Kodi ASTM A992 ndi chiyani?

TheASTM A992Mafotokozedwe a /A992M -11 (2015) amafotokoza magawo achitsulo chopindika kuti agwiritsidwe ntchito m'nyumba zomangira, mlatho, ndi zina zomwe zimagwiritsidwa ntchito kwambiri. Muyezowu umatchula ma ratio omwe amagwiritsidwa ntchito kudziwa kapangidwe ka mankhwala ofunikira pazinthu zowunikira kutentha monga: kaboni, manganese, phosphorous, sulfure, vanadium, titaniyamu, nickel, chromium, molybdenum, niobium, ndi mkuwa. Muyezowu umatchulanso zinthu zomangirira zomwe zimafunikira poyesa kukoka monga mphamvu yokolola, mphamvu yokoka, ndi kutalika.

ASTM A992(Fy = 50 ksi, Fu = 65 ksi) ndiye mfundo yofunika kwambiri ya magawo a flange yayikulu ndipo tsopano ilowa m'malo mwake.ASTM A36ndiA572Giredi 50. ASTM A992/A992M -11 (2015) ili ndi ubwino wosiyanasiyana: imatchula kulimba kwa chinthucho, komwe ndi chiŵerengero chachikulu cha kulimba ndi kukolola cha 0.85; kuphatikiza apo, pamtengo wofanana ndi kaboni mpaka 0.5 peresenti, imatchula kuti kulimba kwa chinthucho ndi 0.85 peresenti. , imawongolera kusunthika kwa chitsulo pamtengo wofanana ndi kaboni mpaka 0.45 (0.47 pa ma profile asanu mu Gulu 4); ndipo ASTM A992/A992M -11(2015) imagwira ntchito pa mitundu yonse ya ma profile achitsulo otenthedwa.

Kusiyana pakati pa zinthu za ASTM A572 Giredi 50 ndi zinthu za ASTM A992 Giredi
Zipangizo za ASTM A572 Giredi 50 ndizofanana ndi za ASTM A992 koma pali kusiyana. Magawo ambiri a flange omwe amagwiritsidwa ntchito masiku ano ndi a ASTM A992 giredi. Ngakhale kuti ASTM A992 ndi ASTM A572 Giredi 50 nthawi zambiri zimakhala zofanana, ASTM A992 ndi yabwino kwambiri pankhani ya kapangidwe ka mankhwala ndi kuwongolera katundu wa makina.

ASTM A992 ili ndi mphamvu yocheperako yopezera phindu komanso mphamvu yocheperako yopezera phindu, komanso chiŵerengero cha mphamvu yopezera phindu pa mphamvu yopezera phindu komanso mtengo wofanana ndi kaboni. Mtundu wa ASTM A992 ndi wotsika mtengo kugula kuposa ASTM A572 Mtundu wa 50 (ndi mtundu wa ASTM A36) wa zigawo zazikulu za flange.