Summary of Kuhn High Performance Materials
Alongside a wide range of stainless steels, we also work with a selection of nickel-based alloys in our foundry. These high performance materials are used where the highest demands are placed on the resistance to corrosion or high temperatures.
The equivalent cast alloys of these forged alloys are unfortunately only rarely standardised. The corrosion resistant nickel cast alloys have norms under the American rules and regulations. No national specifications are in place for the heat resistant nickel cast alloys. Materials are therefore either itemised in our materials list using the ASTM designation or one given internally by our company.
Our high performance materials are presented in turn below. We are at your disposal for further information or advice about your specific application.
Corrosion-resistant nickel alloys
M-35-1 [N 24135]
A nickel-copper alloy with high strength and excellent corrosion resistance against a wide variety of acidic and other corrosive conditions, particularly suited for use in reduced atmospheres. It also has good ductility and heat conductivity. The application areas include marine engineering, processing equipment in the chemical and petrochemical industries, heat exchangers, valves and pumps.
N-12MV and N-7M [N 30012 and N 30007]
These alloys are part of the group of highly corrosion resistant nickel-molybdenum alloys. The materials are characterised by very good resistance in reduced media, e.g. in hydrochloric acid at all concentrations and temperatures.
CW-2M and CX2MW [N 26455 and N 26022]
These nickel-chromium-molybdenum alloys are characterised by their excellent resistance in oxidised and reduced media, even at higher temperatures. The alloy CX2MW [N 26022] provides good resistance to wet media, e.g. sulphuric acid, phosphoric acid, nitric acid, chlorine gas, acid mixtures of sulphuric acid and oxidised acids with chloride ions. A particular characteristic of this alloy is its high resistance to crevice, hole and stress corrosion at high temperatures under oxidised and reduced conditions.
CW-6MC [N 26625]
A nickel-chromium-molybdenum alloy with niobium, which together with the molybdenum strengthens the matrix, thus ensuring a high strength without heat treatment. It is used in chemical engineering and environmental protection plants.
Heat-resistant nickel alloys
K 617
K617 is a nickel-chromium-cobalt-molybdenum alloy with an excellent combination of structural stability, strength and oxidisation resistance at high temperatures. Its resistance to oxidisation is further increased by adding aluminium. Typical applications are components for combustion chambers and pipes for petrochemical engineering, for heat treatment equipment and for the production of nitric acid.
K 718
An age-hardened nickel-chromium alloy with considerable content of iron, niobium and molybdenum combined with aluminium and titanium contents. Combines corrosion resistance and high strength with very good weldability. The alloy has very good creep strength at temperatures up to 700 °C. Used in gas turbines.
K 800 H
The substance K 800 H is a nickel-iron-chromium alloy with very good strength and exceptional resistance to oxidisation and carburisation at high temperatures. The alloy also keeps a stable, austenitic structure even under long-term exposure to high temperatures. It is used in chemical and petrochemical engineering, in power stations for super-heater and re-heater pipes, in industrial furnaces and heat treatment plants.
2.4630
2.4630 is a high-temperature nickel-chromium alloy with good mechanical properties and excellent resistance to oxidisation at high temperatures. It is used in components for gas turbines as well as furnaces and heat treatment plants.
