Is píopa cruach carbóin agus cóimhiotail táthaithe frithsheasmhachta leictreach é ASTM A513 Píob Mheicniúil Alloy a úsáidtear i bpíopaí meicniúla. Clúdaíonn sé píopaí meicniúla déanta as cruach te-rollta nó fuar-rollta agus folaíonn sé píopaí cruinne, cearnacha, dronuilleogacha agus cruth speisialta.
Comhdhéanamh ceimiceach Feadáin Cruach Mheicniúil ASTM A513:
| Grád | Comhdhéanamh. % | |||||||
| C | Mn. uas | P, uas | S | Si | Ni | Cr | Mo | |
| 1008 | 0.10 uas. | 0.50 uas | 0.035 | 0.035 | ... | .... | ... | ... |
| 1010 | 0.08-0.13 | 0.30-0.60 | 0.035 | 0.035 | ... | ... | ... | ... |
| 1018 | 0.14-0.20 | 0.60-0.90 | 0.035 | 0.035 | ... | ... | ... | ... |
| 1020 | 0.17-0.23 | 0.30-0.60 | 0.035 | 0.035 | ... | ... | ... | ... |
| 1025 | 0.22-0.28 | 0.30-0.60 | 0.035 | 0.035 | ... | ... | ... | ... |
| 1026 | 0.22-0.28 | 0.60-0.90 | 0.035 | 0.035 | ... | ... | ... | ... |
| 1524 | 0.18-0.25 | 1.35-1.65 | 0.04 | 0.05 | ... | ... | ... | ... |
| 4130 | 0.28-0.33 | 0.40-0.60 | 0.035 | 0.04 | 0.15-0.35 | ... | 0.80-1.10 | 0.15-0.25 |
| 4140 | 0.38-0.43 | 0.75-1.00 | 0.035 | 0.04 | 0.15-0.35 | ... | 0.80-1.10 | 0.15-0.25 |
Feadánra ERW as Cruach Te-Rollta:
OD: 1/2" - 15" (12.7 - 380mm)
WT: 0.065" - 0.650" (1.65 - 16.5mm)
Feadánra ERW ó Chruach Iarchurtha:
OD: 3/8" - 12" (9.5 - 300mm)
WT: {{0}}.022" - 0.134" (0.56 - 3.40mm)
