He aha ka ASTM A992?

ʻO kaASTM A992Ho'ākāka ka kiko'ī /A992M -11 (2015) i nā ʻāpana kila i ʻōwili ʻia no ka hoʻohana ʻana i nā hale kūkulu, nā hale alahaka, a me nā hale ʻē aʻe i hoʻohana pinepine ʻia. Ho'ākāka ke kūlana i nā lakio i hoʻohana ʻia e hoʻoholo i ka haku mele kemika e pono ai no nā ʻano loiloi wela e like me: kalapona, manganese, phosphorus, sulfur, vanadium, titanium, nickel, chromium, molybdenum, niobium, a me ke keleawe. Ho'ākāka pū ke kūlana i nā waiwai compressive e pono ai no nā noi ho'āʻo tensile e like me ka ikaika hua, ka ikaika tensile, a me ka elongation.

ASTM A992ʻO (Fy = 50 ksi, Fu = 65 ksi) ke kikoʻī makemake ʻia no nā ʻāpana flange ākea a ke pani nei i kēia manawaASTM A36a meA572Papa 50. He nui nā pono kūikawā o ASTM A992/A992M -11 (2015): kuhikuhi ia i ka ductility o ka mea, ʻo ia ka lakio tensile a yield kiʻekiʻe loa o 0.85; eia kekahi, ma nā waiwai like kalapona a hiki i ka 0.5 pakeneka, kuhikuhi ia he 0.85 pakeneka ka ductility o ka mea. , hoʻomaikaʻi i ka weldability o ke kila ma nā waiwai like kalapona a hiki i ka 0.45 (0.47 no nā ʻaoʻao ʻelima ma ka Hui 4); a pili ʻo ASTM A992/A992M -11(2015) i nā ʻano āpau o nā ʻaoʻao kila i ʻōwili wela ʻia.

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

Loaʻa iā ASTM A992 kahi waiwai ikaika haʻahaʻa loa a me kahi waiwai ikaika tensile haʻahaʻa loa, a me ka lakio ikaika yield kiʻekiʻe loa i ka ikaika tensile a me kahi waiwai like kalapona kiʻekiʻe loa. ʻOi aku ka liʻiliʻi o ke kumukūʻai kūʻai o ka papa ASTM A992 ma mua o ASTM A572 Papa 50 (a me ASTM A36 papa) no nā ʻāpana flange ākea.