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Carbon Steel A53 Gr B Pipe & Tube is a widely used material in industrial and construction applications due to its excellent strength, durability, and versatility. Manufactured according to ASTM A53 standards, these pipes and tubes are designed to withstand high pressure, temperature, and mechanical stress, making them suitable for structural, plumbing, and piping systems. Available in both seamless and welded forms, A53 Gr B ensures reliable performance across a variety of industries.
A53 Gr B pipes are made from carbon steel with controlled levels of carbon, manganese, phosphorus, and sulfur. This chemical composition provides an ideal balance of strength and flexibility. The moderate carbon content allows the steel to be easily welded and formed into various shapes without compromising its mechanical properties. The material is suitable for both hot and cold bending processes, making it highly adaptable for different engineering requirements.
ASTM A53 / ASME SA53 covers seamless and welded black and hot-dipped galvanized steel pipes. The specification includes two grades—Grade A and Grade B—with Grade B being the most commonly used due to its higher strength and mechanical performance. These pipes are available in Type E (Electric Resistance Welded), Type S (Seamless), and Type F (Furnace Welded) forms to meet diverse industrial needs.
Carbon Steel A53 Grade B pipes are composed primarily of Carbon (0.30% max), Manganese (1.20% max), Phosphorus (0.05% max), Sulfur (0.045% max), and Copper (0.40% max, optional). This controlled composition ensures excellent machinability, weldability, and corrosion resistance. The low carbon content contributes to ductility and easy fabrication, making it ideal for forming and bending applications.
Carbon Steel A53 Gr B pipes and tubes offer superior mechanical properties such as high tensile strength, yield strength, and elongation. These properties make them ideal for applications that require resistance to internal pressure and structural loads. The pipes maintain their integrity under high-stress conditions, ensuring long-lasting service life in demanding environments such as oil, gas, and chemical industries.
A53 Gr B pipes and tubes are extensively used in water, gas, and steam transportation systems, as well as in structural frameworks, scaffolding, and mechanical equipment. They are also employed in power plants, refineries, and industrial projects where high pressure and temperature resistance is critical. Their seamless and welded variants provide flexibility for different project specifications and installation requirements.
A53 Gr. B pipes exhibit excellent mechanical strength and toughness, with a minimum tensile strength of 415 MPa and a minimum yield strength of 240 MPa. These pipes offer superior impact resistance and flexibility under pressure, ensuring consistent performance in both ambient and elevated temperatures. Their ability to withstand internal pressure makes them ideal for steam, gas, and fluid transportation systems.
The manufacturing of Carbon Steel A53 Gr. B pipes involves either seamless hot-forming or electric resistance welding processes. Seamless pipes are produced by hot working and cold finishing methods, while welded pipes are manufactured by joining steel plates or coils using advanced welding techniques. Post-manufacturing, the pipes undergo hydrostatic testing and nondestructive inspections to ensure reliability and leak-proof performance.
Specification Table
| Specification | Details |
|---|---|
| Material | Carbon Steel |
| Grade | A53 Gr B |
| Standard | ASTM A53 / ASME SA53 |
| Type | Seamless & Welded |
| Size Range | 1/2" to 24" (DN15 to DN600) |
| Wall Thickness | Schedule 10 to Schedule 160 |
| Length | Single random, double random, or cut to size |
| Applications | Water, Gas, Steam, Structural, Industrial Piping |
| End Finish | Plain ends, Threaded ends, Beveled ends |
| Certification | ASTM A53 / ISO / EN / Customer Requirement |
Chemical Composition (Typical ranges for SSS32760)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.25 max |
| Manganese (Mn) | 0.95 max |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.05 max |
| Silicon (Si) | 0.10 – 0.35 |
Mechanical Properties (Typical)
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 415 min |
| Yield Strength (MPa) | 205 min |
| Elongation (%) | 25 min (for diameter ≤ 8") 23 min (for diameter > 8") |
| Hardness (HB) | ≤ 187 |
| Impact Test | Not required for Grade B pipes |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM A53 | Grade B |
| ASME SA53 | Grade B |
| EN 10220 / EN 10216-1 | St35.8 / P235 |
| DIN 1626 / DIN 17175 | St35.8 / 17Mo3 |
| JIS G 3452 | STPG 370 |
| API 5L | Grade B |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Nominal Pipe Size (NPS) | Outside Diameter (OD) mm | Schedule | Wall Thickness (mm) | Weight per Meter (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.3 | 10 | 2.77 | 1.66 |
| 3/4" | 26.7 | 10 | 2.87 | 2.22 |
| 1" | 33.4 | 10 | 3.38 | 3.01 |
| 1 1/4" | 42.2 | 10 | 3.56 | 4.19 |
| 1 1/2" | 48.3 | 10 | 3.68 | 5.14 |
| 2" | 60.3 | 10 | 3.91 | 6.70 |
| 2 1/2" | 73.0 | 10 | 4.19 | 8.91 |
| 3" | 88.9 | 10 | 4.55 | 11.9 |
| 4" | 114.3 | 10 | 4.78 | 16.9 |
| 6" | 168.3 | 10 | 5.54 | 27.8 |
| 8" | 219.1 | 10 | 6.02 | 42.2 |
| 10" | 273.0 | 10 | 6.55 | 60.7 |
| 12" | 323.9 | 10 | 7.11 | 84.2 |
Types Of Carbon Steel A53 Gr B Pipe & Tubes
SS S32760 Seamless Pipe
SS S32760 Welded Pipe
SS S32760 ERW Pipe
SS S32760S EFW Pipe
Carbon Steel A53 Gr BS Seamless Tube
S32760H Super Duplex Steel Welded Tube
S32760 Super Duplex Steel Capillary Tube
S32760H Super Duplex Steel Heat Exchanger Tubes
Frequently Asked Questions (FAQ)
Q1: What is Carbon Steel A53 Gr B Pipe?
A1: Carbon Steel A53 Gr B Pipe is a high-quality steel pipe manufactured according to ASTM A53 standards. It is widely used in industrial, construction, and mechanical applications for its durability, strength, and versatility.
Q2: What types of A53 Gr B Pipes are available?
A2: A53 Gr B Pipes are available in both seamless and welded forms. Seamless pipes are ideal for high-pressure applications, while welded pipes are suitable for structural and low-to-medium pressure systems.
Q3: What are the typical applications of A53 Gr B Pipes?
A3: These pipes are used for water, gas, and steam transportation, structural applications, scaffolding, power plants, refineries, and other industrial projects requiring high pressure and temperature resistance.
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