Alloy 825 / 2.4858

Alloy 825 is a titanium-stabilized, fully austenitic nickel-iron-chromium alloy with additions of copper and molybdenum. Alloy 825 is characterized by:

- Approval for pressure vessels with operating temperatures up to 425 ° C

- good resistance to stress corrosion cracking

- good resistance to oxidizing and non-oxidizing hot acids

- good mechanical properties at both room and elevated temperatures up to 550 ° C

- satisfactory resistance to pitting and crevice corrosion

Alloy 825 / 2.4858 metal powder for 3d metal printing

We are pleased to offer you powder for 3D printing made of 2.4858 (Alloy 825). Send us your inquiry.

Material Data Sheet

Material Designation	2.4858
Alloy	Alloy 825
EN Material Symbol	NiCr21Mo
UNS	N 08825
VdTÜV Datasheet	432/1
ISO	NiFe30Cr21Mo3

Main fields of application of alloy 825

Typical examples for the use of 825 are as follows:

- chemical plants

- Air-cooled heat exchangers in LNG process (LPG)

- Heat exchangers, evaporators, scrubbers, fork tubes, in the phosphoric acid production

- Components in sulfuric acid pickling lines, such as heating coils, tanks, boilers, baskets and chains

- Fuel element for a variety of media, such as dissolver sulfuric and nitric acid, sodium hydroxide, etc., which are used in the recycling process

- Food preparation

- seawater-cooled heat exchangers, offshore pipelines, pipes and parts in natural gas operation

Chemical composition of alloy 825

C	Si	Mn	P	S	Cr	Mo
%	≤ %	≤ %	≤ %	≤ %	%	%
0.025	0.5	1.0	0.02	0.015	19.5-23.5	2.5-3.5

Ni	Al	Co	Cu	Fe	Ti	B
%	%	≤ %	≤ %	%	%	≤ %
38.0-46.0	0.2	1.0	1.5-3.0	rest	0.6-1.2	0-0.006

Characteristics of alloy 825

Temperature Range	up to 550°C
Density	8.1 g/cm³
Melting Range	1370°C – 1400°C
Elongation at break of Alloy 825	30 %
ISO-V notch impact toughness	≥ 150 J/cm² at room temperature, lengthwise (only bars and forgings)
	≥ 100 J/cm² at room temperature, across

Filler metal (for welding with alloy 825)

Alloy 825 can be welded by all conventional methods.

The following welding is recommended:

WIG/MIG2.4831
SG- NiCr21Mo9NbFilter Rod2.4621
EL- NiCr20Mo9Nb

Delivery program

Sheets / Plates mm

2 - 15

Precision strip mm

0.2

With short delivery time:

plates or sheets, tubes, flanges, forged or die-cut rings and round blanks, elbows, T-fittings, reductions, screws, nuts or washers according to your request. According to your individual wishes, we are able to cut our material with our plasma- or water jet cutter. Our material is stocked in superformats of 2000x6000mm. Cut to size on request.

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Material Outlet by Hempel

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