Ma muli o kahao kalapona haʻahaʻame ka haʻahaʻa kalapona maʻiʻo, manganese, silika maʻiʻo nō hoʻi ka liʻiliʻi, no laila, ma lalo o nā kūlana maʻamau, ʻaʻole ia e welded e hana i ka ʻiʻo paʻakikī koʻikoʻi a i ʻole ka hale hoʻopau.ʻO nā hui kuʻi kalapona haʻahaʻa haʻahaʻa a me ka hopena maikaʻi o ka paʻakikī, wili, a maʻamau ʻaʻole pono ka preheating control layer wela a ma hope o ka wela, ʻaʻohe mālama wela post-weld e hoʻomaikaʻi ai i ka hui a ʻaʻole pono ke kaʻina hana kuʻilima āpau e lawe kūikawā. ana i ke kaʻina hana, maikaʻi weldability.

Eia nō naʻe, i kekahi mau hihia, pilikia pū kekahi wili:
(1) Ka hana ʻana o ke kila hoʻololi i ke ʻano o ka hoʻoheheʻe ʻana me ka nui o ka nitrogen content, ka mea haumia, ka brittleness anu, ka hoʻonui ʻana i ka naʻau i ka wā kahiko, hoʻemi i ka maikaʻi o nā hui welded, deteriorate welded.
(2) hoʻolapalapa kila deoxidation incomplete kiekie ae oxygen maʻiʻo, P haumia e like me uneven mahelehele o localized maʻiʻo e oi aku, elemakule sensitivity a me ke anu brittleness sensitivity o wela pohā mahuahua.
(3) ʻAʻole kūpono ka maikaʻi i nā koi o nā electrodes, no laila ke kalapona i ka weld metala, ʻoi aku ka kiʻekiʻe o ka sulfur content, hiki ke hana i nā māwae.Q235-ʻO ka hoʻoheheʻe ʻia ʻana o ke kila waikawa, e like me ka hale hana, no ka mea o ka electrode e uhi ana i ka ferromanganese kiʻekiʻe carbon content, e hoʻoulu ai i ka weld wela.
(4) ʻO kekahi ʻano hana kuʻi ʻana e hōʻemi i ka maikaʻi o nā hui welded o ke kila haʻahaʻa.E like me ka ikehu laina kuʻi electroslag, e hana i ka ʻāpana ʻōpala o ka ʻāina i hoʻopilikia ʻia i ka wela ke nānā aku i ka nui o ka emi ʻana o ka paʻakikī o ka hopena ma hope o ka hui ʻana pono e hoʻomaʻamaʻa ʻia ka palaoa e hoʻomaikaʻi i ka paʻakikī.

I ka pōkole, haʻahaʻa-carbon kila me ka weldability maikaʻi loa a me ka maʻalahi welded, a pau hana kuʻihao ua hoʻohana 'ia i ka haʻahaʻa-carbon wili kila.