EN 10219 S355J2H Cov Hluav Taws Xob (EN35555555550. Nws cov txuj ci tseem ceeb thiab cov khoom siv hauv Suav rau kev sib raug zoo thiab cov yam ntxwv tseem ceeb muaj raws li nram no:
1. Cov qhab nia tseem ceeb
Lub teb chaws qauv sib npaug qib:
Q345D (Qee cov tuam ntxhab khij nws ua Q3555D) yog nws cov kev cuam tshuam hluav taws xob nrog tus kab kub
Qhov sib txawv: qhov txwv ntawm phosphorus (p) thiab sulfur cov ntsiab lus ntawm s355s%) yog qhov sib luag dua lossis sib npaug los yog sib npaug rau kev siv vuam kub tawg yog qis dua.
2. Kev ua haujlwm tsis sib piv sib piv
| Nta | S355J2H | Q345D |
|---|---|---|
| Paib lub zog | Ntau dua los yog sib npaug rau 355mpa (tuab tsawg dua lossis sib npaug nrog 16 hli) kom muaj ntau dua lossis sib npaug nrog 265moma (tuab 250-400mm) | Ntau dua los yog sib npaug rau 345mpa (tuab tsawg dua lossis sib npaug rau 16 hli) |
| Lub zog tensile | 470-630MPA | 470-630MPA |
| Tsawg qhov kub kub | -20℃cuam tshuam lub zog loj dua los yog sib npaug rau 27J (cov qauv yuav tsum tau) | -20℃cuam tshuam lub zog loj dua los yog sib npaug rau 34J (kev sim siab yog stricter) |
| Elongation | Ntau dua los yog sib npaug rau 22% (tuab tsawg dua lossis sib npaug rau 40mm) | Ntau dua los yog sib npaug rau 21% |
3. Tshuaj lom neeg tswj hwm (%)
| Ntsiab lus | S355j2h sauv txwv | Q345D Qaum Teb | Rooj mov |
|---|---|---|---|
| C | Tsawg dua los yog sib npaug rau 0.22 | Tsawg dua los yog sib npaug rau 0.18 | Weldability thiab lub zog sib npaug |
| Mn | Tsawg dua los yog sib npaug rau 1.60 | Tsawg dua los yog sib npaug rau 1.70 | Cov tshuaj muaj zog ntxiv dag zog |
| P | Tsawg dua los yog sib npaug rau 0.025 | Tsawg dua los yog sib npaug rau 0.030 | Txias brittleness tswj |
| S | Tsawg dua los yog sib npaug rau 0.025 | Tsawg dua los yog sib npaug rau 0.025 | Thermal tawg supression |
4. Cov ntaub ntawv raug cai
Kev tsim kho cov engineering: high-sas steel qauv SEDPED SUPREDCE thiab av qeeg tsis kam);
Choj Engineering: Main Beab ntawm Hla-Hiav Txwv (ntsev txau corrosion distance + tsawg kub kev ua tau lav);
Heavy machinery: crane boom pipe (fatigue life >10⁶ Cycles).
5. Kev tiv thaiv rau kev siv
Welding process: Thick-walled pipe (>25mm) yuav tsum 150℃preheating + hydrogen vuam vuam pas nrig;
Anti-corrosion treatment: Galvanized layer is required for marine environment (salt spray resistance >500 teev);
Txais Cov Qauv: EN1020-3.1 Warranty + Ultrasonic Qhov Kev Ntsuam Xyuas Kev Ntsuas Kom Paub Txog Kev Tshaj Tawm (EN10219 Qib B) yog qhov yuav tsum tau
