EN-GJL-250 (EN-JL1040) chemical composition
The most widely used grey iron (formerly GG-25), with a pearlitic matrix, for pump casings and impellers, valve bodies, gearbox housings and brake parts. Typical chemistry; EN 1561 specifies tensile strength, not composition.
- Designation
- EN-GJL-250
- Material no.
- EN-JL1040
- Standard
- EN 1561
- Also known as
- GG-25, GG25
- Family
- Grey cast iron
Chemical composition (mass %)
| Element | min | max |
|---|---|---|
| CCarbon | 3.00 | 3.40 |
| SiSilicon | 1.80 | 2.30 |
| MnManganese | 0.60 | 1.00 |
| PPhosphorus | – | 0.12 |
| SSulphur | – | 0.12 |
| CrChromium | – | 0.40 |
| NiNickel | – | 0.30 |
| MoMolybdenum | – | 0.10 |
| CuCopper | – | 0.50 |
| SnTin | – | 0.10 |
| FeIron | remainder | |
Basis of values: EN 1561 specifies mechanical properties, not chemistry. The values shown are typical foundry ranges; the chemistry is adjusted so the casting meets the requirements of the ordered grade.
We cast EN-GJL-250
We sand cast GJL grades such as EN-GJL-250 (GG-25) for pump impellers, pump casings and housings, check the chemistry on our spectrometer and machine the parts in the group's own CNC machine shop, with EN 10204 3.1 certificates on request.
- 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.