1.4562
Data sheet material 1.4562 / Alloy 31
X1NiCrMoCu32-28-7
Iron-nickel-chromium-molybdenum alloy
Brief description
The material 1.4562 or Alloy 31 is an iron-nickel-chromium-molybdenum alloy with added copper and nitrogen. This material acts as a link between high-alloy austenitic stainless steels and nickel alloys and is characterised by excellent resistance to a wide range of corrosive media. In certain areas of application, this material represents a genuine alternative to nickel alloys.
Standards and nomenclature
| EN | |
|---|---|
| DIN | X1NiCrMoCu32-28-7 |
| AISI | Alloy 31 |
| US | N08031 |
| EN | |
|---|---|
| DIN | X1NiCrMoCu32-28-7 |
| AISI | Alloy 31 |
| US | N08031 |
Chemical composition
| Ni (nickel) | 30,0 | 32,0 |
| Cr (chromium) | 26,0 | 28,0 |
| Fe (iron) | Rest | Rest |
| C (carbon) | - | 0,015 |
| Mn (manganese) | - | 2,0 |
| Si (silicon) | - | 0,3 |
| Cu (copper) | 1,0 | 1,4 |
| P (phosphorus) | - | 0,02 |
| S (sulphur) | - | 0,01 |
| Mo (molybdenum) | 6,0 | 7,0 |
| N (nitrogen) | 0,15 | 0,25 |
-
-
min.
max.
Ni
(nickel)
30,0
32,0
Cr
(chrome)
26,0
28,0
Fe
(iron)
Rest
Rest
C
(carbon)
-
0,015
Mn
(Manganese)
-
2,0
Si
(Silicon)
-
0,3
-
-
min.
max.
Cu
(copper)
1,0
1,4
P
(phosphorus)
-
0,02
S
(sulphur)
-
0,01
Mo
(Molybdenum)
6,0
7,0
N
(Nitrogen)
0,15
0,25
-
-
-
-
General properties
| Corrosion resistance | |
|---|---|
| Mechanical properties | good |
| Weldability | good |
Corrosion resistance
The material 1.4562 is characterised by excellent corrosion resistance in oxidising and reducing atmospheres and has a high resistance to corrosion and erosion corrosion in phosphorus-containing environments. Furthermore, Alloy 31 has excellent resistance in pure and contaminated sulphuric acid up to temperatures of approx. 80°C. Its PREN value of ≥ 48 ensures resistance to seawater and high resistance to pitting corrosion.
Mechanical properties
at 20°C
Yield point
Rp0,2
N / mm²
≥ 280
Tensile strength
Rm
N / mm²
650
Elongation
A5,65
≥ 40%
Modulus of elasticity
kN / mm²
198
Weldability
The material 1.4562 should be welded in the solution-annealed condition using conventional welding processes. These include TIG, MIG/MAG and plasma welding. The workpiece should be welded in a stress-free, metallically bright and dirt-free condition. Annealing colours should be removed immediately after welding, i.e. while still warm, using a stainless steel brush.
Machinability
Alloy 31 should be annealed during machining. The material 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 1.4562 has a significantly higher work hardening rate 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 - 1050°C |
| Cooling down | quickly with water or air |
| Solution annealing | |
|---|---|
| Hot forming | 1200 - 1050°C |
| Cooling down | quickly with water or air |
Physical properties
Density
at 20°C
kg/dm³
8,05
Electrical
Resistance with
20°C
(ohm) mm²/m
1,04
Melting range
1330 - 1370°C
Thermal conductivity
at 20°C
W/m K
11,7
Markets & Applications
Mining industry
Chemistry
Oil and Gas
Offshore
Flue gas desulphurisation
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.
