Login to SMS group Connect

Got a registration code?

Please enter your eight-digit registration code.

Converter steelmaking (Stainless Steel)

Shaping the future – converter steelworks from SMS group

Since the early 1950s, SMS group and its predecessor companies have been using their know-how for highly productive and modern converter steelplants for carbon and stainless steel worldwide.
SMS group is one of the leading companies in this market and meets the growing demands of its customers with advanced and reliable mechatronic systems. In cooperation with universities and institutes, eco-friendly and economical solutions are developed that are used worldwide. The product range is wider than ever. This includes complex BOF and AOD converter steelplants with a high degree of automation and digitalization, as well as new paths in the metallurgical process and modernizations. Our solutions are durable and sustainably reduce maintenance costs. 
Spare parts, modernizations, tailor-made maintenance procedures or customized training programs: Our Technical Service is ready around the world to offer you service packages geared to your requirements along the entire metallurgical process chain.

The key features are
High productivity and product quality
Latest process technologies and superior products
Project solutions with a fast return-on-investment


SMSgroup Image SMSgroup Image SMSgroup Image SMSgroup Image

Future-oriented stainless steelmaking

What's special about our process lines is that we tailor your plant to your conditions. Included in these considerations are availability of raw materials, infrastructure, and energy supply.

The upshot is that you can produce high-quality materials at low cost.

SMSgroup Image SMSgroup Image SMSgroup Image SMSgroup Image

Efficient, custom-engineered vacuum converters

We specially develop vacuum converters for producing stainless, acid-resistant, and heat-resistant steel grades as well as highly alloyed special steels, manganese, and chromium alloys, plus medium and low-carbon ferromanganese and ferrochrome.

SMSgroup Image SMSgroup Image SMSgroup Image SMSgroup Image

AOD converter

The AOD converter is key equipment in the stainless steelmaking process. An argon-oxygen mixture is being injected into the molten steel through sidewall-nozzles which provokes a very efficient carbon removal.


SMSgroup Image SMSgroup Image SMSgroup Image SMSgroup Image

Scientific studies and practical experience prove that the shape of the AOD vessel has a significant impact on the AOD process. SMS group was a leading force in researching the optimum height-to-diameter (h/d) ratio of the AOD melt and now designs vessels accordingly.


  • Vessel shape is slightly deeper than for classical AOD conver-ters with an h/d ratio of ~0.7
  • Safe and low-maintenance but powerful and economic converters due to proper vessel design
  • Outstanding converter performance in combination with the hydraulic torque retainer


  • Minimum chromium oxidation and therefore high Cr yield
  • Optimum slag dissolution
  • Better cleanliness of final product
  • Ideal mixing energy
  • Best refractory performance
SMSgroup Image SMSgroup Image SMSgroup Image SMSgroup Image

The converter vessel is held in the trunnion ring by three clamping elements. Vessel pins, which are welded to the vessel shell, are mounted in support brackets attached to the trunnion ring.


  • Automated system
  • Allows thermal expansion of the vessel in the trunnion ring
  • Mechanically secured against unintentional opening


  • Quick converter exchange with an exchange time ≤ 30min
  • Higher safety standard for operators

Selected References

Electrical and automation systems

Insitu gas measurement with X-Pact® Sense

Maintenance free and fast process gas measurement (CO & CO2 / O2)

More information

Ladle identification with X-Pact® Sense

Full automatic infrared all-in-one ladle recognition system

More information

Leakage detection with X-Pact® Sense

Water leakages detection for Submerged arc furnaces

More information

X-Pact® Auto Tapping

Better process with automatic tapping

More information

X-Pact® Gas Cleaning Assist

Energy-efficient automation for dedusting plants

More information

X-Pact® Ladle Management

Integrated and automated ladle management

More information

X-Pact® LIMS

Comprehensive management of sampling and analysis results

More information

X-Pact® Process Optimizer (AOD)

For AOD converter - Process assistance systems for the complete process line

More information

Digital twin

Digital counterpart of a customer-specific plant

More information

Plug & Work

3D real-time simulation of technology prior to installation

More information

Product quality analyzer (PQA®)

Solution for smooth process flow and constant high quality

More information

Remote service

Always at your side, quickly and dependably, worldwide

More information

Upgrade Package Basic Automation

New state of the art hardware, latest development software

More information


Safeguarding plant lifetime

More information

X-Pact® Business Intelligence

Systematic analysis of data in an electronic form

More information

X-Pact® Drive

Low voltage frequency converter as integral part of X-Pact®

More information

X-Pact® MES 4.0

Production planning and scheduling for all production units in the plant

More information

X-Pact® Process Condition Analyzer (PCA)

The "transparent" plant

More information

X-Pact® Process Guidance

New standard for the future automatic control of complex plants

More information

X-Pact® Sense

Intelligent sensor system and camera-based solutions

More information

X-Pact® Vision Operation and Visualization

Innovative HMI and new control station

More information


Drive Systems

More reliability in the drive train due to Drive Systems provided by SMS group.

More information


Digital documentation: First step to a smart plant.

More information

Emergency support - Remote Service

For easy identification of defects and malfunctions and quick initiation of measures for fault elimination.

More information

Equipment check

Regular inspections and maintenance form the basis for safeguarding the efficiency of your equipment.

More information

Safety Locator

Protect your most valuable asset - your employees - with the SMS group Safety Locator!

More information

Smart Maintenance

Digitalize your maintenance with SMS group!

More information



SMSgroup Bader, Jan

Jan Bader

SMS group GmbH
General Manager Technical Sales Steelmaking
Eduard-Schloemann-Straße 4
40237 Düsseldorf

Phone : +49 211 881 6638
Fax : +49 211 881 776638

SMSgroup Gerike, Uwe

Uwe Gerike

SMS group GmbH
Project Management Steelmaking
Eduard-Schloemann-Straße 4
40237 Düsseldorf

Phone : +49 211 881 5856
Fax : +49 211 881 775856

SMSgroup Linden, Wolfgang

Wolfgang Linden

SMS group GmbH
Head of Electrics/Automation Steelmaking and Environmental Technology
Eduard-Schloemann-Straße 4
40237 Düsseldorf

Phone : +49 211 881 6779
Fax : +49 211 881 77 6779