Suav sib npaug ntawm S355JR yog dab tsi?
Qhov ze tshaj Suav sib npaug rau European S355JR cov qauv hlau yog Q345B (raws li cov qauv qub GB) lossis Q355B tshiab, ob qho tib si los ntawm GB / T 1591 tus qauv, muab cov txiaj ntsig zoo sib xws thiab cov khoom cuam tshuam, txawm tias txheeb xyuas cov lus qhia tshwj xeeb rau cov ntawv thov tshwj xeeb yog ib txwm pom zoo vim muaj qhov sib txawv me me hauv cov qauv.
Nkag siab S355JR:
S: Cov qauv hlau.
355: Yam tsawg kawg nkaus lub zog ntawm 355 MPa (rau thicknesses txog 16 hli).
JR: Qhia tias nws dhau qhov Charpy V-qhov ntsuas qhov cuam tshuam ntawm +20°C (chaw kub).
Direct sib npaug: Q355B
Q355: Qhia qhov tsawg kawg nkaus yield zog ntawm 355 MPa rau thickness ≤ 16 hli (tib yam li S355).
B: Qhia qhov cuam tshuam rau qib toughness, qhia qhov ntsuas kub ntawm +20°C thiab qhov cuam tshuam tsawg kawg nkaus ntawm ≥34 J (Charpy V-notch). Qhov no ncaj qha mus rau qhov yuav tsum tau "JR" (27 J ntawm +20° C). Lus Cim: Tus qauv Suav yuav tsum muaj lub zog tsawg dua me ntsis (34J vs. 27J), ua Q355B technically nruj me ntsis hauv qhov no.
Cov ntsiab lus keeb kwm yav dhau & Cov lus sib piv
Qhov sib npaug tau hloov zuj zus nrog cov qauv hloov pauv:
S355 JR
Q355B Q345B (Osolete rau qhov sib npaug)Tawm tswv yim: 355 MPa, cuam tshuam: 20 ° CS355J0 Q355C Q345C Tawm tswv yim: 355 MPa, cuam tshuam: 0 °C S355J2 Q355D Q345D tawm los: 355 MPa, cuam tshuam: -20 ° C S355K2 Q355E Q345E tawm los: 355 MPa -40 ° C, Impact
Kev hloov pauv tseem ceeb: Suav tus qauv GB / T 1591-2018 hloov GB / T 1591-2008. Qhov kev hloov tshiab loj tau hloov npe Q345 rau Q355 kom ua raws li cov kev sib tw npe thoob ntiaj teb (xws li Europe's S355 thiab Asmeskas's ASTM A572 Gr. 50).
Yog li ntawd:
Q345B (tus qauv qub) tsis yog qhov sib npaug ncaj qha.
Q355B (tus qauv tshiab) tam sim no yog qhov sib npaug ntawm S355JR.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau cov qauv tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
