Nūhou

koi hana
(1) Ka ikaika kiʻekiʻe: maʻamau, ʻoi aku ka ikaika o kona hua ma luna o 300MPa.
(2) Paʻakikī kiʻekiʻe: ʻo ka elongation e koi ʻia he 15% ~ 20%, a ʻoi aku ka paʻakikī o ka hopena ma ka lumi wela ma mua o 600kJ / m ~ 800kJ / m.No nā ʻāpana welded nui, koi ʻia ka ʻoi aku ka paʻakikī o ka haki.
(3) Hana maikaʻi kuʻihao a me ka hana anu.
(4) Haʻahaʻa anuanu brittle hoʻololi wela.
(5) Ke kū'ē i ka corrosion maikaʻi.
3. Nā hiʻohiʻona o ka paipu galvanized
(1) ʻO ke kalapona haʻahaʻa: ma muli o nā koi kiʻekiʻe no ka paʻakikī, weldability a me ka hana anuanu, ʻaʻole ʻoi aku ka nui o ke kalapona ma mua o 0.20%.
(2) Hoʻohui ʻia ka mea hao ma muli o manganese.
(3) Hoʻohui i ka niobium, titanium a i ʻole vanadium: kahi liʻiliʻi o ka niobium, titanium a i ʻole vanadium e hana i ka carbide maikaʻi a i ʻole carbonitride i loko o ke kila, kahi mea kūpono i ka loaʻa ʻana o nā hua ferrite maikaʻi a hoʻomaikaʻi i ka ikaika a me ka paʻakikī o ke kila.Eia kekahi, ʻo ka hoʻohui ʻana i kahi liʻiliʻi o ke keleawe (≤ 0.4%) a me ka phosphorus (ma kahi o 0.1%) hiki ke hoʻomaikaʻi i ka pale ʻana i ka corrosion.Hiki i ka hoʻohui ʻana i kahi mea liʻiliʻi o nā mea honua laha ʻole ke wehe i ka sulfur a me ke kinoea, hoʻomaʻemaʻe i ke kila, a hoʻomaikaʻi i ka paʻakikī a me ke kaʻina hana.