DIN 17751 2.4858 Alloy Tube
Incoloy 825 DIN 17744 17750 17751 17752 17753 2.4858 N08825 is a nickel-iron-chromium alloy with additions of molybdenum and copper. This nickel steel alloy’s chemical composition is designed to provide exceptional resistance to many corrosive environments. It is similar to alloy 800 but has improved resistance to aqueous corrosion. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localized attack such as pitting and crevice corrosion.
Alloy 825 is especially resistant to sulfuric acids and phosphoric acids. This nickel steel alloy is used for chemical processing, pollution-control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production, and pickling equipment.
DIN 17744 17750 17751 17752 17753 2.4858 Characteristic as below:
1. Good stress corrosion cracking resistance performance
2. Good resistance for pitting and crevice corrosion performance
3. Good anti-oxidation and non-oxidzing heat acid performance
4. Good mechanical performance in both room temperature and up to 550℃
5. Have the pressure vessel authenticate when manufacture temperature up to 450℃
2.4858 Metallurgical structure: 825 is the face-centered cubic lattice structure.
| Standards |
Desciption |
| ASTM B163 |
Standard Specifications for seamless nickel and nickel alloy condensers and heat-exchanger tubes |
| ASTM B704 |
Standard Specification for Welded Alloy Tubes |
| ASTM B705 |
Standard Specification for Nickel-Alloy Welded Pipe |
| DIN 17744 (2002/09) |
nickel-forgeable alloy with molybdenum and chrome |
| DIN 17750 (2002/09) |
ribbons and sheet metal out of nickel with nickel-wrought alloy properties |
| DIN 17751 (2002/09) |
tubes out of nickel with nickel-wrought alloy properties |
| DIN 17752 (2002/09) |
rod made from nickel with nickel-wrought alloy properties |
| DIN 17753 (2002/09) |
wire out of nickel with nickel-wrought alloy properties |
| VdTÜV / Werkstoffblatt 432/1 |
extremely corrosion resistant nickel based alloy, niCr21Mo, material-nr. 2.4858 ribbon, sheet metal |
| VdTÜV / Werkstoffblatt 432/2 |
432/2 extremely corrosion resistant nickel based alloy, NiCr 21 Mo, material-nr. 2.4858 seamless pipe |
| VdTÜV / Werkstoffblatt 432/3 |
extremely corrosion resistant nickel based alloy, NiCr 21 Mo, material-nr. 2.3858 rod steel, forging |
| Material No. |
DIN 17744 17750 17751 17752 17753 2.4858 |
| EN symbol (short) |
NiCr21Mo |
| AISI/SAE |
— |
| UNS |
N 08825 |
| AFNOR |
NC 21 FeDU |
| BS |
NA 16 |
| alloy |
Alloy 825 |
| Registered work's labelen |
Incoloy® alloy 825 ; Nicrofer® 4221 |
| Standards |
VdTÜV 432
DIN 17744 17750 17751 17752 17753 |
The high corrosion-resistant alloy 2.4858 (alloy 825) is chiefly used in the offshore and chemical industries.
Our product range in 2.4858 (alloy 825) are tubes and pipes, fittings and flanges, accessories.
| Chemical composition |
C
≤ % |
Si
≤ % |
Mn
≤ % |
P
≤ % |
S
≤ % |
Cr
% |
Mo
% |
Ni
% |
V
% |
| 0,025 |
0,5 |
1 |
0,25 |
0,15 |
19,5-23,5 |
2,5-3,5 |
38,0-46,0 |
- |
Nb
% |
Ti
% |
Al
≤ % |
Co
≤ % |
Cu
% |
Fe
rest |
|
|
|
| - |
0,6-0,12 |
1,20 |
1,0 |
1,5,-3,0 |
Bal |
|
|
|
| in accordance with Key to Steel 2001 |
| Special characteristics |
| Temperature range |
Density kg/m³ |
Hardness (HB) |
| -10°C bis 450°C (pressure vessel up to 425°C) |
8.1 |
|
| high-corrosion resistant nickel-based alloy |
| Welding filler |
| covered rod electrode 2.4621 oder 2.4652 |
| Main fields of application |
| offshore, heat exchangers, chemical industry, phosphoric acid plants, sulphuric acid plants, caustic soda thickener, nuclear technology |
2.4360 | 2.4600 | 2.4602 | 2.4605 | 2.4610 | 2.4633 | 2.4816 | 2.4851 | 2.4856 | 2.4858 | 2.4889
3.7235 | 3.7035 | 3.7025
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