ASTM A139 grade C welded steel pipe Surface treatment
ASTM A139 grade C steel pipe is intended for conveying gas, vapor, water or other liquid; only Grade A is adapted for flanging and bending.
A139 grade C chemical composition
| Element | Carbon | Manganese | Phosphorus | Sulfur |
| Grade C | 0.28 | 1.20 | 0.035 | 0.035 |
ASTM A139 grade C steel pipe mechanical properties
| Grade C | |
| Tensile strength, min, ksi (MPa) | 60 (415) |
| Yield strength, min, ksi (MPa) | 42(290) |
| Elongation in 2 in. or 50 mm, min, %: | |
| Basic minimum elongation for walls5 ⁄16in. (7.9 mm) and over in | 25 |
| thickness, longitudinal strip tests | |
| For longitudinal strips tests, a deduction for each1 ⁄32-in. (0.8-mm) | 1.25 |
| Elongation in 8 in. (203.2 mm), in min, % C | 1 500 000 specified tensile strength (psi) |
ERW; outer diameter:21.3-660mm thickness:6-25mm
LSAW; outer diameter:325-1524mm thickness:6-50mm
SSAW: outer diameter:219-3200mm thickness:5-25mm
ASTM A139 grade C steel pipe Surface treatment:
Black painting
Varnish painting
3PE
Hot galvanized
or other coating according to your requirements
Bare tube
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