E whakamahia ana i ngā wāhanga e rua mō te hurihanga pūngao me te tukatuka mōhiohio
I roto i te umanga hiko, ko te nuinga o te wā he nui te aukume, he iti te ngaronga matua o te koranu. I roto i te umanga hiko, ko te nuinga o te wā he iti, he waenga rānei te koranu, he nui te uruhanga aukume, he iti hoki te kaha akiaki. I ngā auau teitei, me hanga he rīpene angiangi, he koranu rānei, he teitei ake te ātete. I te nuinga o te wā he pepa, he rīpene rānei.
Hei utu mō te whakamahinga, nā te mea ka puta ngā aukume aukume tauutuutu ki roto i te rauemi, ka hua ake te ngaronga, ka iti ake te ātete o te koranu, ka nui ake te matotoru, ka teitei ake te auau o te papa aukume tauutuutu, ka nui ake ngā ngaronga o te aukume tauutuutu, ka nui ake te whakaiti i te aukume. Hei whakatutuki i tēnei, me hanga te rauemi kia angiangi ake te pepa (rīpene), ā, me pania te mata ki te paparanga ārai, me whakamahi rānei i ētahi tikanga hei hanga i te mata hei paparanga ārai waikura, ko aua koranu he mea noa te whakamahi i te paninga hiko konupora waikura.
Ko te koranu rino-nikora te nuinga o te wā e whakamahia ana i roto i te papa aukume tauutuutu, te nuinga mō te rino ioka, te whakawhiti, ngā whakawhiti hiko iti me te parenga aukume.
Ko ngā taipitopito e whai ake nei mō ā mātou hua 1J80:
Te hanganga matū
| hanganga | C | P | S | Mn | Si |
| ≤ | |||||
| Ihirangi(%) | 0.03 | 0.020 | 0.020 | 0.60~1.10 | 1.10~1.50 |
| hanganga | Ni | Cr | Mo | Cu | Fe |
| Ihirangi(%) | 79.0~81.5 | 2.60~3.00 | - | ≤0.2 | Para |
Pūnaha maimoatanga wera
| tohu toa | Waenga whakawera | pāmahana whakamahana | Puritia te pāmahana i te wā/h | Te tere whakamatao |
| 1j80 | Hauwai maroke, korehau rānei, kaua e neke ake te pēhanga i te 0.1 Pa | I te taha o te oumu e wera ana i te 1100~1150ºC | 3~6 | I roto i te 100 ~ 200 ºC / h, whakamatao tere ki te 400 ~ 500 ºC, tere ki te 200 ºC, utuhia. |

Ngā koranu whakararakei roto ko ngā koranu tino pīngore me ngā koranu pīngore pumau. Ka whakamahia hei hanga i ngā huānga pīngore pērā i ngā huānga tairongo pīngore, ngā huānga rokiroki pūngao me ngā huānga auau i roto i ngā taputapu tino tika.3J01,3J21,3J53

| koranu whakawhānui | ||||||||||
| Tau | C≤ | S≤ | P≤ | Mn | Si | Ni | Cr | Cu | Al | Fe |
| 6J10 | ≤0.05 | ≤0.01 | ≤0.01 | ≤0.3 | ≤0.2 | nI+cO rem | 9-10 | ≤0.2 | ≤0.4 | |
| 6J15 | ≤0.05 | ≤0.02 | ≤0.03 | ≤1.5 | 0.4-1.3 | 55-61 | 15-18 | ≤0.3 | te reme | |
| 6J20 | ≤0.05 | ≤0.01 | ≤0.01 | ≤0.7 | 0.4-1.3 | te reme | 20-23 | ≤0.3 | ≥1.5 | |
| 6J22 | ≤0.04 | ≤0.01 | ≤0.01 | 0.5-1.5 | ≤0.2 | te reme | 19-21.5 | 2.7-3.2 | 2-3 | |
| 6J23 | ≤0.04 | ≤0.01 | ≤0.01 | 0.5-1.5 | ≤0.2 | te reme | 19-21.5 | 2-3 | 2.7-3.2 | |
| 6J24 | ≤0.04 | ≤0.01 | ≤0.01 | 1.0-3.0 | 0.9-1.5 | te reme | 19-21.5 | 2.7-3.2 | ≤0.5 | |
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