1.4563
Data sheet material 1.4563 / Alloy 28
X1NiCrMoCu31-27-4
Super austenitic steel
Brief description
The material 1.4563 or Alloy 28 is a super-austenitic steel with a high nickel and chromium content. This material was developed for sulphuric and phosphoric acid applications and is frequently used in the offshore and chemical industries.
Standards and nomenclature
| EN | |
|---|---|
| DIN | X1NiCrMoCu31-27-4 |
| AISI | Alloy 28 |
| US | N08028 |
| EN | |
|---|---|
| DIN | X1NiCrMoCu31-27-4 |
| AISI | Alloy 28 |
| US | N08028 |
Chemical composition according to VdTÜV-WB 483
| Ni (nickel) | 30,0 | 32,0 |
| Cr (chromium) | 26,0 | 28,0 |
| C (carbon) | - | 0,02 |
| Mn (manganese) | - | 2,0 |
| Si (silicon) | - | 0,7 |
| Cu (copper) | 0,8 | 1,5 |
| P (phosphorus) | - | 0,02 |
| S (sulphur) | - | 0,015 |
| Mo (molybdenum) | 3,0 | 4,0 |
| N (nitrogen) | - | 0,15 |
-
-
min.
max.
Ni
(nickel)
30,0
32,0
Cr
(chrome)
26,0
28,0
C
(carbon)
-
0,02
Mn
(Manganese)
-
2,0
Si
(Silicon)
-
0,7
-
-
min.
max.
Cu
(copper)
0,8
1,5
P
(phosphorus)
-
0,02
S
(sulphur)
-
0,015
Mo
(Molybdenum)
3,0
4,0
N
(Nitrogen)
-
0,15
General properties
| Corrosion resistance | |
|---|---|
| Mechanical properties | good |
| Weldability | good |
Corrosion resistance
The material 1.4563 is characterised by excellent corrosion resistance in media containing sulphur and phosphorus, even if these are contaminated with chloride and fluoride additives. Thanks to its high nickel content, Alloy 28 is resistant to stress corrosion cracking. Its PREN value of ≥ 39 guarantees resistance to seawater.
Mechanical properties
Yield strength at 20°C
Rp0,2
N / mm²
≥ 220
Tensile strength at 20°C
Rm
N / mm²
500 - 750
Elongation
at 20°C
A5,65
≥ 40%
Modulus of elasticity
at 20°C
kN / mm²
195
Weldability
The material 1.4563 is easy to weld using conventional welding processes. These include TIG and MIG/MAG. The workpiece should be welded in a stress-free, metallically bright and dirt-free condition. A low heat input and targeted heat conduction must be observed. 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
The material 1.4563 tends to work harden more than low-alloy austenitic steels. For this reason, 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.
Thermal treatment
| Solution annealing | |
|---|---|
| Hot forming | 1100 - 1050°C |
| Cooling down | quickly with water or air |
| Solution annealing | |
|---|---|
| Hot forming | 1100 - 1050°C |
| Cooling down | quickly with water or air |
Physical properties
at 20°C
Density
kg/dm³
8,0
Electrical
Resistance
(ohm) mm²/m
1,00
Thermal conductivity
W/m K
12,0
Specific
Heat capacity
J/kg K
450
Markets & Applications
Chemistry
Oil and Gas
Offshore
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.
