1. Klasifikasyon estanda
BS EN 10025 se adopsyon Britanik la nan estanda Ewopeyen an pou cho-woule asye estriktirèl, ki kouvri sis pati:
Pati 2: Jeneral asye estriktirèl (S275/S355)
Pati 3: Normalized/normalized-woule asye grenn jaden amann
Pati 4: Thermomekanik woule weldable asye grenn jaden
Pati 5: Dezagregasyon asye
Pati 6: Mache & apeze asye wo-sede
Konpozisyon chimik (tipik %)
| Eleman | S275jr | S355jr | Limit |
|---|---|---|---|
| C (max) | 0.21 | 0.22 | EN 10025-2 |
| Si (max) | 0.40 | 0.55 | |
| MN (max) | 1.50 | 1.60 | |
| P (max) | 0.035 | 0.035 | |
| S (max) | 0.035 | 0.035 | |
| CEV (max) | 0.40 | 0.45 | Fòmil PCM |
Diferans kle ant S275 & S355
| Paramèt | S275 | S355 |
|---|---|---|
| Sede fòs | 275 MPa | 355 MPa (↑ 29%) |
| Fòs rupture | 410-560 MPa | 470-630 MPa |
| Ekonomi pwa | - | Jiska 20% pi lejè pou menm chaj |
| Weldability (CEV) | Pi bon (0.40 max) | Bon (0.45 max) |
| Koute | Bese | Pi wo (~ 15-20% prim) |
