Heat helu: ia mea he kila hooheheeia i ka helu o na manawa me ka kūikawā, traceability. He ʻokoʻa ka helu ʻana o nā wili like ʻole, akā he helu kēlā me kēia kila kapuahi.

Ua maheleia ka helu wela i ka helu kapuahi a me ka helu batch, o ka umu ahi "he kapuahi kahi i hanaia ai ke kila; ʻO ka "batch" e pili ana i kahi umu me ka nui like o ka pā.

Helu wela welahe ʻike. Puhi steelmaking kapuahi pahu helu e pili ana i ka helu o kēlā me kēia māhele o ka kālailai 'ana e hana i ka umu ahi, i ka helu o ka heluna hanau kila he qualitative. ʻO ka helu hui ka mālama wela o ka lepili kila. Pono e hana ʻia ka loiloi mīkini o kēlā me kēia pūʻulu o nā huahana, kaʻina hana huakaʻi. ʻO ka pūʻulu he hōʻoia i ka hoʻomohala kila.

Hiki ke hoʻokaʻawale ʻia kahi helu kapuahi i kekahi mau pūʻulu, ʻo ka helu like o ka pūʻulu like o ka umu kila e hiki ke ʻokoʻa ka nui, akā ʻaʻole i like ka pae i ka pā like. Hiki i nā ʻāpana like ʻole o nā papa helu wela like ʻole ke ʻano like ʻole, akā ʻaʻole i ka pae like ka mea pono e like me ka papa helu pūʻulu he maʻalahi loa, e like me API 5L Gr.b, nui nā mea hana i kēia mea, ʻoiaʻiʻo he nui. o ka hana ʻana mai loko mai o ka umu, a laila hoʻouna ʻia i ka wā e pono ai e hoʻouna ʻia e nā pūʻulu, e loaʻa i kēlā me kēia puʻupuʻu kahi helu momona. No laila, ʻo ka helu hui like, ʻokoʻa ka helu wela, akā inā he pilikia maikaʻi, hiki iā ʻoe ke waiho i laila e nānā i ka pilikia umu. Like pūʻulu, kēlā me kēia umu i loko o ke kaʻina hana, ka 'ae 'ia ka laula ma laila, e hiki i kekahi mau 'okoʻa liʻiliʻi hiki ke loaʻa i ka puʻupuʻu puʻupuʻu, me ka normalizing wela lapaʻau: wela lapaʻau me ka helu helu. Hoʻopau ʻia: ʻO kēlā me kēia hui mea hoʻohana (hiki ke noʻonoʻo ʻia kahi hui o nā ʻoki hoʻokahi).