JIS G3445 txhua yam yeeb nkab yog ib hom carbon steel yeeb nkab rau cov qauv siv tshuab. Tus qauv siv yog JIS G344512.
JIS G3445 txhua yam yeeb nkab yog siv rau hauv kev lag luam xws li tshuab, tsheb, tsheb kauj vab, rooj tog, khoom siv thiab lwm yam khoom siv tshuab2.
Lub ntsiab steel yeeb nkab qib ua los ntawm JIS G3445 txhua yam kav dej yog STKM11A, STKM12 (A, B, C), STKM (A, B, C), thiab lwm yam.
JIS G3445 Tshuaj Ntsuam Xyuas:
| Qib | C max | Si max | Mn | P max | S max | Nb sau V | ||
| Qib 11 | A | STKM11A | 0.12 | 0.35 | 0.60 max | 0.040 | 0.040 | - |
| Qib 12 | A | STKM12A | 0.20 | 0.35 | 0.60 max | 0.040 | 0.040 | - |
| B | STKM12B | |||||||
| C | STKM12C | |||||||
| Qib 13 | A | STKM13A | 0.25 | 0.35 | 0.30-0.90 | 0.040 | 0.040 | - |
| B | STKM 13B | |||||||
| C | STKM13C | |||||||
| Qib 14 | A | STKM14A | 0.30 | 0.35 | 0.30-1.00 | 0.040 | 0.040 | - |
| B | STKM 14B | |||||||
| C | STKM14C |
