Kuyini i-ASTM A992?

II-ASTM A992Imininingwane ye-/A992M -11 (2015) ichaza izingxenye zensimbi ezigoqiwe ezisetshenziswa ezakhiweni zokwakha, ezakhiweni zamabhuloho, nakwezinye izakhiwo ezisetshenziswa kakhulu. Indinganiso ichaza izilinganiso ezisetshenziswa ukunquma ukwakheka kwamakhemikhali okudingekayo kwezici zokuhlaziya ukushisa ezifana: ikhabhoni, i-manganese, i-phosphorus, i-sulfur, i-vanadium, i-titanium, i-nickel, i-chromium, i-molybdenum, i-niobium, kanye nethusi. Indinganiso iphinda ichaze izakhiwo zokucindezela ezidingekayo ekusetshenzisweni kokuhlola ukudonsa njengokuqina kokukhiqiza, amandla okudonsa, kanye nokwelulwa.

I-ASTM A992(Fy = 50 ksi, Fu = 65 ksi) iyincazelo yephrofayili ekhethwayo yezingxenye ze-flange ebanzi futhi manje ithatha indawo yayo.I-ASTM A36futhiA572Ibanga 50. I-ASTM A992/A992M -11 (2015) inezinzuzo eziningana ezihlukile: icacisa ukuqina kwezinto, okuyisilinganiso esiphezulu sokudonseka nokukhiqiza esingu-0.85; ngaphezu kwalokho, ngamanani alingana nekhabhoni afinyelela ku-0.5%, icacisa ukuthi ukuqina kwezinto kungamaphesenti angu-0.85. , ithuthukisa ukushibilika kwensimbi ngamanani alingana nekhabhoni afinyelela ku-0.45 (0.47 kumaphrofayili amahlanu kuQembu 4); kanye ne-ASTM A992/A992M -11(2015) isebenza kuzo zonke izinhlobo zamaphrofayili ensimbi ashisiwe.

Umehluko phakathi kwezinto ze-ASTM A572 Grade 50 nezinto ze-ASTM A992 Grade
Izinto ze-ASTM A572 Grade 50 zifana nezinto ze-ASTM A992 kodwa kukhona umehluko. Izingxenye eziningi ze-flange ezibanzi ezisetshenziswa namuhla ziyi-ASTM A992 grade. Ngenkathi i-ASTM A992 kanye ne-ASTM A572 Grade 50 ngokuvamile zifana, i-ASTM A992 ingcono kakhulu ngokwesakhiwo samakhemikhali kanye nokulawulwa kwempahla yemishini.

I-ASTM A992 inenani eliphansi lamandla okukhiqiza kanye nenani eliphansi lamandla okudonsa, kanye nesilinganiso esiphezulu samandla okukhiqiza kanye nenani eliphezulu elilingana nekhabhoni. Ibanga le-ASTM A992 lishibhile ukulithenga kune-ASTM A572 Ibanga 50 (kanye nebanga le-ASTM A36) lezingxenye ze-flange ezibanzi.