Q1: Yuav ua li cas feem ntau American standard yeeb nkab qib, ASTM A53 Qib B, cuam tshuam nrog Suav cov qauv ntawm cov tshuaj muaj pes tsawg leeg thiab daim ntawv thov?
A1:ASTM A53 Qib B feem ntau suav tias yog sib npaug rauGB/T 8163 Qib 20#(feem ntau sau ua 20 # steel). Thaum A53 Qib B muaj cov pa roj carbon tshwj xeeb (tsawg dua lossis sib npaug li 0.30%) thiab manganese (tsawg dua lossis sib npaug li 1.20%) txwv, Suav 20 # steel (C: 0.17-0.23%) zoo sib xws rau nws qhov tensile zog yuav tsum tau ntawm 415 MPa. Ob leeg feem ntau yog siv rau kev siv tshuab thiab kev siv siab ntawm qhov kub thiab txias, txawm hais tias A53 tso cai rau ob qho tib si welded (Hom E / F) thiab seamless (Hom S) kev tsim kho, qhov GB / T 8163 yog nruj seamless -1-4.
Q2: Yog tias ib qhov project qhia txog ASTM A53 Qib A, qib twg Suav steel muab cov tshuaj lom neeg thiab cov khoom sib tw ze tshaj plaws?
A2:ASTM A53 Qib A sib raug zoo tshaj plaws rauGB/T 8163 Qib 10#. Qib A muaj qhov qis zog tensile yuav tsum tau (330 MPa) piv rau Qib B. Suav 10 # steel, muaj me ntsis qis carbon (0.07-0.13%) dua 20#, replicates lub ductility thiab qis yield zog (205 MPa) ntawm A53 Qib A. Qhov kev sib xyaw ua ke no feem ntau yog siv rau kev ua haujlwm sib zog los yog tsis muaj zog.
Q3: Dab tsi yog qhov txawv ntawm ASTM A106 Qib B thiab ASTM A53 Qib B thaum sim nrhiav Suav sib npaug zoo li 20 #?
A3:Thaum ob qho tib si ASTM A106 Qib B thiab A53 Qib B feem ntau xoob hu ua "sib npaug rau 20# steel," A106 tshwj xeeb yog npaj rau siab -kev pabcuam kub. Cov tshuaj muaj pes tsawg leeg ntawm A106 Qib B muaj kev txwv nruj dua ntawm silicon (Si Ntau dua lossis sib npaug li 0.10%) thiab phosphorus / sulfur piv rau A53 Qib B. Yog li ntawd, thaum lub phiaj xwm xav tauGB 5310 (High - siab boiler raj), A106 yog qhov ncaj qha US tus neeg sawv cev, qhov A53 Qib B tsuas yog cov khoom siv rau cov qauv siv dav lossis qis dua - cov kua dej thauj hauv qab GB / T 8163 -8-9.
Q4: Nyob rau hauv cov ntsiab lus ntawm cov qauv welded kav, American ASTM A500 Qib B piv rau Suav tus qauv qauv raj Q235B li cas?
A4:ASTM A500 Qib B (txias-ua welded structural tubing) feem ntau ua rawsGB/T 6725 Q235B. Txawm li cas los xij, qhov sib txawv tseem ceeb nyob rau hauv lub zog tawm los: ASTM A500 Qib B yuav tsum muaj lub zog tsawg kawg nkaus ntawm 315 MPa rau phab ntsa tuab hauv qab 25 hli, thaum Q235B tsuas yog 235 MPa. Yog li ntawd, thaum formability zoo sib xws, A500 Qib B yog mechanically muaj zog. Rau kev hloov pauv ncaj qha,Q345BQee zaum siv los ua kom tau raws li qhov xav tau siab dua ntawm A500, txawm hais tias Q235B tseem yog cov npe sib npaug tshaj plaws hauv kev tsim kho lub teeb -2.
Q5: Dab tsi yog Suav sib npaug ntawm ASTM A135 Qib B, tshwj xeeb tshaj yog rau hluav taws xob -tsis kam welded (ERW) cov kav dej siv hauv siab - cov kab hluav taws xob siab?
A5:ASTM A135 Qib B (ERW steel yeeb nkab) sib haum rauGB/T 3091 Q295Blos yog txheemQ235Bnyob ntawm lub siab. A135 Qib B muaj qhov tsawg kawg nkaus lub zog ntawm 35,000 psi (241 MPa). Standard Q235B (yield 235 MPa) poob qis me ntsis, thaum Q295B (yield 295 MPa) tshaj nws. Rau kev nruj nruj kev ncaj ncees txuam nrog GB / T 3091, feem ntau engineers faibQ235BRaws li kev ua haujlwm sib npaug, muab cov phab ntsa tuab yog kho kom them nyiaj rau qhov sib txawv me ntsis -6
