Manyleb safonol ASTM A672 ar gyfer pibell ddur weldio ymasiad trydan ar gyfer gwasanaeth pwysedd uchel ar dymheredd cymedrol.
Gofynion Cemegol ASTM A672 :
| Manyleb | Gradd dur | Cyfansoddiad cemegol | Sylwadau | |||||
| C | Os | Mn | P | S | Ti | |||
| Pibellau ar gyfer gwasanaeth pwysau ASTM A671, A672 |
-/A45 | -/0.17 | - | 0.98 | 0.035 | 0.035 | - | A671/ A672 |
| -/A50 | -/0.22 | - | ||||||
| CA55% 2fA55 | 0.28 | - | ||||||
| -/B55 | -/0.20 | 0.13 ~0.45 |
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| CB60% 2fB60 | 0.24 | |||||||
| CB65% 2fB65 | 0.28 | |||||||
| CB70% 2fC70 | 0.31 | 1.30 | ||||||
| -/C55 | -/0.18 | 0.55 ~0.98 |
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| CC60% 2fC60 | 0.21 | |||||||
| CC65% 2fC65 | 0.24 | 0.79 ~1.30 |
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| CC70% 2fC70 | 0.27 | |||||||
Priodweddau Mecanyddol ASTM A672:
| Cynhyrchion | Gradd Dur | CYFANSODDIAD MECANYDDOL METEL SYLFAENOL | Cryfder tynnol pwynt weldio (N/mm2) | Sylwadau | |||
| Pwynt cynnyrch (N/mm2) | Cryfder Tynnol (N/mm2) | Darnau Prawf | elongation (%) | ||||
| Pibellau ar gyfer gwasanaeth pwysau ASTM A671, A672 | -/A45 | -/165 | -/310~450 | - | -/30 | -/310~450 | A671/ A672 |
| -/A50 | -/185 | -/345~485 | -/28 | -/345~485 | |||
| CA55% 2fA55 | 205 | 380~515 | 27 | 380~515 | |||
| -/B55 | -/205 | -/380~515 | -/27 | -/380~515 | |||
| CB60% 2fB60 | 220 | 415~550 | 25 | 415~550 | |||
| CB65% 2fB65 | 240 | 450~585 | 23 | 450~585 | |||
| CB70/B70 | 260 | 485~620 | 21 | 485~620 | |||
| -/C55 | -/205 | -/380~515 | -/27 | -/380~515 | |||
| CC60% 2fC60 | 220 | 415~550 | 25 | 415~550 | |||
| CC65% 2fC65 | 240 | 450~585 | 23 | 450~585 | |||
| CC70% 2fC70 | 260 | 485~620 | 21 | 485~620 | |||
