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CoCr26Ni9Mo5W | 2.4681 Material Datasheet

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Material Description

Material Number Material Name Material Number (single) Standard Standard Status Country VDA 231-106 classification
2.4681 (Stahl-Eisen-Liste : 1999) CoCr26Ni9Mo5W 2.4681 Stahl-Eisen-Liste : 1999 Replaced Germany 4.2 1)
1) Remark: The material CoCr26Ni9Mo5W (ULTIMET alloy, UNS R 31233) with the material number 2.4681 (not contained any more in the DIN-Normenheft 4, 1992) is a cobalt-chromium wrought alloy. It combines the properties of HASTELLOY (corrosion alloys) with those of STELLITE (wearing alloys). ULTIMET alloy possesses an unusual resistance against galling, cavitation corrosion, droplet impact and various forms of corrosion attacks. It also possesses a high tensile strength, which is comparable to many corrosion-resistant Duplex-steels, combined with a very high impact strength and ductility. The alloy is an ideal welding material with an unusual ductility and resistance against weld cracking. CoCr26Ni9Mo5W is applied for agitators, mixers, bolts, moulds, extrusion plants, turbine guide blades, casting plungers for the glass industry, nozzles, pumps, rolls, conveying worms as well as for valve components.

Chemical Composition

C [%] Cr [%] Fe [%] Mn [%] Mo [%] N [%] Ni [%] Si [%] W [%] Remainder
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Material Compliance

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Mechanical Properties

Semi-finished Product Condition Nominal Size [mm] Temperature [°C] Tensile Strength [MPa] Yield Strength (0.2% offset) [MPa] Elongation A [%]
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Physical Properties

Temperature [°C] Melting Temperature [°C] Density [g/cm³] Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] Thermal Conductivity [W/(m*K)] Specific Electrical Resistance [µΩm] Mean Specific Heat Capacity [kJ/(kg*K)]
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Producer/Supplier/Trade names

Tradename Supplier
CoCr26Ni9Mo5W Chr. Höver & Sohn GmbH & Co KG, Lindlar
CoCr26Ni9Mo5W ZAPP AG, Ratingen

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