Chuma cha aloi ya chini kinarejelea chuma cha aloi kilicho na maudhui ya kaboni ya chini ya 0.45% na maudhui ya jumla ya vipengele vingine vya aloi isiyozidi 5%. Aloi ya chini ya chuma iliyopigwa ina nguvu ya juu, ugumu mzuri na ugumu. Chuma cha aloi ya chini kwa ujumla huwa na vipengele vya aloi kama vile manganese, chromium, shaba, nikeli, molybdenum na vanadium. Wana ushupavu mkubwa wa athari na wanaweza kupata sifa bora za kiufundi kupitia matibabu ya joto. Upinzani wa kutu na upinzani wa kuvaa kwa chuma cha chini cha alloy ni bora kuliko chuma cha kaboni, ambacho kinaweza kupunguza uzito wa sehemu na kuongeza maisha ya huduma.
Madaraja na Miundo ya Kemikali ya Chuma cha Kutupwa cha Aloi ya Chini | |||||||||
| Daraja | C (%) | Si (%) | Mn (%) | P≦ (%) | S≦ (%) | Kr (%) | Ni (%) | Mo (%) | Cu≦ (%) |
| ZG20Mn | 0.16~0.22 | 0.6~0.8 | 1.00~1.30 | 0.03 | 0.03 | -- | ≦0.4 | -- | -- |
| ZG30Mn | 0.27~0.34 | 0.30~0.50 | 1.20~1.50 | 0.03 | 0.03 | -- | -- | -- | -- |
| ZG35Mn | 0.30~0.40 | 0.60~0.80 | 1.10~1.40 | 0.03 | 0.03 | -- | -- | -- | -- |
| ZG40Mn | 0.35~0.45 | 0.30~0.45 | 1.20~1.50 | 0.03 | 0.03 | -- | -- | -- | -- |
| ZG40Mn2 | 0.35~0.45 | 0.20~0.40 | 1.60~1.80 | 0.03 | 0.03 | -- | -- | -- | -- |
| ZG45Mn2 | 0.42~0.49 | 0.20~0.40 | 1.60~1.80 | 0.03 | 0.03 | -- | -- | -- | -- |
| ZG50Mn2 | 0.45~0.55 | 0.20~0.40 | 1.50~1.80 | 0.03 | 0.03 | -- | -- | -- | -- |
| ZG35SiMnMo | 0.32~0.40 | 1.10~1.40 | 1.10~1.40 | 0.03 | 0.03 | -- | 0.20~0.30 | 0.3 | |
| ZG35CrMnSi | 0.30~0.40 | 0.50~0.75 | 0.90~1.20 | 0.03 | 0.03 | 0.50~0.80 | -- | -- | -- |
| ZG20MnMo | 0.17~0.23 | 0.20~0.40 | 1.10~1.40 | 0.03 | 0.03 | -- | -- | 0.20~0.35 | 0.3 |
| ZG30Cr1MnMo | 0.25~0.35 | 0.17~0.45 | 0.90~1.20 | 0.03 | 0.03 | 0.90~1.20 | 0.20~0.30 | -- | |
| ZG55CrMnMo | 0.50~0.60 | 0.25~0.60 | 1.20~1.80 | 0.03 | 0.03 | 0.60~0.90 | -- | 0.20~0.30 | 0.3 |
| ZG40Cr1 | 0.35~0.45 | 0.20~0.40 | 0.50~0.80 | 0.03 | 0.03 | 0.80~1.10 | -- | -- | -- |
| ZG34Cr2Ni2Mo | 0.30~0.37 | 0.30~0.60 | 0.60~1.00 | 0.03 | 0.03 | 1.40~1.70 | 1.40~1.70 | 0.15~0.35 | -- |
| ZG15Cr1Mo | 0.12~0.20 | 0.6 | 0.50~0.80 | 0.03 | 0.03 | 1.00~1.50 | -- | 0.45~0.65 | -- |
| ZG20CrMo | 0.17~0.25 | 0.20~0.45 | 0.50~0.80 | 0.03 | 0.03 | 0.50~0.80 | -- | 0.45~0.65 | -- |
| ZG35Cr1Mo | 0.30~0.37 | 0.30~0.50 | 0.50~0.80 | 0.03 | 0.03 | 0.80~1.20 | -- | 0.20~0.30 | -- |
| ZG42Cr1Mo | 0.38~0.45 | 0.30~0.60 | 0.60~1.00 | 0.03 | 0.03 | 0.80~1.20 | -- | 0.20~0.30 | -- |
| ZG50Cr1Mo | 0.46~0.54 | 0.25~0.50 | 0.50~0.80 | 0.03 | 0.03 | 0.90~1.20 | -- | 0.15~0.25 | -- |
| ZG65Mn | 0.60~0.70 | 0.17~0.37 | 0.90~1.20 | 0.03 | 0.03 | -- | -- | -- | -- |
| ZG28NiCrMo | 0.25~0.30 | 0.30~0.80 | 0.60~0.90 | 0.03 | 0.03 | 0.35~0.85 | 0.40~0.80 | 0.35~0.55 | -- |
| ZG30NiCrMo | 0.25~0.35 | 0.30~0.60 | 0.70~1.00 | 0.03 | 0.03 | 0.60~0.90 | 0.60~1.00 | 0.35~0.50 | -- |
