Qhov ncaj EN sib npaug ntawm GB Φ50 Q355B puag ncig bar yog EN Φ50 S355JR (ib EN 10025-2 thiab EN 10279), nrog rau qhov sib npaug, qhov hnyav, thiab lub peev xwm thauj khoom - haum rau cov ntawv thov xws li cov qauv pins, hnyav hnyav thiab shafts.
Cov ntsiab lus tseem ceeb sib npaug
Qhov ntev:
Txoj kab uas hla: 50 hli (EN kam rau ua ± 0.4 hli; GB kam rau ua ± 0.4 hli)- zoo tib yam, yog li EN tuav haum GB qhov (piv txwv li, Φ50 mm bore bearings) tsis muaj qhov khoob.
Ntev: 6-12 m tus qauv (EN kam rau ua ± 50 hli; GB kam rau ua ± 50 hli)
Kev Ncaj Ncees: Tsawg dua lossis sib npaug ntawm 1 mm / m (EN) vs. Tsawg dua lossis sib npaug li 1 mm / m (GB)- tseem ceeb rau kev sib hloov shafts, vim kev khoov tuaj yeem ua rau muaj kev vibration.
Qhov hnyav thiab ntu ntu:
Luj: 15.4 kg/m (EN) vs . 15.4 kg/m (GB)- xam los ntawm πr2ρ (ρ=7.85 g/cm³), kom ntseeg tau zoo tib yam logistics thiab load xam.
Cheeb tsam: 1963 mm² (EN) vs . 1963 mm² (GB) -shear thiab tensile muaj peev xwm sib hloov. A Φ50 S355JR bar resists ~ 87 kN shear load (1963 mm² × 44.5 MPa tso cai shear stress), tib yam li Q355B.
Mechanical Properties:
Yield zog: 355 MPa (tsawg dua los yog sib npaug li 16 hli) rau S355JR vs . 355 MPa rau Q355B- zoo tib yam rau nyias seem; 345 MPa (16-40 mm) rau ob qho tib si, kom ntseeg tau tias muaj peev xwm sib xws rau Φ50 hli tuav.
Tensile Strength: 470–630 MPa (EN) vs . 470–630 MPa (GB)- tsis txawv ntawm qhov siab tshaj plaws ua ntej tawg.
Kev txiav txim siab hloov pauv
Cov huab cua txias: Rau qhov ntsuas kub tsawg dua lossis sib npaug li 0 degree, hloov mus rau EN S355J0 (27 J ntawm 0 degree) lossis S355J2 (27 J ntawm -20 degree) kom phim Q355B's 34 J ntawm 0℃- tseem ceeb rau sab qaum teb Tuam Tshoj daim ntawv thov xws li Heilongjiang's industrial nroj tsuag.
Vuam: Ob leeg siv E5015 electrodes nrog cov tsis sib xws (220–240 A, 28–30 V rau Φ50 mm tuav). Tsis muaj kev hloov pauv rau kev sib koom tes tsim (xws li, 6 hli fillet welds rau bracket sib txuas).
Daim ntawv pov thawj: Thov EN 10204 Hom 3.1 MTRs rau S355JR tuav, sib npaug rau GB / T 247 Qib 2 daim ntawv pov thawj- tau lees paub los ntawm Suav tub ceev xwm rau qhov kev pom zoo.
EN Φ50 S355JR yog qhov poob - hloov pauv rau GB Φ50 Q355B, tsis tas yuav tsum muaj kev tsim lossis kev hloov kho.