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About carbon steel welded pipe, there is a kind poeple called MS pipe, which is means pipes made from mild steel/low carbon steel(carbon steel that carbon content lower than 0.25%). This kind pipe is most common, mostly be used in construction structure, scaffold and so on. This kind pipe is relatively soft, can't bear to much strength and pressure, so also can be used in low pressure liquid transport. Because this kind steel has a low mechanical property, won't be used in the usage scenario that has high requirement, so when people mention MS pipe, always means welded pipe.
It Is Mainly Used for force and pressure parts, and for general purpose steam, water, gas and air pipes.
GR.A, GR.B
|
Grade |
Component %，≤ | ||||||||
| C | Mn | P | S |
CuA |
NiA |
CrA |
MoA | VA | |
| S type（seamless pipe） | |||||||||
| GR.A | 0.25B | 0.95 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| GR.B | 0.30C | 1.20 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| E type（Resistance welded pipe） | |||||||||
| GR.A | 0.25B | 0.95 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| GR.B | 0.30C | 1.20 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| F type（Furnace Welded Pipe） | |||||||||
| A | 0.30B | 1.20 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
A The sum of these five elements must not be greater than 1.00%。
B For every 0.01% decrease in the maximum carbon content, the maximum manganese content is allowed to increase by 0.06%, but the maximum cannot exceed 1.35%.
C Each 0.01% decrease in the maximum carbon content will allow the maximum manganese content to increase by 0.06%, but the maximum must not exceed 1.65%.
| item | GR.A | GR.B |
|
tensile strength, ≥, psi [MPa] Yield Strength, ≥, psi [MPa] Gauge 2in.or 50mm elongation |
48 000 [330]30 000 [205]A,B | 60 000 [415]35 000 [240]A,B |
A The minimum elongation of gauge length 2in. (50mm) shall be determined by the following formula：
e=625000(1940)A0.2/U0.9
e = the minimum elongation of the gauge 2in. (50mm), the percentage rounded to the nearest 0.5%;
A = Calculated according to the specified outer diameter of the nominal tube or the nominal width of the tensile sample and its specified wall thickness, and rounded to the nearest cross-sectional area of the tensile sample of 0.01 in.2 (1 mm2), and It is compared with 0.75in.2 (500mm2), whichever is smaller.
U = specified minimum tensile strength, psi (MPa).
B For various combinations of different sizes of tensile test specimens and prescribed minimum tensile strength, the required minimum elongation is shown in Table X4.1 or Table X4.2, according to its applicability.
Tensile test, bending test, hydrostatic test, nondestructive electrical test of welds.
Supply Ability: 2000 Tons Per Month Per Grade Of ASTM A53/A53M-2012 Steel Pipe
In Bundles And In Strong Wooden Box
7-14 days if in stock, 30-45 days to produce
30% depsoit, 70% L/C or B/L copy or 100% L/C at sight