HSS txhais tau tias yog seem hlau khoob. Qhov seem hlau khoob (HSS) tsuas yog ua los ntawm cov hlau ua vaj tse raws li tus lej. Cov phaj hlau tiaj tiaj maj mam hloov mus rau ntau yam duab los ntawm kev vuam cov npoo xws li puag ncig lossis voj voog, elliptical, square, thiab rectangular thaum lub sijhawm tsim khoom. Cov seem hlau khoob plaub fab thiab rectangular qee zaum hu ua cov hlau raj lossis cov seem thawv.
Youfa kub muag khoom hlau tsis muaj zog hollow seem
Cov hlau tsis muaj zog, tseem hu ua cov kav hlau lossis cov kav hlau tsis muaj zog, yog ib hom hlau uas tsim ua ib lub raj hlau tsis muaj zog. Cov kav hlau tsis muaj zog raug muab faib ua peb hom tseem ceeb: cov kav hlau tsis muaj zog (RHS), cov kav hlau tsis muaj zog plaub fab (SHS) thiab cov kav hlau tsis muaj zog ncig (CHS). Txhua hom kav hlau tsis muaj zog muaj nws tus yam ntxwv thiab ua haujlwm rau lub hom phiaj tshwj xeeb. Cov kav hlau tsis muaj zog muaj ob qho tib si txias thiab kub tiav qib, S275 thiab S355. Cov kav hlau tsis muaj zog feem ntau siv rau hauv ntau yam kev tsim kho thiab kev siv tshuab, qhov twg lawv siv ua thav duab, kem, ntaiv thiab ntoo khaub lig.
Cov qauv thiab qib hlau ntawm cov seem hollow steel
| Cov Qauv | GB/T3091 GB/T13973 | API 5L ASTM A53 | ISO65 | BS1387 EN10219 | DIN2440 | JIS G3444 |
| Sib npaug qib hlau | Q195 | GR.A | √ | S195 | S195 | - |
| Q235 | GR.B | - | S235 | - | STK400 | |
| Q355 | GR.C | - | S355 | - | STK490 |
Cov khoom siv tshuaj lom neeg ntawm cov qauv Hollow seem
| Cov khoom siv tshuaj lom neeg ntawm cov hlau tsis muaj zog, WT≤16mm | |||||||||||
| Tus Qauv | Qib hlau | C (siab tshaj)% | Si (siab tshaj)% | Mn (siab tshaj)% | P (siab tshaj)% | S (siab tshaj)% | Cr (siab tshaj)% | Ni (siab tshaj)% | Cu (siab tshaj)% | N (siab tshaj)% | CEV (siab tshaj)% |
| GB/T 700-2006 | Q235A | 0.22 | 0.35 | 1.4 | 0.045 | 0.05 | - | - | - | - | - |
| GB/T 700-2006 | Q235B | 0.2 | 0.35 | 1.4 | 0.045 | 0.045 | - | - | - | - | - |
| GB/T1591—2018 | Q355B | 0.24 | 0.55 | 1.6 | 0.035 | 0.035 | 0.3 | 0.3 | 0.4 | 0.012 | 0.45 |
Cov khoom siv kho tshuab ntawm cov qauv hlau tsis muaj zog hollow seem
| Cov khoom siv kho tshuab, WT≤16mm | |||
| Tus Qauv | Qhov tsawg kawg nkaus ntawm cov nyiaj tau los lub zog MPa | Lub zog tensile MPa | Qhov ntev tsawg kawg nkaus % |
| GB/T 700-2006 | 235 | 370-500 | 26 |
| GB/T 700-2006 | 235 | 370-500 | 26 |
| GB/T1591—2018 | 355 | 470-630 | 20 |
Youfa hom galvanized hlau me me hollow seem
1. Galvanized hollow steel seem
2. RHS SHS Galvanized hollow steel seem
Lub sijhawm tshaj tawm: Lub Xya Hli-25-2025