1. Dab tsi yog qhov kev txwv tseem ceeb ntawm A500 sau tseg hauv tus qauv?
Tus qauv suav nrog cov lus ceeb toom (Note 1) hais tias cov khoom tsim rau A500 "yuav tsis haum rau cov ntawv thov xws li cov khoom siv hluav taws xob hauv cov khoom siv welded, thiab lwm yam., qhov twg qis - qhov kub thiab txias - cov khoom toughness yuav yog qhov tseem ceeb"-1-3-6. Qhov no yog hais txog cov khoom muaj peev xwm ua tau zoo nyob rau hauv kev cuam tshuam lossis seismic loading ntawm qhov kub thiab txias, uas tsis tau lees paub los ntawm tus qauv-6.
2. ASTM A500 txawv ntawm ASTM A1085 li cas?
Thaum A500 yog tus qauv dav dav, ASTM A1085 yog lwm txoj hauv kev uas muaj qhov ua kom nruj dua qhov ntev, lub siab tshaj plaws lub zog muaj peev xwm (70 ksi), thiab yuav tsum tau Charpy V-Notch (CVN) cov kev ntsuas cuam tshuam (piv txwv li, 25 ft-lb ntawm 40 ° F){11}5. Qhov no ua rau A1085 muaj txiaj ntsig zoo rau kev tsim thiab tsim nyog rau cov ntawv thov xws li cov tswv cuab choj thawj zaug, tab sis nws feem ntau yog tsim los ntawm kev thov thiab tsis tau npaj txhij raws li A500-5.
3. Kev sib raug zoo ntawm ASTM A500 thiab ASTM A501 yog dab tsi?
ASTM A501 yog qhov tshwj xeeb rau kub- tsim welded thiab seamless carbon steel structural tubing, ua rau nws kub - ua counterpart rau txias - tsim A500-2. Txawm li cas los xij, nws tau sau tseg tias tam sim no tsis muaj HSS cov neeg tsim khoom tsim khoom tsim qauv rau ASTM A501-5.
4. Rau qhov ntau thiab tsawg tshaj li cov kab A500, cov lus qhia dab tsi yog siv?
Rau cov duab plaub thiab square HSS nrog ib cheeb tsam loj dua 88 ntiv tes (txog 200 ntiv tes), ASTM A1065 yog cov lus qhia siv tau-5. Cov ntu loj no feem ntau yog ua los ntawm kev sib txuas ob qhov txias-tsim "C" duab ua ke siv submerged arc weld (SAW) txheej txheem-5.
5. Puas yog A500 haum rau corrosive ib puag ncig yam tsis muaj txheej?
Tsis yog, tus qauv A500 qib tsis yog tsim tshwj xeeb rau kev tiv thaiv corrosion. Rau kev txhim kho atmospheric corrosion kuj nyob rau hauv daim ntaub ntawv uas cov hlau yuav raug tso tseg tsis pleev xim rau, ASTM A847 (ib siab - zog, qis- alloy steel) yog qhov tsim nyog HSS specification los qhia-5.
