Kodi ASTM A992 ndi chiyani?

TheASTM A992Kufotokozera / A992M -11 (2015) kumatanthawuza zigawo zazitsulo zopindidwa kuti zigwiritsidwe ntchito pomanga nyumba, zomangamanga za mlatho, ndi zina zomwe zimagwiritsidwa ntchito nthawi zambiri. Muyezowu umatchula ziwerengero zomwe zimagwiritsidwa ntchito kuti zidziwe zomwe zimafunikira pakuwunika kwamafuta monga: kaboni, manganese, phosphorous, sulfure, vanadium, titaniyamu, faifi tambala, chromium, molybdenum, niobium, ndi mkuwa. Muyezowu umatchulanso zinthu zophatikizika zomwe zimafunikira pakuyesa kolimba monga kulimba kwa zokolola, kulimba kwamphamvu, komanso kutalika.

ASTM A992(Fy = 50 ksi, Fu = 65 ksi) ndiye mawonekedwe okondedwa a zigawo zazikulu za flange ndipo tsopano alowa m'maloChithunzi cha ASTM A36ndiA572Kalasi 50. ASTM A992/A992M -11 (2015) ali ndi ubwino angapo osiyana: limatchula ductility zakuthupi, amene ndi pazipita kumavuta kuti zokolola chiŵerengero cha 0,85; Kuphatikiza apo, pamtengo wofanana ndi kaboni mpaka 0,5 peresenti, imatanthawuza kuti ductility ya zinthuzo ndi 0,85 peresenti. , kumapangitsanso kuwotcherera kwachitsulo pamtengo wofanana wa carbon mpaka 0.45 (0.47 kwa mbiri zisanu mu Gulu 4); ndi ASTM A992/A992M -11(2015) imagwira ntchito pamitundu yonse yamitundu yotentha yachitsulo.

Kusiyana pakati pa ASTM A572 Giredi 50 ndi zinthu za ASTM A992
Zinthu za ASTM A572 Grade 50 ndizofanana ndi zinthu za ASTM A992 koma pali zosiyana. Magawo ambiri a flange omwe amagwiritsidwa ntchito masiku ano ndi ASTM A992 giredi. Ngakhale ASTM A992 ndi ASTM A572 Giredi 50 nthawi zambiri zimakhala zofanana, ASTM A992 ndiyopambana pakupanga mankhwala komanso kuwongolera katundu wamakina.

ASTM A992 ili ndi mphamvu zokolola zochepa komanso mphamvu yocheperako yocheperako, komanso mphamvu zokolola zambiri mpaka chiŵerengero champhamvu champhamvu komanso mtengo wofanana wa carbon. Gulu la ASTM A992 ndilotsika mtengo kugula kuposa ASTM A572 Giredi 50 (ndi ASTM A36 giredi) pamagawo ambiri a flange.