Q345B va Q355B past - qotishma, yuqori - qurilish, ko'priklar, og'ir mashinalar va sanoat inshootlarida keng qo'llaniladi.
Q355B - GB / T1591-2018 qoshida GB / T1591-2008-dan Q345B ga teng, shuningdek S355-2: 2004 yildagi S355-2: 2004 ga teng yangi nav.
Kimyoviy tarkibni taqqoslash (%)
| Material | C max | Si max | Mn max | P maxr | S max | Cr max | Ni max | Cu max | N max | Nb max | V max | TI MAX | Mo Maks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Q345B | 0.20 | 0.50 | 1.70 | 0.035 | 0.035 | 0.30 | 0.50 | 0.30 | 0.012 | 0.07 | 0.15 | 0.20 | 0.10 |
| Q355B | 0.20 | 0.55 | 1.60 | 0.030 | 0.030 | 0.30 | 0.30 | 0.40 | 0.012 | - | - | - | - |
Mexanik xususiyatlar taqqoslash
Qalinlik bilan ta'minlang (MPA)
| Qalinligi (mm) | Q345B | Q355B |
|---|---|---|
| 16 dan kam yoki teng | 345 dan katta yoki teng | 355 dan katta yoki teng |
| 16–40 | 335 dan katta yoki teng | 345 dan katta yoki teng |
| 40–63 | 325 dan katta yoki teng | 335 dan katta yoki teng |
| 63–80 | 315 dan katta yoki teng | 325 dan katta yoki teng |
| 80–100 | 305 dan katta yoki unga teng | 315 dan katta yoki teng |
| 100–150 | 285 dan katta yoki teng | 295 dan katta yoki teng |
| 150–200 | 275 dan katta yoki teng | 285 dan katta yoki teng |
| 200–250 | 265 dan katta yoki unga teng | 275 dan katta yoki teng |
| 250–400 | - | - |
Qalinlik bilan keskinlik kuchi (MPA)
| Qalinligi (mm) | Q345B | Q355B |
|---|---|---|
| 40 dan kam yoki unga teng | 470–630 | 470–630 |
| 40–63 | 470–630 | 470–630 |
| 63–80 | 470–630 | 470–630 |
| 80–100 | 470–630 | 470–630 |
| 100–150 | 450–600 | 450–600 |
| 150–250 | 450–600 | 450–600 |
| 250–400 | - | - |
Arizalar
Q345B va Q355B H - nurlari quyidagilardan foydalaniladi:
Sanoat va tender qurilishi
Ko'priklar va magistral qurilish
Og'ir texnika va jihozlar ramkalar
Yuqori kuch va chidamlilikni talab qiladigan po'lat konstruktsiyalar
Gnee po'lat ta'minoti va Q345B va Q355B H - Word Custom o'lchamlari va keyingi qayta ishlash xizmatlari bilan. Q345B yoki Q355B H - nur narxi xush kelibsiz.
