"S" - konstruktiv po'lat uchun qisqa;
"275" po'lat qalinligi 16 mm dan kam yoki unga teng bo'lgan minimal oqish quvvatini (MPa) anglatadi;
"JR" charpy zarba sinovi energiya qiymatlari bilan bog'liq sifat darajasini ko'rsatadi (27J, xona harorati 20 daraja sinovdan o'tgan);
1.0044 - S275JR ning po'lat raqami.
S275JR uglerodli po'lat plitalarning kimyoviy tarkibi (Kolcha tahlili maksimal%):
| Qalinligi (mm) | C | Mn | P | S | N | Cu |
| T 16 dan kam yoki teng | 0.21 | 1.5 | 0.035 | 0.035 | 0.012 | 0.55 |
| 16 | 0.21 | |||||
| 40 | 0.22 |
S275JR karbonli po'lat plitalar mexanik xususiyatlari:
| Baho | Minimal rentabellik Reh | Kuchlanish kuchi Rm | ||||||||||||
| MPa | MPa | |||||||||||||
| Nominal qalinligi | Nominal qalinligi | |||||||||||||
| mm | mm | |||||||||||||
| 16 dan kichik yoki teng | >16 | >40 | >63 | >80 | >100 | >150 | >200 | >250 | <3 | >3 | >100 | >150 | >250 | |
| 40 dan kam yoki teng | 63 dan kichik yoki teng | 80 dan kam yoki teng | 100 dan kam yoki teng | 150 dan kam yoki unga teng | 200 dan kam yoki teng | 250 dan kam yoki unga teng | 400 dan kam yoki teng | 100 dan kam yoki teng | 150 dan kam yoki unga teng | 250 dan kam yoki unga teng | 400 dan kam yoki teng | |||
| S275JR | 275 | 265 | 255 | 245 | 235 | 225 | 215 | 205 | - | 430-580 | 410-560 | 400-540 | 380-540 | - |
| Minimal cho'zilish - A | Teshik ta'siri testi | ||||||
| Lo=5,65 * √Demak (%) | |||||||
| Nominal qalinligi | Harorat | Min. so'riladi energiya |
|||||
| mm | |||||||
| >3 | >40 | >63 | >100 | >150 | >250 | daraja | J |
| 40 dan kam yoki teng | 63 dan kichik yoki teng | 100 dan kam yoki teng | 150 dan kam yoki unga teng | 250 dan kam yoki unga teng | 400 dan kam yoki teng | ||
| 23 | 22 | 21 | 19 | 18 | - | 20 | 27 |
