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| Standard Specification | A671 |
| Codes and Standards | ANSI, ASME, ASTM, API, SAE, BS, AGA, AWWA, ISO, DIN |
| Dimensions | ASME/ ANSI B36.10 / 19 |
| Standard Size | 1/2” NB to 36” NB (EFW) |
| Wall Thickness | 3-12mm |
| Pipe schedules | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Producing techniques | EFW / ERW / Welded / Fabricated |
| Available Shapes | Round, Half Round, Square, Rectangular or Custom shape |
| Length | 3 to Max18 Meters or custom |
| Pipe End | Beveled End, Plain End, Treaded |
| Test Certificate | EN 10204 3.1 B |
| A671 Grade | Chemical composition | |||||
| C | Si | Mn | P | S | Ti | |
| -/A45 | -/0.17 | – | 0.98 | 0.035 | 0.035 | – |
| -/A50 | -/0.22 | – | ||||
| CA55 / A55 | 0.28 | – | ||||
| -/B55 | -/0.20 | 0.13 ~0.45 | ||||
| CB60 / B60 | 0.24 | |||||
| CB65 / B65 | 0.28 | |||||
| CB70 / C70 | 0.31 | 1.30 | ||||
| -/C55 | -/0.18 | 0.55 ~0.98 | ||||
| CC60/ C60 | 0.21 | |||||
| CC65 / C65 | 0.24 | 0.79 ~1.30 | ||||
| CC70 / C70 | 0.27 | |||||
| Grades | Yield Strength (N/mm2) | Tensile Properties (N/mm2) | Elongation (%) | Welding point tensile strength (N/mm2) |
| -/A45 | -/165 | -/310~450 | -/30 | -/310~450 |
| -/A50 | -/185 | -/345~485 | -/28 | -/345~485 |
| CA55 / A55 | 205 | 380~515 | 27 | 380~515 |
| -/B55 | -/205 | -/380~515 | -/27 | -/380~515 |
| CB60 / B60 | 220 | 415~550 | 25 | 415~550 |
| CB65 / B65 | 240 | 450~585 | 23 | 450~585 |
| CB70 / C70 | 260 | 485~620 | 21 | 485~620 |
| -/C55 | -/205 | -/380~515 | -/27 | -/380~515 |
| CC60/ C60 | 220 | 415~550 | 25 | 415~550 |
| CC65 / C65 | 240 | 450~585 | 23 | 450~585 |
| CC70 / C70 | 260 | 485~620 | 21 | 485~620 |
| ASTM A671 Low Temp Pipes | EFW Black A671 CS Pipes |
| ASTM A671 Grade Welded Pipes | Low CS ASTM A671 Oval Pipes |
| ASTM A671 Gr Erw Pipes | A671 Grade CS Casing Pipe |
| Carbon Steel ASTM A671 Schedule 40 Pipes | ASME B36.19 Low Carbon Steel ASTM A671 Grade Pipes |
| A671 CS Schedule 10 Pipes | A671 Double Wall Pipes |
| Low CS ASTM A671 Efw Pipes | Epoxy lined ASTM A671 Grade Pipes |
| A671 Grade CS Round Pipes | PTFE lined A671 Grade CS Natural Gas Pipes |
| Low Carbon Steel ASTM A671 Grade Drill Pipes | Carbon Steel ASTM A671 Grooved Pipes |
| Grades | Material | ASTM Spec | |
| No. | Grades and Classes | ||
| CA55 | plain carbon | A285/A285M | Gr C |
| CB60 | carbon steel (plain / killed) | A515/A515M | Gr 60 |
| CB65 | carbon steel (plain / killed) | A515/A515M | Gr 65 |
| CB70 | carbon steel (plain / killed) | A515/A515M | Gr 70 |
| CC60 | carbon steel (plain / killed), fine grain | A516/A516M | Gr 60 |
| CC65 | carbon steel (plain / killed), fine grain | A516/A516M | Gr 65 |
| CC70 | carbon steel (plain / killed), fine grain | A516/A516M | Gr 70 |
| CD70 | manganese-silicon, normalized | A537/A537M | Cl 1 |
| CD80 | manganese-silicon, quenched and tempered | A537/A537M | Cl 2 |
| CK 75 | carbon-manganese-silicon | A299/A299M | Gr A |
| CP 85 | alloy steel, quenched, age hardening, precipitation heat treated | A736/A736M | Gr A, Class 3 |
| CFA 65 | nickel steel | A203/A203M | Gr A |
| CFB 70 | nickel steel | A203/A203M | Gr B |
| CFD 65 | nickel steel | A203/A203M | Gr D |
| CFE 70 | nickel steel | A203/A203M | Gr E |
| CG 100 | 9% nickel | A353/A353M | |
| CH 115 | 9% nickel | A553/A553M | Type 1 |
| CJA 115 | alloy steel (AS), quenched and tempered | A517/A517M | Gr A |
| CJB 115 | alloy steel (AS), quenched and tempered | A517/A517M | Gr B |
| CJE 115 | alloy steel (AS), quenched and tempered | A517/A517M | Gr E |
| CJF 115 | alloy steel (AS), quenched and tempered | A517/A517M | Gr F |
| CJH 115 | alloy steel (AS), quenched and tempered | A517/A517M | Gr H |
| CJP 115 | alloy steel (AS), quenched and tempered | A517/A517M | Gr P |
