No chance for corrosion
The advantages of titanium, nickel alloys and zirconium over other metallic materials are particularly evident in the construction of equipment for chemical and petrochemical processes. The chemical industry needs a wide variety of materials which protect their equipment against corrosion while at the same time keeping capital expenditure and operating costs within reasonable limits. A whole host of new chemical and petrochemical processes have been developed in recent years. With raw materials and energy sources becoming ever scarcer, but also due to increasingly tightened environmental regulations, the demands on process parameters have continuously increased. The resultant rise in operating temperatures and pressures has created process environments that can only be safely contained through the use of high-alloy materials.
ThyssenKrupp VDM's comprehensive portfolio of corrosion and high-temperature resistant high-performance materials supports optimum solutions for the challenging tasks of these new technologies. In developing such solutions that are perfectly customized to your specific application requirements, we can draw from this broad range that spans materials from commercially pure titanium and titanium alloys via zirconium to nickel alloys and high-alloy special stainless steels right through to cobalt-based alloys.
Here is a selection:
- Nicrofer 5923 hMo - alloy 59 (material no. 2.4605)
- Nicrofer 3127 hMo - alloy 31 (material no. 1.4562)
- Nicrofer 6020 hMo - alloy 625 (material no. 2.4856)
- Nicrofer 3033 - alloy 33 (material no. 1.4591)
- Nimofer 6928 - alloy B-2 (material no. 2.4617)
- Nicorros - alloy 400 (material no. 24360)
- Cunifer 30 - (material no. 2.0882)
- Nickel 99.2 - alloy 201 (material no. 2.4066)
- Nicrofer 5716 hMoW - alloy C-276 (material no. 2.4819)
These alloys are successfully used in the following chemical plants, processes and media:
- Refineries
- Phosphoric and superphosphoric acid
- Phosphate fertilizer
- Sulfuric acid
- Nitric acid
- Oxidizing media
- Acetic acid
- Reducing media
- Salt production
- Chlorine
- Caustic soda
- Vinylchloride monomer (VCM), plastics production
- Paper and pulp production
- Synthesis of organic compounds
Sheets, plates, strips, bars, billets and wires from ThyssenKrupp VDM have been giving excellent service in these and many other applications for decades.
Industrial furnace construction / High-temperature applications
The main requirements on metallic materials for high-temperature applications are high-temperature strength and resistance to high-temperature corrosion. It is true that chromium-nickel steels and also, to some extent, ferritic stainless steels generally meet these requirements at service temperatures up to 550°C. However, once temperatures exceed 850°C, high-nickel alloys should always be used, because they retain sufficient strength even, in some cases, up to 1200°C.
The excellent high-temperature strength characteristics of nickel alloys are the combined result of molybdenum, tungsten and cobalt additions (which act via the mechanism of solid-solution strengthening) and precipitation hardening with primary and secondary carbides.
Our customers’ specifications place high demands on the corrosion resistance, homogeneity, surface condition, mechanical properties and deep drawing characteristics of our materials.
ThyssenKrupp VDM produces a broad spectrum of nickel alloys which are available as semi-finished products:
- Hot strip
- Cold strip
- Sheet
- Plate
- Bar
- Rod
- Billet
- Wire
The alloys most frequently used in high-temperature applications include:
- Nicrofer 7216 H - alloy 600 H (material no. 2.4816)
- Nicrofer 6023 H - alloy 601 H (material no. 2.4851)
- Nicrofer 3220 H - alloy 800 H (material no. 1.4876)
- Nicrofer 4722 Co - alloy X (material no. 2.4665)
- Nicrofer 5520 Co - alloy 617 (material no. 2.4663)
- Nicrofer 6025 HT - alloy 602 CA (material no. 2.4633)