Is cóimhiotal iarainn-charbóin é iarann teilgthe a bhfuil mais-chodán de charbón níos mó ná 2.11%. Faightear iarann teilgthe trí iarann muc a remelting sa foirnéis, ag cur ferroalloy, cruach dramh, agus ag filleadh ar an bhfoirnéis chun an comhdhéanamh a choigeartú.Iarann teilgthe liathagus iarann insínte an dá iarann teilgthe is mó a úsáidtear chun teilgin a tháirgeadh.
Cuirtear gráid iarann teilgthe na Síne in iúl go príomha agus idirdhealú ag airíonna meicniúla. Léiríonn an chéad sraith uimhreacha sa ghrád an neart teanntachta íosta (i MPa), agus léiríonn an dara sraith uimhreacha (más ann dóibh) an fadú íosta ag an sos (%). Tá an dá shraith uimhreacha scartha le daise "-".
Is é cód litreach Béarla d'iarann teilgthe liath ná HT, áit arb é H an chéad litir den Pinyin Síneach (Hui Se) a chiallaíonn liath; Is é T an chéad litir ón Síneach Pinyin (Tie) iarainn. Léiríonn na huimhreacha i ngráid iarainn liath na Síne an neart teanntachta íosta (MPa). Mar shampla, is ionann HT250 agus iarann teilgthe liath le neart teanntachta íosta de 250 MPa.
| Comparáid idir Iarann Teilgthe Liath ó Thíortha Éagsúla | ||||||||||
| Níl. | tSín | tSeapáin | Stáit Aontaithe Mheiriceá | ISO | an Ghearmáin | Fhrainc | Rúis | RA | ||
| GB | JIS | ASTM | UNS | DIN | W-Nr. | NF GA | goist | BS | ||
| 1 | HT100 | FC100 | GG10 | 0. 6010 | EN-GJL-100 | gch10 | Grád 100 | |||
| 2 | ht 150 | FC150 | 150/~Uimh.20 | F11401 | ISO 185/JL/150 | GG15 | 0. 6015 | EN-GJL-150 | gc15 | Grád 150 |
| 3 | HT200 | FC200 | 200/~Uimh.30 | F12101 | ISO 185/JL/200 | GG20 | 0. 6020 | EN-GJL-200 | гч18 гч20 гч21 | Grád 180 Grád 220 |
| 4 | ht250 | FC250 | 250/~Uimh.35 | F12401 | ISO 185/JL/250 | GG25 | 0. 6025 | EN-GJL-250 | g24 gch25 | Grád 260 |
| 5 | HT300 | FC300 | 300/~Uimh.45 | F13101 | ISO 185/JL/300 | GG30 | 0. 6030 | EN-GJL-300 | g30 | Grád 300 |
| 6 | ht350 | FC350 | 350/~Uimh.50 | F13501 | ISO 185/JL/350 | GG35 | 0. 6035 | EN-GJL-350 | g35 | Grád 350 |
Cód litreacha i mbéarla aiarann insínteis é QT, áit arb é Q an chéad litir den Pinyin Síneach (Qiumo) de graifít sféaróideach na Síne; Is é T an chéad litir ón Síneach Pinyin (Tie) iarainn. Tá dhá shraith uimhreacha i ngráid iarainn insínte na Síne. Léiríonn an chéad sraith uimhreacha an neart íosta teanntachta (MPa), agus seasann an dara sraith uimhreacha don fhadú tar éis briste (%). Tá an dá shraith uimhreacha scartha le daise "-". Mar shampla, is ionann QT400-18 agus iarann insínte le neart teanntachta íosta de 480 MPa agus fadú íosta 18%.
