European channels (UPE: parallel-}flange; UPN: tapered-flange) feem ntau siv ob qib steel hlau ib EN 10025-2: S235JR thiab S355JR- ncaj nraim nrog Tuam Tshoj tus GB Q235B thiab Q355B, ntsig txog
S235 JR: Sib npaug rau GB Q235B, tsim rau lub teeb -load daim ntawv thov (chaw nyob framing, txee kev txhawb nqa). Cov khoom tseem ceeb: 235 MPa yam tsawg kawg nkaus lub zog (tsawg dua lossis sib npaug ntawm 16 hli), 360-510 MPa tensile lub zog, 26% elongation (tshaj 50 hli), thiab 27 J cuam tshuam lub zog ntawm +20℃. Chemically, nws txwv carbon rau 0.24% (max), manganese rau 0.40–1.20%, thiab phosphorus / sulfur rau 0.045% (max txhua) - sib piv Q235B cov muaj pes tsawg leeg rau weldability nrog E4313 electrodes.
S355 JR: Sib npaug rau GB Q355B, siv rau hnyav- thauj khoom (bridge bracing, industrial thav duab). Cov khoom siv: 355 MPa yield zog (tsawg dua lossis sib npaug li 16 hli), 470-630 MPa tensile zog, 21% elongation, thiab 27 J cuam tshuam lub zog ntawm +20℃. Nws cov tshuaj txwv (C: 0.24% max, Mn: 1.00–1.60%, P / S: 0.035% max) iav Q355B, kom ntseeg tau tias muaj kev sib raug zoo nrog E5015 consumables.
Rau cov huab cua txias, qib European muab kev hloov kho tshiab:S235J0(27 J ntawm 0 degree, Q235C sib npaug) thiabS355J2(27 J ntawm -20 degree, Q355D sib npaug). Cov qib no siv cov kab nickel (0.5–1.0%) txhawm rau txhim kho qis- qhov kub thiab txias, ua tau raws li GB cov kev cai hauv cheeb tsam txias yam tsis muaj kev tsim kho dua tshiab.