1. Kev sib piv cov lus ntawm cov qauv sib npaug ntawm ntau lub teb chaws
| Txheem | Sib xwsTeem nqi | Siv tau theem | Qhov taw qhia yuam kev sib phim |
|---|---|---|---|
| En | S355J2H/J2G4 | Gr.2 / Gr.3 | Paib lub zog thiab elongation zoo ib yam |
| Tus kab laug gb | Q355B/Q355C | GR.3 | Tensile lub zog loj dua los yog sib luag rau 470MPA, elongation ntau dua los yog sib npaug rau 22% |
| JIS | Stk490 / Stk500 | GR.3 | Carbon sib npaug tswj tau zoo sib xws, Veldability yog sib npaug |
| ISO | P460NH | GR.3 | Tsawg tsawg kub cuam tshuam nyuaj yog xwm txheej (-40 degree) |
2. Tub ntxhais kawm ua haujlwm piav qhia
Lub zog sib luag: European txheem S355J2H thiab lub teb chaws Q355C ob leeg ua kom tiav lub zog ntau dua lossis sib npaug ntawm 455mpa kom muaj ntawm Astm A252 Gr33;
Kev Tswj Xyuas Kev Tswj: Cov ntsiab lus carbon ntawm Japanese Tus Qauv Stk490 (C Ntau dua li ntawm 0.05%) yog ob qho tib si tsim qauv los xyuas kom meej;
Touggness lav: ISO P460NH kom meej meej lub zog loj dua los yog sib npaug nrog cov kev ua tau zoo dua nrog ASTM A252 Gr.3. ️
3. Cov ntawv thov sau ntawv
Certification Differences: European standard EN 10219 requires additional CE certification, while ASTM A252 only requires MTC material report; Partial correction: In the Chinese GB/T 700 standard, Q355B needs to be supplemented with V-notch impact test before it can completely replace Gr.3; Japanese standard STK500 is suitable for thick-walled pile foundations (>25mm), thiab STK490 yog pom zoo rau cov teeb meem nyias nyias-phab ntsa.
