Grade A, Grade C, or Grade D
OD: 1/2 to 5 in. [12.7 to 127 mm]
WT:0.035 to 0.360 in. [0.9 to 9.1 mm]
The steel shall be of Grades A (low-carbon steel), C (medium-carbon steel), or D (carbon-manganese steel). All tubes shall be submitted to heat treatment after welding, followed by cooling. The steel shall conform to stated compositions of carbon, manganese, phosphorus, sulphur, and silicon. Grades C and D shall conform to given tensile requirements, that is tensile strength, yield strength, and elongation.
Type: ERW/Welded/Fabricated/CDR
Form: Round pipe/tube. Square pipe/tube . Rectangle pipe/tubes
End:Plain/Beveled End Protection : Plastic cap
Outside Coating : Black Painting. Anti-Corrosion Oil. Galvanised finish . finished as per custom requirement .
Chemical Composition
Element | Composition % | ||
Gr A(low-carbon steel) | Gr B(medium-carbon steel) | Gr D(C-Mn steel) | |
C | 0.06-0.18 | 0.35 | 0.27 |
Mn | 0.27-0.63 | 0.8 | 1-1.5 |
p | 0.035 | 0.035 | 0.03 |
S | 0.035 | 0.035 | 0.015 |
Si | ... | ... | 0.1 min |
Mechanical Properties
Gr C | Gr D | |
Tensile strength min ksi [MPa] | 60[415] | 70[455] |
Yield strength min ksi [MPa] | 37[255] | 40[275] |
Elonation in 2in % | 30 | 30 |
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