Q: Cov tshuaj muaj pes tsawg leeg txhais tau tias S235JR lub kaum sab xis steel?
A:S235JR steel muaj tsawg dua lossis sib npaug ntawm 0.17% carbon, Tsawg dua lossis sib npaug rau 1.40% manganese, Tsawg dua lossis sib npaug li 0.045% phosphorus, thiab Tsawg dua lossis sib npaug rau 0.045% sulfur ib EN 10025-2. Nws cov ntsiab lus tsis tshua muaj carbon yog qhov tseem ceeb rau kev sib txuas, thaum manganese txhim kho lub zog. Cov lus "JR" qhia qhov tsawg kawg nkaus Charpy V-notch cuam tshuam lub zog ntawm 27J ntawm +20℃. Cov khoom seem zoo li tooj liab (tsawg dua lossis sib npaug li 0.55%) txhim kho atmospheric corrosion kuj. Qhov kev sib xyaw no sib npaug ntawm cov qauv kev ncaj ncees nrog kev tsim kom yooj yim rau cov qauv kev tsim kho European.
Q: S235JR txawv mechanically ntawm S275JR li cas?
A:S235JR muaj lub zog qis qis qis (235 MPa vs . 275 MPa rau S275JR) thiab lub zog tensile (360-510 MPa vs . 410-560 MPa). Nws elongation yog siab dua (26% min vs . 23% min), muab cov ductility zoo dua. S275JR cov ntsiab lus ntawm manganese / npib tsib xee nce ntxiv muaj peev xwm thauj khoom ntau dua tab sis txo qis formability. Rau cov qauv tsis tseem ceeb, S235JR tus nqi ua haujlwm tau zoo (5-10% qis dua) ua rau nws nyiam. Ob leeg ua raws li EN 10025-2 tab sis ua haujlwm txawv qhov yuav tsum tau ua.
Q: Vim li cas S235JR raug xaiv "JR" rau kev cuam tshuam toughness?
A:Qhov kev faib tawm "JR" yuam kom tsawg kawg yog 27J Charpy V-qhov cuam tshuam rau lub zog ntawm +20℃, sim rau EN 10045-1. Qhov no ua kom cov pob txha tiv thaiv nyob rau hauv nruab nrab kev ntxhov siab concentrations lossis dynamic loads. Cov qib siab dua xws li "J0" (-0 degree) lossis "J2" (-20 degree) muab kev ua haujlwm qis dua -kub. JR-qib haum rau cov huab cua huab cua feem ntau yam tsis muaj qhov xoom xoom. Daim ntawv pov thawj yuav tsum tau kuaj zeb rau traceability hauv kev nyab xeeb-tseem ceeb daim ntawv thov.
Q: Dab tsi EN cov qauv tswj hwm S235JR lub kaum sab xis steel ntau lawm?
A:Cov qauv tseem ceeb suav nrog EN 10025-2 (cov khoom siv), EN 10056-1 (qhov ntev ntev), thiab EN 10204 (cov ntawv pov thawj tshuaj xyuas). TS EN 10025-2 qhia txog cov tshuaj lom neeg / kev siv tshuab, thaum EN 10056-1 txhais ceg ntev (± 1.5mm rau Tsawg dua lossis sib npaug rau 80mm ob txhais ceg), ncaj, thiab siab ntev. EN 10204 Hom 3.1 / 3.2 daim ntawv pov thawj lees paub ua raws. CE kos npe raws li EU CPR 305/2011 yog qhov yuav tsum tau ua rau kev tsim kho.
Q: S235JR piv rau ASTM A36 li cas?
A:S235JR lub zog tawm los (235 MPa) yog qis dua A36's (250 MPa), tab sis tensile ranges sib tshooj (360-510 MPa vs . 400-550 MPa). A36 tso cai ntau dua sulfur / phosphorus (0.05% max), txo purity. S235JR's JR cuam tshuam kev kuaj tsis tas rau A36. Ob qho tib si tseem ceeb tshaj qhov weldability, txawm tias S235JR qhov qis CE (0.36 max) yooj yim vuam. Cov qauv hauv cheeb tsam hais txog kev siv: EN 1993-1-1 rau Europe, AISC rau Asmeskas.
