Sande Stahlguss GmbH
Giessereistr. 32
26452 Sande – Germany

Phone:  +49 4422 898 – 0
Fax:       +49 4422 898 – 188

Development of Cobalt Boron alloyed Cast Material

– The Frisian Contribution to Avoiding CO2 Emission –


Tests are currently being conducted in power plant construction to increase the efficiency of plants by designing plants for higher operating temperatures of up to
650 °C using new steels. The objective is to reduce CO2 emission and at the same time to improve efficiency. New, innovative materials are required to achieve this target. And the material abbreviated as ‚ “CB2” is drawing ever more attention on an international scale for constructers of power plants.


The high-temperature resistant material CB2 (GX13CrMoCoVNbNB9-2-1) is a variation of P91 steel (GX12CrMoVNbN9-1). In contrast to P91 which contains up to 9% chromium and 1% molybdenum, the CB2 material is also alloyed with cobalt and boron. Cobalt lends materials more resistance at high temperatures, while even low levels of boron also lend steel more resistance and at the same time improve machining properties.


The company, Sande Stahlguss GmbH, has gained extensive experience with this material since 2011 and is now worldwide leader in casting of energy technology in the high-alloy material GX13CrMoCoVNbNB9-2-1 for unit weights of up to 30t.


This material has been established in the materials portfolio of Sande Stahlguss GmbH which is reflected in the fact that Sande Stahlguss GmbH has supplied more than 600t (shipping weight) of cast CB2 steel for power plant applications since 2011. The range of sophisticated products supplied includes thick-walled valve bodies as well as inlet pipes, manifolds, high-pressure and medium-pressure inner casing for high-performance steam turbines.


By means of continuous development of production processes for the CB2 material, Sande Stahlguss is making a valuable contribution to the prevention of carbon dioxide emission and therefore also to a reduction of global warming.


Sande, 29th January 2014


Original article (PDF file)