1. Qhov sib txawv ntawm cov tshuaj muaj pes tsawg leeg
| Lub ntsiab | Gr.b Txwv | Gr.c Upper txwv | Hais hais |
|---|---|---|---|
| C | 0.26% | 0.23% | Gr.C muaj cov ntsiab lus me me thiab txo qis kev pheej hmoo ntawm kev tawg txias thaum vuam |
| P | 0.035% | 0.030% | Gr.C muaj kev tswj hwm kev cuam tshuam kev tswj hwm thiab qhov kub zoo dua kub |
| S | 0.035% | 0.025% | Gr.C muaj qis dua cov tub ntxhais cov ntsiab lus sulfur thiab kev ua haujlwm kub zoo dua |
2. Cov Khoom Siv Kho Tshuab Sib Piv
| Chaw ua uas tsis tau haus | Gr.B | GR.C | lub qho |
|---|---|---|---|
| Paib lub zog | Ntau dua los yog sib npaug rau 235 MPa | Ntau dua los yog sib npaug rau 315 mpa | +34% |
| Lub zog tensile | Ntau dua los yog sib npaug rau 400 MPa | Ntau dua los yog sib npaug rau 425 MPa | +6% |
| Elongation | Ntau dua los yog sib npaug rau 21% | Ntau dua los yog sib npaug rau 23% | +2% |
| Kev ua si dabtsi yog khoov | Raws li ib txwm | Zoo tshaj | Gr.C tuaj yeem khoov mus rau lub vojvoog me me |
3. Sib txawv ntawm cov ntawv thov tseem ceeb
| Ntaus | Cov Ntawv Thov | Qhov Zoo |
|---|---|---|
| Gr.B | Lub Hnav Cov Vaj Tsev Qub Qub, Cov Qauv Uas Siv Cov Qauv, Cov Khoom Siv Dav Txhawb | Tus nqi qis, sib ntsib cov kev xav tau |
| GR.C | Cov Machinery Chassis Cov Tshuab Chassis, Choj Load-Bearing Cov Cheebtsam, Kev Txhawb Cov Hluav Taws Xob Cov Hluav Taws Xob Siab Txhawb | High paib lub zog + nkees tsis kam, haum rau kev thauj khoom dynamic |
4. Cov ntsiab lus tseem ceeb ntawm kev ua thiab nqi
Cov txheej txheem vuam: Gr.C muaj qis dua cov pa roj carbon sib npaug (cet tsawg dua lossis sib npaug ntawm 0.45%), xoob vuam ua kua, thiab txo cov txheej txheem txo qis; Gr.b vuam yuav tsum tau tswj nruj me ntsis ntawm kev tawm tshiab kom tiv thaiv embrittlement.
Kev lag luam efficiency: gr.b yog li 15-20% pheej yig dua thiab haum rau cov phiaj xwm siv nyiaj txiag-ristic; Gr.C muaj lub zog tseem ceeb thiab qis dua cov nqi thauj khoom.
