 10084

FP-annealed

Prehardened

713116MnCr5

EN 10084 FP-annealed

1191Ck-45

EN 10083 Annealed

658ISO-B34CrNiMo6

EN 10083 Annealed

695935NiCrMoV12-5

Hardened and tempered to 1,100 – 1,250 N / mm2

698121CrMoNiV4-7

Hardened and tempered

722542CrMo4

EN 10083Hardened and tempered

85131CrMoV9

EN 10085 Annealed

855034CrAlNi7

EN 10085Hardened and tempered

We use it to produce the following products at short notice: Blanks Rough-turned, drilled, sawn disks and rings With plant acceptance certificate EN 10204 3.1

WE STOCK SPECIAL ENGINEERING STEEL

Machined Machined / drilled Raw

Warehouse Wetzlar (Germany) • Phone: +49 6441 374 – 2528 or – 2587 • Fax: +49 6441 374 – 2763

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Steel gradesSteel grades

Mat. – no. EN/DIN – designation 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 cold- heading, 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 temperedMechanical 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 temperedTurbine 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 4140Suitable for hardening and tempering

Hardened and temperedMechanical 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 temperedTurbine 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

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

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

8519 31CrMoV9 EN 10085 30 CDV 9 —Nitriding steel, 750 – 850 HV – 5 after nitriding

AnnealedMechanical engineering

0.26 – 0.34 max. 0.4 0.4 – 0.7 max. 0.025 max. 0.03 2.3 – 2.7 — 0.15 – 0.25 0.1 – 0.2

8550 34CrAlNi7 EN 10085 34 CAND 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 – 1.150.15 – 0.25

Al: 0.8 – 1.2—

PROPERTIES AND APPLICATIONS

OUR SPECIAL ENGINEERING STEELS

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 com-piling 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 com-pleteness 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

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

CLOSE TO THE CUSTOMER ALL OVER THE WORLD

ISO 9001ISO 14001

ISO/TS 16949