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Material Number	Material Name	Material Number (single)	Standard	Scope	Standard Status	Country	Successor	VDA 231-106 classification	Application temperature [°C]
2.4660 (DIN 17744 : 2002-09)	NiCr20CuMo	2.4660	DIN 17744 : 2002-09	DIN 17744 : 2002-09 replaced by DIN 17744 : 2020-12	Replaced	Germany	NiCr20CuMo	3.4	≤ 500	1)
1) Remark: The material NiCr20CuMo with the material number 2.4660 is applied in the form of strips, sheets, tubes, bars, wires and forgings for corrosion-resistant construction components. The alloy has an excellent resistance to corrosion in sulphuric, phosphoric and organic acids as well as in aqueous solutions of their salts. The resistance to nitric acid is good as well. As a result of the tailored chemical composition, the alloy also shows excellent resistance to intercrystalline corrosion and stress cracking corrosion. The molybdenum content ensures good resistance to pitting and crevice corrosion. NiCr20CuMo is applied in a wide range at temperatures of up to about 500 °C. Typical fields of application are e.g. plants for the production of sulphuric acid as well as processes that are based on sulphuric acid, such as, among others, extraction columns in the amino acid production and for the production of drugs, plants for the production of synthetic man-made materials and for the production of food as well as heat exchangers in refineries and for the production of phosphoric and hydrofluoric acid. Processing properties: Formability: good Weldability: satisfactory

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Semi-finished Product	Condition	Strength Abbrevation	Nominal Size [mm]	Temperature [°C]	Specimen Direction	Tensile Strength [MPa]	Yield Strength (0.2% offset) [MPa]	Yield Strength (1.0% offset) [MPa]	Elongation A [%]	Reduction of Area [%]	Hardness HB \| HBW
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Temperature [°C]	Melting Temperature [°C]	Density [g/cm³]	Young's Modulus [GPa]	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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Procedure	Welding and Joining - Evaluation	Interpass Temperature [°C]	Added Materials	Information
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Tradename	Supplier
2.4660	SCHMOLZ + BICKENBACH GUSS GmbH, Krefeld
2.4660	Rolf Kind GmbH, Gummersbach
2.4660	Sprint Metal Edelstahlziehereien GmbH, Hemer
2.4660	INTERSTAHL Service GmbH, Wetter
2.4660	Rosswag GmbH, Pfinztal-Kleinsteinbach
2.4660	Imet Industriemetall Handelsgesellschaft mbH, Hamburg
A 35 MKN	Otto Junker GmbH, Edelstahlgießerei, Simmerath
AL 20	ATI Flat Rolled Products GmbH, Remscheid
Alloy 020	ROPA STAHLVERTRIEB GMBH, Bad Bergzabern
Alloy 20 C B 3	Enpar Sonderwerkstoffe GmbH, Gummersbach
Alloy 20 entspr.	Chr. Höver & Sohn GmbH & Co KG, Lindlar
Coralloy 20	Chr. Höver & Sohn GmbH & Co. KG, Lindlar
DMV 920	Salzgitter Mannesmann Stainless Tubes GmbH, Mülheim an der Ruhr
INCOLOY alloy 020	Special Metals Deutschland Ltd., Düsseldorf
Nickelvac 16-25-6	ATI Europe, Düsseldorf
NiCr20CuMo	Hoesch Hohenlimburg GmbH, Hagen
NiCr20CuMo	pauly STAHLHANDEL, Essen
Nicrofer 3620 Nb-alloy 20	VDM Metals GmbH, Werdohl
NY 920	AUBERT & DUVAL Deutschland GmbH, München
PHYWELD 920SLR	Ugitech SA, Ugine
TECHALLOY 80 20	TPS-Technitube Röhrenwerke GmbH, Daun
Werkstoff 20	ZAPP AG, Ratingen

Material Standard Values