Stkr490 thiab STKR400 yog ob qib tseem ceeb steel nyob rau hauv JIS G 3466 tus qauv. Lawv qhov sib txawv tseem ceeb nyob hauv lawv cov khoom siv mechanical thiab tshuaj lom neeg, uas cuam tshuam rau lawv cov ntawv thov thiab kev ua tau zoo. Ntawm no yog qhov sib piv ntawm ob:
| Stkr490 | Stkr400 | ||
| Tshuaj Muaj Tshuaj | Carbon (c) | Tsawg dua los yog sib npaug rau 0. 18% | Tsawg dua los yog sib npaug rau 0. 25% |
| Silicon (si) | Tsawg dua los yog sib npaug rau 0. 55% | Tsis muaj qhia meej cov ntsiab lus siab tshaj plaws ntawm cov ntsiab lus no | |
| Manganese (mn) | Tsawg dua los yog sib npaug rau 1.5% | Tsis muaj qhia meej cov ntsiab lus siab tshaj plaws ntawm cov ntsiab lus no | |
| Phosphorus (p) | Tsawg dua li lossis sib npaug rau 0. 04% | Tsawg dua li lossis sib npaug rau 0. 04% | |
| Sulphur (s) | Tsawg dua li lossis sib npaug rau 0. 04% | Tsawg dua li lossis sib npaug rau 0. 04% | |
| Cov Khoom Siv Neeg Kho Tshuab | Lub zog tensile | Ntau dua los yog sib npaug rau 490 mpa | Ntau dua los yog sib npaug rau 400 MPa |
| Yig tau taw tes lossis pov thawj kev ntxhov siab | Ntau dua los yog sib npaug rau 325 MPa | Ntau dua los yog sib npaug rau 245 MPa | |
| Elongation | Ntau dua los yog sib npaug rau 23% | Ntau dua los yog sib npaug rau 23% | |
Cov Ntawv Thov:
Stkr400:
- Siv rau cov hom phiaj dav dav.
- Haum rau cov ntawv thov uas muaj lub zog muaj zog yog qhov txaus.
- Feem ntau siv hauv kev tsim kho thiab cov ntawv thov uas tsis tas yuav muaj zog.
Stkr490:
- Siv rau cov ntawv thov uas xav tau lub zog siab dua.
- Haum rau cov txheej txheem sib xyaw uas yuav tsum tau dais ntau dua loads.
- Feem ntau siv nyob rau hauv kev tsim kho, txua cov qauv vaj tse, thiab lwm yam kev siv uas xav tau kev ua haujlwm zoo dua.
Performance:
Stkr490 muaj kev ua tau zoo dua ntawm lub zog thiab kav ntev, tab sis nws yuav tsawg dua thiab nyuaj rau kev sib piv rau STKR400.
Stkr400 muaj kev sib npaug zoo ntawm lub zog thiab formability, ua rau nws yooj yim dua los ua haujlwm nrog ntau yam kev tsim kho thiab kev tsim kho vajtse.
Cov kev sib txawv no hauv cov khoom siv tshuab thiab tshuaj lom neeg ua rau Stkr490 muaj lub zog siab dua rau stkr400, ua rau nws haum cov khoom siv uas yuav tsum tau muaj peev xwm ntau dua. Tsis tas li ntawd, STKR490 muaj ntau cov kev sib dhos ntau dua li silicon thiab manganese hauv nws cov tshuaj lom neeg muaj pes tsawg leeg, uas yuav pab txhawb nws txoj kev ua tau zoo. Stkr400, nrog nws cov ntau ntawm cov ntawv thov thiab cov yuav tsum muaj zog qis dua, yog siv rau cov hom phiaj dav dav. Qhov kev xaiv ntawm ob lub hom steel yuav yog nyob ntawm cov kev xav tau engineering thiab ua tau ua haujlwm.
