Yintoni i-ASTM A992?

II-ASTM A992/ A992M -11 (2015) inkcazo ichaza amacandelo ensimbi adibeneyo ukuze asetyenziswe kwizakhiwo zokwakha, izakhiwo zebhulorho, kunye nezinye izakhiwo ezisetyenziswa ngokuqhelekileyo. Umgangatho uxela ulungelelwaniso olusetyenziselwa ukumisela ukubunjwa kweekhemikhali ezifunekayo kwimiba yohlalutyo lwe-thermal efana ne: carbon, manganese, phosphorus, sulfur, vanadium, titanium, nickel, chromium, molybdenum, niobium, kunye nobhedu. Umgangatho ukwachaza iipropathi ezicinezelayo ezifunekayo kwizicelo zovavanyo lwe-tensile ezifana namandla esivuno, amandla okuqina, kunye nobude.

I-ASTM A992(Fy = 50 ksi, Fu = 65 ksi) lubalulo lweprofayile ekhethiweyo kumacandelo abanzi eflange kwaye ngoku ithatha indawoI-ASTM A36kwayeA572IBanga 50. I-ASTM A992 / A992M -11 (2015) ineenzuzo ezininzi ezihlukeneyo: ichaza i-ductility yezinto eziphathekayo, eyona nto iphezulu yokulinganisa isivuno se-0.85; ukongeza, kumaxabiso alingana nekhabhoni ukuya kuthi ga kwi-0.5 yepesenti, icacisa ukuba i-ductility yezinto eziphathekayo yi-0.85 ekhulwini. , iphucula i-weldability yensimbi kwixabiso elilinganayo lekhabhoni ukuya kwi-0.45 (0.47 kwiiprofayili ezintlanu kwiQela 4); kunye ne-ASTM A992 / A992M -11 (2015) isebenza kuzo zonke iintlobo zeeprofayili zetsimbi ezishushu.

Umahluko phakathi kwemathiriyeli ye-ASTM A572 yeBanga lama-50 kunye nemathiriyeli yeBanga le-ASTM A992
Izinto ze-ASTM A572 zeBanga le-50 ziyafana nezinto ze-ASTM A992 kodwa kukho umahluko. Uninzi lwamacandelo e-flange abanzi asetyenziswayo namhlanje yi-ASTM A992 grade. Ngelixa i-ASTM A992 kunye ne-ASTM A572 iBanga lama-50 ziyafana, i-ASTM A992 iphezulu ngokwemichiza kunye nolawulo lwepropathi ngoomatshini.

I-ASTM A992 inexabiso elincinane lamandla emveliso kunye nexabiso eliphantsi lamandla e-tensile, kunye nowona mandla esivuno esikhulu ukuya kumlinganiselo wamandla e-tensile kunye nexabiso eliphezulu elilingana nekhabhoni. Ibakala le-ASTM A992 libiza ngaphantsi ukuthenga kune-ASTM A572 Grade 50 (kunye nebakala le-ASTM A36) kumacandelo abanzi eflange.