| ZG35NiCrMo | 0.30~0.37 | 0.60~0.90 | 0.70~1.00 | 0.03 | 0.03 | 0.40~0.90 | 0.60~0.90 | 0.40~0.50 | -- |
Mitambo mali ya aloi ya chini kutupwa chuma | |||||||||
| Daraja | Matibabu ya joto | Nguvu ya Mazao Rp0.2/Mpa (≧) | Nguvu ya Mkazo Rm/Mpa (≧) | A(%) ≧ | Z(%) ≧ | KU2/J ≧ | KV2/J ≧ | AKDVM/J ≧ | Ugumu HBW |
| ZG20Mn | Kurekebisha + Kukasirisha | 285 | 495 | 18 | 30 | 39 | -- | -- | 145 |
| Kuzima + Kukasirisha | 300 | 500 ~ 650 | 24 | -- | -- | 45 | -- | 150-190 | |
| ZG30Mn | Kurekebisha + Kukasirisha | 300 | 558 | 18 | 30 | -- | -- | -- | 163 |
| ZG35Mn | Kurekebisha + Kukasirisha | 345 | 570 | 12 | 20 | 24 | -- | -- | -- |
| Kuzima + Kukasirisha | 415 | 640 | 12 | 25 | 27 | -- | 27 | 200-240 | |
| ZG40Mn | Kurekebisha + Kukasirisha | 295 | 640 | 12 | 30 | -- | -- | -- | 163 |
| ZG40Mn2 | Kurekebisha + Kukasirisha | 395 | 590 | 20 | 40 | 30 | -- | -- | 179 |
| Kuzima + Kukasirisha | 685 | 835 | 13 | 45 | 35 | -- | 35 | 269~302 | |
| ZG45Mn2 | Kurekebisha + Kukasirisha | 392 | 637 | 15 | 30 | -- | -- | -- | 179 |
| ZG50Mn2 | Kurekebisha + Kukasirisha | 445 | 785 | 18 | 37 | -- | -- | -- | -- |
| ZG35SiMnMo | Kurekebisha + Kukasirisha | 395 | 640 | 12 | 20 | 24 | -- | -- | -- |
| Kuzima + Kukasirisha | 490 | 490 | 12 | 25 | 27 | -- | 27 | -- | |
| ZG35Mn | Kurekebisha + Kukasirisha | 345 | 570 | 12 | 20 | 24 | -- | -- | -- |
| Kuzima + Kukasirisha | 415 | 640 | 12 | 25 | 27 | -- | 27 | -- | |
| ZG35CrMnSi | Kurekebisha + Kukasirisha | 345 | 690 | 14 | 30 | -- | -- | -- | 217 |
| ZG20MnMo | Kurekebisha + Kukasirisha | 295 | 490 | 16 | -- | 39 | -- | -- | 156 |
| ZG30Cr1MnMo | Kurekebisha + Kukasirisha | 392 | 686 | 15 | 30 | -- | -- | -- | -- |
| ZG55CrMnMo | Kurekebisha + Kukasirisha | / | / | -- | -- | -- | -- | -- | -- |
| ZG40Cr1 | Kurekebisha + Kukasirisha | 345 | 630 | 18 | 26 | -- | -- | -- | 212 |
| ZG34Cr2Ni2Mo | Kuzima + Kukasirisha | 700 | 950-1000 | 12 | -- | -- | 32 | -- | 240~290 |
| ZG15Cr1Mo | Kurekebisha + Kukasirisha | 275 | 490 | 20 | 35 | 24 | -- | -- | 140-220 |
| ZG20CrMo | Kurekebisha + Kukasirisha | 245 | 460 | 18 | 30 | 30 | -- | -- | 135-180 |
| Kuzima + Kukasirisha | 245 | 460 | 18 | 30 | 24 | -- | -- | -- | |
| ZG35Cr1Mo | Kurekebisha + Kukasirisha | 392 | 588 | 12 | 20 | 23.5 | -- | -- | -- |
| Kuzima + Kukasirisha | 510 | 686 | 12 | 25 | 31 | -- | 27 | 201 | |
| ZG42Cr1Mo | Kurekebisha + Kukasirisha | 343 | 569 | 12 | 20 | -- | 30 | -- | -- |
| Kuzima + Kukasirisha | 490 | 690~830 | 11 | -- | -- | -- | 21 | 200-250 | |
| ZG50Cr1Mo | Kuzima + Kukasirisha | 520 | 740~880 | 11 | -- | -- | -- | 34 | 200-260 |
| ZG65Mn | Kurekebisha + Kukasirisha | / | / | -- | -- | -- | -- | -- | -- |
| ZG28NiCrMo | -- | 420 | 630 | 20 | 40 | -- | -- | -- | -- |
| ZG30NiCrMo | -- | 590 | 730 | 17 | 35 | -- | -- | -- | -- |
| ZG35NiCrMo | -- | 660 | 830 | 14 | 30 | -- | -- | -- | -- |
Muda wa kutuma: Sep-29-2024