Q1: Dab tsi yog Scope ntawm ASTM A53 tus qauv?
A:ASTM A53 npog seamless thiab welded dub thiab kub -dipped galvanized steel yeeb nkab npaj rau kev siv tshuab thiab siab, nrog rau kev thauj cov kua, ncu, cua, thiab dej -9.
Q2: Dab tsi yog qhov tseem ceeb ntawm cov cuab yeej cuab tam sib txawv ntawm Gr.A thiab Gr.B?
A:Gr.B muaj lub zog tensile tsawg dua (415 MPa vs . 330 MPa) thiab siab dua qhov qis tshaj tawm lub zog (240 MPa vs . 205 MPa) piv rau Gr.A -5-9.
Q3: Cov tshuaj muaj pes tsawg leeg sib txawv ntawm ob qib li cas?
A:Gr.B feem ntau muaj cov ntsiab lus siab tshaj carbon (0.30% vs . 0.25%) thiab manganese cov ntsiab lus (1.20% vs. 0.95%) dua Gr.A, ua rau nws muaj zog dua -9.
Q4: Dab tsi yog cov txheej txheem tsim khoom rau A53 kav?
A:Cov txheej txheem suav nrog peb hom: Hom S (seamless), Hom E (Electric-Resistance Welded), thiab Hom F (lub qhov cub-Welded) -9.
Q5: Puas yog normalizing kev kho cua sov yuav tsum tau rau A53 kav?
A:Tsis yog, normalizing tsis yog qhov yuav tsum tau ua raws li ASTM A53 tus qauv. Txawm li cas los xij, qee cov txheej txheem xws li ncej-weld tempering rau Qib B ERW kav yuav tsum tau.
