He aha ka ASTM A992?

ʻO kaASTM A992/A992M -11 (2015) wehewehe i nā ʻāpana kila i ʻōwili ʻia no ka hoʻohana ʻana i nā hale kūkulu hale, nā hale alahaka, a me nā hale hoʻohana maʻamau. Hōʻike ka maʻamau i nā lakio i hoʻohana ʻia no ka hoʻoholo ʻana i ka haku mele e pono ai no nā ʻano loiloi thermal e like me: carbon, manganese, phosphorus, sulfur, vanadium, titanium, nickel, chromium, molybdenum, niobium, a me ke keleawe. Hōʻike pū ka maʻamau i nā waiwai compressive i koi ʻia no nā noi hoʻāʻo tensile e like me ka ikaika hoʻohua, ka ikaika tensile, a me ka elongation.

ASTM A992(Fy = 50 ksi, Fu = 65 ksi) ʻo ia ka ʻōlelo kikoʻī i makemake ʻia no nā ʻāpana flange ākea a ke pani nei i kēia manawa.ASTM A36aA572Papa 50. ʻO ka ASTM A992/A992M -11 (2015) he mau pono ʻokoʻa: hōʻike ia i ka ductility o ka mea, ʻo ia ka tensile kiʻekiʻe e hāʻawi i ka lākiō o 0.85; Eia kekahi, ma nā waiwai like kalapona a hiki i ka 0.5 pakeneka, hōʻike ia i ka ductility o ka mea he 0.85 pakeneka. , hoʻomaikaʻi i ka weldability o ke kila ma carbon equivalent values ​​a hiki i 0.45 (0.47 no nā ʻelima profiles i ka Pūʻulu 4); a pili ʻo ASTM A992/A992M -11(2015) i nā ʻano ʻano mea kila wela.

Nā ʻokoʻa ma waena o ka mea ʻo ASTM A572 Grade 50 a me ka mea ʻo ASTM A992 Grade
Ua like nā mea ʻo ASTM A572 Grade 50 me nā mea ASTM A992 akā aia nā ʻokoʻa. ʻO ka hapa nui o nā ʻāpana flange ākea i hoʻohana ʻia i kēia lā ʻo ASTM A992 grade. ʻOiai ʻo ASTM A992 a me ASTM A572 Grade 50 ka mea maʻamau, ʻoi aku ka maikaʻi o ka ASTM A992 ma ke ʻano o ka haku mele a me ka hoʻokele waiwai mechanical.

Loaʻa i ka ASTM A992 ka waiwai ikaika loaʻa haʻahaʻa a me ka waiwai o ka ikaika tensile liʻiliʻi, a me ka ikaika hāʻawi kiʻekiʻe i ka lākiō ikaika tensile a me ka waiwai like carbon kiʻekiʻe. ʻOi aku ke kumu kūʻai ma mua o ka ASTM A572 Grade 50 (a me ASTM A36) no nā ʻāpana flange ākea.