Alloy 825 | 2.4858 Material Data Sheet

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Alloy 825 | 2.4858 directly from stock & cut to your required dimensions!

International identifiers
DIN 17744, NOMAC grade 14A0, Alloy 825, ASTM B424, N08825

The Alloy 825 has a very good corrosion resistance and a particularly good resistance to phosphoric and sulfuric acid. The material is easy to weld and can be used in operating conditions at low temperatures up to approx. 500°C.


Areas of application

The 2.4858 (Alloy 825) is mainly used as pipeline and pipes in the oil and gas industry. The nickel-based Alloy 825 is also used in the food industry (organic acids) and in the nuclear industry.

Corrosion resistancevery good
Machinability3  (1 = bad - 10 = good)
Corrosion class10  (1 = bad - 10 = good)


Welding: Alloy825 is easy to weld. The steels 2.4621 and 2.4831 are recommended as filler metals.

Corrosion resistance: The corrosion resistance is outstandingly excellent compared to conventional chrome-nickel-molybdenum steel and the resistance to chloride-induced intergranular corrosion, pitting and crevice corrosion as well as stress corrosion cracking is the main application property of this material.

Forging: Before forging, the steel should be warm up to 1150°C and 1180°C. The forging process takes place at 1150°C to 900°C followed by rapid air or water cooling. When the work process reaches 900°C, it must be heated up again, for example forging with multiple heats.

Cold forming: Due to the higher strain hardening than with austenitic stainless steels, higher forming forces are required.

Machining: the machining is difficult due to the high nickel alloy content. Turning should not take place when the cut is interrupted due to its tendency to work hardening, low cutting speeds and feed rates must be selected.



Cold formingis possible
Cold upsettingis possible
Machiningwith low cutting speed and feed
Open die and drop forgingis possible
Machine processing             not possible


Physical Properties:

Density (kg / dm³)8,05 to 8,14
Electrical resistance at 20°C (Ω mm2 /m)1,125
Electrical resistance at 550°C (Ω mm2 /m)1,260
Thermal conductivity at 20°C (W/m K)10,8 to 11,1
Specific heat capacity at 20°C (J/kg K)440
Specific heat capacity at 600°C (J/kg K)590
Modulus of elasticity at 20°C (GPa)195,5
Modulus of elasticity at 500°C (GPa)168,0


Special features:

  • Resistance to oxidizing and reducing (hot) acids

Mechanical properties at room temperature:

≥ 240≥ 35≥ 100 (landscape)

Minimum tensile strength Rm (geglüht): 590 N/mm2 
Brinell hardness: 135-170

Heat treatment
 Temperature in °CCooling
Hot forming1150 - 900air, water
Heat treatment  
Solution annealing (+AT)920 - 980water, air

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Chemical composition
Alloy 825CSiMnPSCrMoNiV
min.     19,52,5038,0   
Alloy 825AlCuNNbTiFe
min.   1,5      0,60 
max.0,203,0      1,20Rest
In stock

Alloy 825 Flat, forged, solution annealed/ water

Advantages of saw cut

The processing with the saw is a mechanical processing of the material, which results in a significantly lower unintended deformation and increased hardness for the existing structure, such as the thermal cutting.

Thus, the machined workpiece has a homogeneous structure even at the edge, which does not change in the continuation of the material.

This circumstance allows immediate finishing of the workpiece with milling or drilling . So it is not necessary to anneal the material or make a similar operation beforehand.

Do you have any questions?

We are happy to answer your questions and make you an offer for these and other materials. Contact us now for more information.

Heidi Sommer

Your contact person Heidi Sommer+49 (0) 35263-665-33

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Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!