Alloy SGS-R25-20
Descriptions
The refractory alloy SGS-R25-20 is characterized by an excellent resistance to oxidation due to its chromium content. Its good hot properties make it suitable for a large number of
a large number of applications.
Designations
Designation SEVA : SGS-R25-20
Standard designations :
AFNOR Z 15 CNS 25-20 -M (NF A 32-057)
EN X15CrNiSi25-21 (NF EN 10095)
DIN 1.4841
AISI 310
Chemical Analysis
Fe : Bal.
C : 0.15
Mn : 2
Si : 2
Cr : 22 - 27
Ni : 18 - 22
P : 0.040
S : 0.030
Mechanical properties
Hardness: 156 HB
Tensile test at room temperature:
| Rp0,2 (MPa) | Rm (MPa) | A (%) |
| 230 | 550 | 30 |
Hot tensile test:
| Temperatures | 300°C | 600°C | 750°C | 900°C |
| Rp0,2 (en MPa) | 460 | 370 | 100 | 60 |
| Rm | NC | NC | 190 | 70 |
Elastic modulus at 20°C: E = 195 GPa
Creep resistance
For casted products: breaking stress in N.mm-2 (or MPa) for a duration of 10 000 hours:
| 700°C | 800°C | 900°C | 1000°C |
| 45 | 21 | 10 | 5 |
Applications
Areas of use
• Cement works
• Metallurgy
• Petrochemical industry
• Glass industry
• Hot forming toolings
• Glass toolings
Maximum temperature of use
900°C
Types of parts produced
• Furnace equipment
• Toolings for glass industry
• Toolings for titanium sheets for the aircraft industry (Hot Forming process - HF)
Standard structure
Austenitic with carbide precipitation.
Physical Properties
Density at 20°C: 7,8
Expansion coefficient α in 10-6 K-1
| Temperature | 300°C | 600°C |
| α | 19 | 23,3 |
Other properties
Magnetism: Non-magnetic
Thermal conductivity at 20°C: 14 W.m-1.K-1
Thermal capacity at 20°C: 500 J.kg-1.K-1
Production
SEVA produces the SGS-R25-20 alloy in an electric induction furnace.
Cast in a sand mold.
Heat treatment: Air hyperquenching.
Compatible processes
| Compatibility | |
| Machining | ●●●●● |
| Polishing | ●●●●● |
| Welding | ●●●●● |
| Forging | ●●●●● |
Contact us
Are you looking for high-quality metal alloy foundry blanks for your industrial projects? Contact us now for a free, no-obligation quote.
