Ko te maitai hiko e aro ana ki te witi he 3% te taumata silicon (Si:11Fe). Ka tukatukahia kia puta ai ngā āhuatanga tino pai i te ahunga hurihuri, nā te whakahaere pakari (nā Norman P. Goss i whakaaro) o te aronga tioata e pā ana ki te rau. Ka piki ake te kiato rerenga aukume mā te 30% i te ahunga hurihuri koiri, ahakoa ka heke tōna mātotoru aukume mā te 5%. Ka whakamahia mō ngā matua o ngā whakawhiti hiko me te tohatoha, ko te maitai e aro ana ki te witi hurihuri-matao ka whakarapopototia ki te CRGO.
Te whānuitanga rahi paerewa o te hua
| Matotoru Ingoa (mm) | Whānuitanga Ingoa (mm) | Diameter o roto (mm) |
| 0.23, 0.27, 0.30, 0.35 | 650-1200 | 508 |
Te rerekētanga o te Whānui, te Matotoru me te Roa
| Whānuitanga ingoa | Matotoru ingoa | Te rerekētanga matotoru | Te rerekētanga matotoru whakawhiti | Te rerekētanga whānui | Te whānui o te ātete | Ngāwariwari % |
| ≤650 800-1000 ≤1200 | 0.23, 0.27, 0.30, 0.35 | 0.23:±0.020 0.25:±0.025 0.30:±0.025 Te matotoru kē atu ±0.030 |
≤0.020 ≤0.025 |
≤0.015 |
0–1 |
≤1.5 |
Whakatakotoranga Hua, Taumaha Tukunga me te Paerewa Whakahaere
| Whakatakotoranga Hua | Taumaha Tukunga | Paerewa Whakahaere |
| Matotoru 0.23/0.27/0.39 * Koiri | Tukunga hua i runga i te taumaha koiri ≤2-3 tana | GB/T 2521.2-2016 |