GX40CrNiSi25-20 (1.4848) chemical composition
Fully austenitic 25Cr-20Ni heat-resistant cast steel, the 25-20 workhorse of EN 10295. Higher nickel than 1.4837 gives better creep strength and structural stability for furnace rolls, radiant tubes, trays and fixtures.
- Designation
- GX40CrNiSi25-20
- Material no.
- 1.4848
- Standard
- EN 10295
- Also known as
- ≈ HK40, 25Cr-20Ni, ≈ 1.4841 / 1.4845 (wrought), G-X40CrNiSi25-20
- Family
- Heat-resistant cast steel
Chemical composition (mass %)
| Element | min | max |
|---|---|---|
| CCarbon | 0.30 | 0.50 |
| SiSilicon | 1.00 | 2.50 |
| MnManganese | – | 2.00 |
| PPhosphorus | – | 0.04 |
| SSulphur | – | 0.03 |
| CrChromium | 24.0 | 27.0 |
| NiNickel | 19.0 | 22.0 |
| MoMolybdenum | – | 0.50 |
| FeIron | remainder | |
Basis of values: Limits per EN 10295.
We cast GX40CrNiSi25-20
We produce heat-resistant castings by sand casting, and by centrifugal casting for cylindrical parts such as rings, bushings and sleeves. Every heat is analysed by OES; heat treatment, CNC machining in the group's Perama machine shop and EN 10204 3.1 certificates are available.
- Sand casting at our foundry in Mandra, Attica; centrifugal casting for bushings, sleeves and liners
- Heat treatment at the foundry (water, oil or air quench); CNC machining in our machine shop in Perama
- Spectrometer analysis of every heat, mechanical testing and NDT
- EN 10204 3.1 inspection certificates; ISO 9001 (both plants) and ISO 14001 (foundry) certified
Other grades in this family
For information only, without warranty: limits per the cited standard or, where stated, typical or house values; ≈ marks a comparable grade, not an equivalent. The current edition of the standard, the purchase order and the drawing govern.