ASTM A53 Carbon Steel Round Tube
ASTM A53 Carbon Steel Round Tube: Durable and Versatile for Industrial Applications
When sourcing reliable structural and mechanical steel tubing, ASTM A53 carbon steel round tube is a fundamental choice across numerous industries. This specification covers both welded and seamless carbon steel round pipe, available in black and hot-dipped galvanized finishes, suitable for mechanical and pressure applications as well as for ordinary uses in steam, water, gas, and air lines. For projects requiring superior pressure integrity and uniformity, a Seamless Carbon Steel Round Tube is often specified. Alternatively, for cost-effective conveyance of fluids and gases at lower pressures, an ERW Carbon Steel Round Pipe provides an excellent solution. When higher temperature service is a requirement, such as in power generation or process piping, many engineers select ASTM A106 Grade B Round Pipe. For superior corrosion resistance in outdoor or exposed environments, a Galvanized Carbon Steel Round Pipe, coated with a protective layer of zinc, offers extended service life and reduced maintenance.
The ASTM A53 Carbon Steel Round Tube is manufactured in two primary types and three grades to meet diverse application needs. Type S is seamless, produced by piercing a solid billet, resulting in a tube with consistent strength around its circumference. Type E is Electric Resistance Welded (ERW), formed from skelp and welded longitudinally. Type F is furnace-welded, though less common today. The material is offered in Grade A, Grade B, and a Grade B with supplementary requirements for enhanced testing. Grade B is the most widely used, providing higher tensile and yield strength than Grade A, making it suitable for more demanding structural supports, fencing, handrails, and low to medium-pressure fluid systems. The dimensional versatility and reliable mechanical properties of the ASTM A53 Carbon Steel Round Tube ensure it remains a cornerstone material for construction, manufacturing, and infrastructure projects.
Key Specifications & Parameters
- Standard: ASTM A53 / ASME SA53
- Type: Type S (Seamless), Type E (ERW), Type F (Furnace Butt-Welded)
- Grade: Grade A, Grade B
- Material: Carbon Steel
- Process: Hot Finished or Cold Drawn (Seamless), As-Welded or Cold Drawn (ERW)
- Ends: Plain End (PE), Beveled End (BE), Threaded & Coupled (T&C)
- Surface: Black (bare), Hot-Dipped Galvanized (zinc-coated)
- Common Schedules: SCH 40, SCH 80, STD, XS, XXS
Mechanical Properties (Typical)
| Grade | Tensile Strength, min (psi) | Yield Strength, min (psi) | Elongation, min (%) |
|---|---|---|---|
| A53 Grade A | 48,000 | 30,000 | 35.0 (on 2") |
| A53 Grade B | 60,000 | 35,000 | 30.0 (on 2") |
Standard Size Range (NPS)
| Type | Size Range (NPS) | Common Wall Thickness |
|---|---|---|
| A53 Seamless (Type S) | 1/8" to 24" | SCH 10S to SCH XXS |
| A53 ERW (Type E) | 1/8" to 26" | SCH 10 to SCH XXS |
Chemical Composition (%) - Maximum
| Grade | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Copper (Cu)* |
|---|---|---|---|---|---|
| A53 Grade A | 0.25 | 0.95 | 0.05 | 0.045 | 0.40 min |
| A53 Grade B | 0.30 | 1.20 | 0.05 | 0.045 | 0.40 min |
*Copper requirement applies when specified for seamless pipe.
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