2.4851
Data sheet material 2.4851 / Alloy 601
NiCr23Fe15Al
Nickel-chromium-iron alloy
Brief description
The material 2.4851 or Alloy 601 is a nickel-chromium-iron alloy with excellent oxidation resistance at elevated temperatures. This material is also characterised by good resistance in oxidising and sulphurous media as well as under carburising conditions with good mechanical properties under short and long-term stress.
Standards and nomenclature
| EN | |
|---|---|
| DIN | NiCr23Fe15Al |
| AISI | Alloy 601 |
| US | N06601 |
| EN | |
|---|---|
| DIN | NiCr23Fe15Al |
| AISI | Alloy 601 |
| US | N06601 |
Chemical composition according to EN 10095
| Ni (nickel) | 58,0 | 63,0 |
| Cr (chromium) | 21,0 | 25,0 |
| Fe (iron) | - | 18,0 |
| C (carbon) | 0,03 | 0,1 |
| Mn (manganese) | - | 1,0 |
| Si (silicon) | - | 0,5 |
| Cu (copper) | - | 0,5 |
| Ti (titanium) | - | 0,5 |
| P (phosphorus) | - | 0,02 |
| S (sulphur) | - | 0,015 |
| B (boron) | - | 0,006 |
| Co (Cobalt) | - | 1,5 |
| Al (aluminium) | 1,0 | 1,7 |
-
-
min.
max.
Ni
(nickel)
58,0
63,0
Cr
(chrome)
21,0
25,0
Fe
(iron)
-
18,0
C
(carbon)
0,03
0,1
Mn
(Manganese)
-
1,0
Si
(Silicon)
-
0,5
Cu
(copper)
-
0,5
-
-
min.
max.
Ti
(Titanium)
-
0,5
P
(phosphorus)
-
0,02
S
(sulphur)
-
0,015
B
(boron)
-
0,006
Co
(Cobalt)
-
1,5
Al
(aluminium)
1,0
1,7
-
-
-
-
General properties
| Corrosion resistance | |
|---|---|
| Mechanical properties | good |
| Weldability | good |
Special properties
Heat-resistant, excellent high-temperature resistance above 550°C
According to EN 10095, the maximum application temperature in air is 1200°C
Corrosion resistance
The material 2.4851 has excellent resistance to oxidation at elevated temperatures. This grade also has good resistance to stress corrosion cracking. A firmly adhering oxide layer that is resistant to chipping remains in place even under alternating stresses with fluctuating temperatures.
Mechanical properties
at 20°C
Yield point
Rp0,2
N / mm²
≥ 205
Tensile strength
Rm
N / mm²
550 - 750
Elongation
A5,65
≥ 30%
Modulus of elasticity
kN / mm²
207
Weldability
The material 2.4851 is easy to weld using conventional welding processes. These include TIG, MIG/MAG, plasma, electron beam welding (EB) and manual metal arc welding. The workpiece should be welded in a stress-free, metallically bright and dirt-free condition. Low heat input, targeted heat conduction and rapid heat dissipation are recommended. The line bead technique should be used. The temperature of the intermediate layers should not exceed 120°C. Annealing colours should be removed immediately after welding, i.e. while still warm, using a stainless steel brush.
Machinability
Machining should be carried out in a solution-annealed condition. Alloy 601 tends to work harden more than low-alloy austenites. Therefore, a low cutting speed and a low feed rate should be selected. The tool should be in constant engagement. A sufficient cutting depth should be selected so that the previously created work-hardened zone can be undercut. To ensure a stable cutting process, heat dissipation should be optimised by using large quantities of suitable, water-based cooling lubricants.
Cold forming
Cold forming should be carried out in the solution-annealed condition. The material 2.4851 tends to work harden significantly more than most austenitic stainless steels. Intermediate annealing should be carried out for severe cold forming. If the degree of deformation exceeds 15%, a final solution annealing should be carried out.
Thermal treatment
| Solution annealing | |
|---|---|
| Hot forming | 1200 - 900°C |
| Cooling down | quickly with water or air |
| Solution annealing | |
|---|---|
| Hot forming | 1200 - 900°C |
| Cooling down | quickly with water or air |
Physical properties
Density
at 20°C
kg/dm³
8,05
Electrical
Resistance at 20°C
(ohm) mm²/m
1,22
Melting range
1330 - 1370°C
Thermal conductivity
at 20°C
W/m K
11,3
Specific
Heat capacity
at 20°C
J/kg K
472
Markets & Applications
Plant and apparatus engineering
Chemistry
Oil and Gas
Power plant construction
Industrial furnace construction
Environmental technology
Our
Delivery programme
Frequently asked questions
Important note
TEAM EDELSTAHL operates purely as a trading company without technical staff. Consequently, we are not authorised to provide material consulting services.
The above values and information on the properties and/or usability of the material are purely informative. This information is based on the experience of the manufacturer and TEAM EDELSTAHL. All information is without guarantee. Misprints, errors and changes excepted.