| Iarann Insínte Grád ó Thíortha Éagsúla | ||||||||||
| Níl. | tSín | tSeapáin | Stáit Aontaithe Mheiriceá | ISO | Gearmáinis | Fhrainc | Rúis | RA BS | ||
| GB | JIS | ASTM | UNS | DIN | W-Nr. | NF | ||||
| 1 | FCD350-22 | - | - | 350-22 | - | - | - | BH35 | 350/22 | |
| 2 | QT400-15 | FCD400-15 | - | - | 400-15 | GGG-40 | 0. 7040 | EN-GJS-400-15 | Bch 40 | 370/17 |
| 3 | QT400-18 | FCD400-18 | 60-40-18 | F32800 | 400-18 | - | - | EN-GJS-400-18 | - | 400/18 |
| 4 | QT450-10 | FCD450-10 | 65-45-12 | F33100 | 450-10 | - | - | EN-GJS-450-10 | BH45 | 450/10 |
| 5 | QT500-7 | FCD500-7 | 80-55-6 | F33800 | 500-7 | GGG-50 | 0. 7050 | EN-GJS-500-7 | Bc 50 | 500/7 |
| 6 | QT600-3 | FCD600-3 | ≈80-55-06 ≈100-70-03 | F3300 F34800 | 600-3 | GGG-60 | 0. 7060 | EN-GJS-600-3 | Bч60 | 600/3 |
| 7 | QT700-2 | FCD700-2 | 100-70-03 | F34800 | 700-2 | GGG-70 | 0. 7070 | EN-GJS-700-2 | Bch 70 | 700/2 |
| 8 | QT800-2 | FCD800-2 | 120-90-02 | F36200 | 800-2 | GGG-80 | 0. 7080 | EN-GJS-800-2 | BH80 | 800/2 |
| 8 | QT900-2 | 120-90-02 | F36200 | 800-2 | GGG-80 | 0. 7080 | EN-GJS-900-2 | ≈Bч100 | 900/2 | |
| Comparáid Iarainn Liath | Micreastruchtúr (Codáin toirte) (％) | |||
| An tSín (GB/T 9439) | ISO 185 | ASTM A48/A48M | GA 1561 | Struchtúr Maitrís |
| HT100 (HT10-26) | 100 | Uimh.20 F11401 | EN-GJL-100 | Pearlite: 30-70 ％, calóga garbh; Ferrite: 30-70 ％; Eutectic Fosfar Dénártha: ＜7％ |
| HT150 (HT15-33) | 150 | Uimh.25A F11701 | EN-GJL-150 | Pearlite: 40-90 ％, calóga garbh meánach; Ferrite: 10-60 ％; Eutectic Fosfar Dénártha: ＜7％ |
| HT200 (HT20-40) | 200 | Uimh.30A F12101 | EN-GJL-200 | Pearlite: ＞95％, calóga meánach; Feiriún＜5％; Eutectic Fosfar Dénártha＜4％ |
| HT250 (HT25-47) | 250 | Uimh.35A F12401 Uimh.40A F12801 | EN-GJL-250 | Pearlite: ＞98％ calóga meánach tanaí; Eutectic Fosfar Dénártha: ＜2％ |
| HT300 (HT30-54) | 300 | Uimh.45A F13301 | EN-GJL-300 | Pearlite: ＞98％ calóga meánach tanaí; Eutectic Fosfar Dénártha: ＜2％ |
| HT350 (HT35-61) | 350 | Uimh.50A F13501 | EN-GJL-350 | Pearlite: ＞98％ calóga meánach tanaí; Eutectic Fosfar Dénártha: ＜1％ |
| Comparáid Iarainn Insínte | Comhdhéanamh Ceimiceach (％) | Struchtúr Maitrís | |||||||||
| GB/T 1348-1988 | ASTM A536-84(2004) | GA 1563:-1997 | C | Si | Mn | p | S | Mg | Re | daoine eile | |
| QT400-18 | 60-40-18① F32800 | GJS-400-18 JS1020 | 3.6-3.8 | 2.3-2.7 | ＜0.5 | ＜0.08 | ＜0.025 | 0.03-0.05 | 0.02-0.03 | — | Ferrite Annealed |
| QT400-15 | 60-42-10 F32900 | GJS-400-15 JS1030 | 3.5-3.6 | 3.0-3.2 | ＜0.5 | ＜0.07 | ＜0.02 | 0. 04 | 0. 02 | — | Ferrite Annealed |
| QT450-10 | 65-45-12 F33100 | GJS-450-10 JS1040 | 3.4-3.9 | 2.7-3.0 | 0.2-0.5 | ＜0.07 | ＜0.03 | 0.06-0.1 | 0.03-0.1 | — | Ferrite Annealed |
| QT500-7 | 70-50-05 | GJS-500-7 JS1050 | 3.6-3.8 | 2.5-2.9 | ＜0.6 | ＜0.08 | ＜0.025 | 0.03-0.05 | 0.03-0.05 | — | Pearlite + ferrite |
| QT600-3 | 80-60-03② F34100 | GJS-600-3 JS1060 | 3.6-3.8 | 2.0-2.4 | 0.5-0.7 | ＜0.08 | ＜0.025 | 0.035-0.05 | 0.025-0.045 | — | Pearlite normalaithe |
| QT700-2 | 100-70-03 F34800 | GJS-700-2 JS1070 | 3.7-4.0 | 2.3-2.6 | 0.5-0.8 | ＜0.08 | ＜0.02 | 0.035-0.065 | 0.035-0.065 | Mo0.15-0.4 Cu0.4-0.8 | Measc Microstructure |
| QT800-2 | - | GJS-800-2 JS1080 | 3.7-4.0 | ＜2.5 | ＜0.5 | ＜0.07 | ＜0.03 | — | — | Mo0.39 Cu0.82 | Measc Microstructure |
| QT900-2 | 120-90-02 F36200 | GJS-900-2 JS1090 | 3.5-3.7 | 2.7-3.0 | ＜0.5 | ＜0.08 | ＜0.025 | 0.03-0.05 | 0.025-0.045 | Mo0.15-0.25 Cu0.5-0.7 | Bainite Íochtarach |
| ① ó ASTM A716-2003. ② ó ASTM A476/A476M-2000. | |||||||||||
Am postála: Lúnasa-13-2022