Yini i-ASTM A992?

II-ASTM A992/A992M -11 (2015) imininingwane ichaza izingxenye zensimbi ezigoqiwe ezizosetshenziswa ezakhiweni zokwakha, izakhiwo zamabhuloho, nezinye izakhiwo ezisetshenziswa kakhulu. Izinga licacisa izilinganiso ezisetshenziselwa ukunquma ukwakheka kwamakhemikhali okudingekayo ezicini zokuhlaziya okushisayo ezifana nalezi: ikhabhoni, i-manganese, i-phosphorus, isulfure, i-vanadium, i-titanium, i-nickel, i-chromium, i-molybdenum, i-niobium, nethusi. Izinga liphinde licacise izici ezicindezelayo ezidingekayo ekuhloleni okuqinile okunjengamandla esivuno, amandla aqinile, nobude.

I-ASTM A992(Fy = 50 ksi, Fu = 65 ksi) ukucaciswa kwephrofayela okuncanyelwayo kwezigaba ezibanzi ze-flange futhi manje kungena esikhundleniI-ASTM A36futhiA572IBanga 50. I-ASTM A992/A992M -11 (2015) inezinzuzo ezimbalwa ezihlukene: icacisa i-ductility yezinto ezibonakalayo, okuyisilinganiso esiphezulu sokudonsa ukukhiqiza esingu-0.85; ngaphezu kwalokho, kumanani alingana nekhabhoni afika kumaphesenti angu-0.5, icacisa ukuthi i-ductility yezinto ezibonakalayo ingamaphesenti angu-0.85. , ithuthukisa ukushisela kwensimbi kumanani alingana nekhabhoni kuze kufike ku-0.45 (0.47 kumaphrofayela amahlanu eQembu 4); kanye ne-ASTM A992/A992M -11(2015) isebenza kuzo zonke izinhlobo zamaphrofayili ensimbi agingqiwe ashisayo.

Umehluko phakathi kwe-ASTM A572 Grade 50 material kanye ne-ASTM A992 Grade material
Izinto ze-ASTM A572 zeBanga lama-50 ziyefana nezinto ze-ASTM A992 kodwa kunomehluko. Izigaba eziningi ezibanzi ze-flange ezisetshenziswa namuhla ziyi-ASTM A992 grade. Ngenkathi i-ASTM A992 ne-ASTM A572 IBanga lama-50 ngokuvamile zifana, i-ASTM A992 iphakeme ngokwemibandela yokwakheka kwamakhemikhali nokulawulwa kwempahla ngomshini.

I-ASTM A992 inenani elincane lamandla esivuno kanye nenani elincane lamandla e-tensile, kanye namandla okukhiqiza aphezulu kuya kusilinganiso samandla e-tensile kanye nenani eliphakeme elilingana nekhabhoni. Ibanga le-ASTM A992 libiza kancane ukulithenga kune-ASTM A572 Grade 50 (nebanga le-ASTM A36) ngezigaba ezibanzi ze-flange.