1.4724
Data sheet material 1.4724 / AISI 405
X10CrAlSi13
Ferritic heat-resistant chrome steel
Brief description
The material 1.4724 or Sicromal 9 is a heat-resistant ferritic chromium steel with added aluminium. This material is often used in furnace construction due to its resistance up to approx. 850°C. Due to its increased chromium content, it is more resistant to scaling than the material 1.4713.
Standards and nomenclature
| EN | |
|---|---|
| DIN | X10CrAlSi13 |
| AISI | 405 |
| US | Sicromal 9 |
| EN | |
|---|---|
| DIN | X10CrAlSi13 |
| AISI | 405 |
| US | Sicromal 9 |
Chemical composition
| C (carbon) | - | 0,12 |
| Mn (manganese) | - | 1,0 |
| Si (silicon) | 0,7 | 1,4 |
| P (phosphorus) | - | 0,040 |
| S (sulphur) | - | 0,015 |
| Cr (chromium) | 12,0 | 14,0 |
| Al (aluminium) | 0,7 | 1,2 |
-
-
min.
max.
C
(carbon)
-
0,12
Mn
(Manganese)
-
1,0
Si
(Silicon)
0,7
1,4
P
(phosphorus)
-
0,040
S
(sulphur)
-
0,015
Cr
(chrome)
12,0
14,0
Al
(aluminium)
0,7
1,2
General properties
| Corrosion resistance | |
|---|---|
| Mechanical properties | medium |
| Forgeability | good |
| Weldability | conditional |
| Machinability | medium |
Special properties
Heat resistant
Scale resistant up to 850°C in air
Corrosion resistance
The material 1.4724 is scale-resistant up to 850°C and resistant to oxidising sulphurous gases. Its resistance to sulphur-containing reducing gases is somewhat lower, but still good.
Mechanical properties
at 20°C
Hardness
HB
≤ 192
Yield point
Rp0,2
N / mm²
≥ 250
Tensile strength
Rm
N / mm²
450 - 650
Elongation
A5,65
≥ 15%
Modulus of elasticity
kN / mm²
200
Forgeability
Forging takes place between 1150°C and 800°C. This is followed by rapid cooling and heat treatment.
Weldability
The material 1.4724 can be welded using all standard welding processes. However, the workpiece should be preheated to approx. 200°C - 300°C before welding. A low energy density should be selected to avoid coarse grain formation. After welding, stress relief annealing at 750°C - 800°C is recommended.
Machinability
This material tends to smear during machining due to its ferritic structure. Suitable cutting tools and adapted machining conditions should be selected.
Markets & Applications
Equipment engineering for high-temperature applications
High-temperature conveyor systems
Chain industry
Mechanical engineering
Industrial furnace construction
Flue gas desulphurisation
Physical properties
at 20°C
Density
kg/dm³
7,7
Electrical
Resistance
(ohm) mm²/m
0,75
Magnetisability
available
Thermal conductivity
W/m K
21
Specific
Heat capacity
J/kg K
500
Processing
| Cold forming | |
|---|---|
| Cold heading | not usual |
| Open-die and closed-die forging | Yes |
| Machining | rare |
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.
