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NiCr21Mo | 2.4858 Material Datasheet

Material Test Series Values
Material Standard Values

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Material Description

Material Number	Material Name	Material Number (single)	Standard	Scope	Standard Status	Country	Predecessor	VDA 231-106 classification	Application temperature [°C]
2.4858 (VdTÜV WB 432-1 : 2022-06)	NiCr21Mo	2.4858	VdTÜV WB 432-1 : 2022-06	Supersedes VdTÜV WB 432-1 : 2021-02	Valid	Germany	NiCr21Mo	3.4	-10 - 450	1)
1) Remark: High corrosion resistant Ni base alloy for pressure vessels according to AD 2000 data sheet W2, for pressure equipment according to directive 2014/68/EU and for nuclear engineering. The material is resistant to intergranular corrosion in the welded condition (EN ISO 3651-2, procedure A). The maximum corrosion rate in the Huey test according to ASTM A262 (practice C) is 0.6 mm/year in the as-delivered condition.

Chemical Composition

Al [%]	C [%]	Cr [%]	Cu [%]	Mn [%]	Mo [%]	Ni [%]	P [%]	S [%]	Si [%]	Ti [%]	Remainder
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Material Compliance

REACh	RoHS
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Mechanical Properties

Semi-finished Product	Condition	Nominal Size [mm]	Temperature [°C]	Specimen Direction	Tensile Strength [MPa]	Yield Strength (0.2% offset) [MPa]	Yield Strength (1.0% offset) [MPa]	Elongation A [%]	Elongation A80 [%]
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Physical Properties

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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Toughness Data (Impact)

Semi-finished Product	Condition	Nominal Size [mm]	Temperature [°C]	Specimen Shape	Specimen Direction	Notch Impact Energy [J]	Notch Bar Impact Strength [J/cm²]
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Welding and Joining

Procedure	Welding and Joining - Evaluation	Holding Temperature [°C]	Added Materials
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Heat Treatment

Heat Treatment	Nominal Size [mm]	Temperature [°C]	Holding Time [h]	Medium
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Cross Reference

Material Name	Country	Standard
NS 1402	China	YB/T 5353	1)
H08825	China	YB/T 5353	1)
NS 1402	China	YB/T 5354	1)
H08825	China	YB/T 5354	1)
NS 1402	China	YB/T 5355	1)
H08825	China	YB/T 5355	1)
NC21FeDU	France	AFNOR	2)
NA 16	Great Britain	BS 3072	1)
NA 16	Great Britain	BS 3073	1)
NCF 825	Japan	JIS G 4902	1)
NFC 825	South Korea	KS D 3532	1)
N08825	USA	UNS	3)
SB-424 UNS N08825	USA	ASME SB-424	3)
B424 UNS N08825	USA	ASTM B424	3)
NiCr21Mo	Germany	VdTÜV WB 432/1	1)
NiCr21Mo	Germany	VdTUV WB 432-1	1)
1) Source: Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
2) Source: VDM Metals GmbH, Werdohl, Werkstoffdatenblatt Nr. 4101, 11/2020
3) Source: Metals & Alloys in the Unified Numbering System, SAE/ASTM, 11th Edition, 2008

Producer/Supplier/Trade names

Tradename	Supplier
Nirosta 4858	Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Siegen	1)
NAS825	Nippon Yakin Kogyo Co., Ltd., Tokyo	2)
Ultra Alloy 825	Outokumpu Stainless AB (Schweden)	2)
Incoloy Alloy 825	Special Metals Wiggin Ltd., Hereford	2)
Incoloy Alloy 825	Special Metals Corporation, Huntington	2)
VDM Alloy 825	VDM Metals GmbH, Werdohl	2)
Alloy 825	VDM Metals GmbH, Werdohl	2)
1) Source: VdTÜV WB 432-1 Beiblatt : 2022-06
2) Source: VdTÜV WB 432-1 Beiblatt : 2021-02