Il-pajp mekkaniku JIS G3445 huwa tip ta 'pajp tal-azzar tal-karbonju għal struttura mekkanika. L-istandard ta 'implimentazzjoni huwa JIS G344512.
Il-pajp mekkaniku JIS G3445 jintuża prinċipalment f'oqsma bħal makkinarju, karozzi, roti, għamara, apparat u partijiet mekkaniċi oħra2.
Il-gradi ewlenin tal-pajpijiet tal-azzar prodotti minn pajpijiet mekkaniċi JIS G3445 huma STKM11A, STKM12 (A, B, C), STKM (A, B, C), eċċ.
JIS G3445 Analiżi Kimika:
| Grad | C massimu | Si massimu | Mn | P massimu | S massimu | Nb jew V | ||
| Grad 11 | A | STKM11A | 0.12 | 0.35 | 0.60 max | 0.040 | 0.040 | - |
| Grad 12 | A | STKM12A | 0.20 | 0.35 | 0.60 max | 0.040 | 0.040 | - |
| B | STKM12B | |||||||
| C | STKM12C | |||||||
| Grad 13 | A | STKM13A | 0.25 | 0.35 | 0.30-0.90 | 0.040 | 0.040 | - |
| B | STKM13B | |||||||
| C | STKM13C | |||||||
| Grad 14 | A | STKM14A | 0.30 | 0.35 | 0.30-1.00 | 0.040 | 0.040 | - |
| B | STKM14B | |||||||
| C | STKM14C |
