ASTM A178 Carbon Steel Tubes: Essential Specifications and Applications
The ASTM A178 standard outlines the requirements for resistance-welded steel tubes, primarily intended for use in high-pressure environments such as boiler systems. These tubes are manufactured using either carbon steel or carbon-manganese steel, making them suitable for critical applications including boiler tubes, boiler flues, superheater flues, and safety components. Depending on the specific needs, these tubes can be produced from three primary steel grades: Grade A (low-carbon steel), Grade C (medium-carbon steel), or Grade D (carbon-manganese steel).
Manufacturing processes for ASTM A178 tubes involve rigorous steps, including heat treatment, controlled cooling, and precise welding techniques. In some cases, customers may request additional testing, such as a crushing test, to ensure the structural integrity of the tubes.
At CSC Steel, we specialize in exporting various types of ERW (Electric Resistance Welded) pipes and tubes. Our offerings include tubes in diverse sizes, shapes, and finishes, such as black finish, bare tubes, or those with protective coatings. Additionally, we provide ERW tubes in other popular steel grades, including ASTM A53 Structural Pipe, API 5L Line Pipe, and ASTM A252 Piling Pipe.
Our focus at CSC Steel is delivering high-quality ASTM A178 ERW tubes tailored for precision applications in boilers, superheaters, and heat exchangers. If your project requires specialized tubing solutions, our Boiler Tube and Pipe Products section provides further details, or feel free to reach out for a customized quote.
### Chemical Composition of ASTM A178 ERW Tubes:
| Steel Grade | Element | Chemical Composition (%) |
|-------------|---------------|--------------------------|
| ASTM A178 | Carbon | Grade A: 0.06-0.18 |
| | | Grade C: ≤0.35 |
| | | Grade D: ≤0.27 |
| | Manganese | Grade A: 0.27-0.63 |
| | | Grade C: ≤0.80 |
| | | Grade D: 1.00-1.50 |
| | Phosphorus | ≤0.035 |
| | Sulfur | ≤0.035 (Grade A/C) |
| | | ≤0.015 (Grade D) |
| | Silicon | Not specified |
### Crush Test Requirements:
| Steel Grade | Wall Thickness (in/mm) | Crush Height (in/mm) |
|-------------|-------------------------|----------------------|
| ASTM A178 | ≤0.135 [3.43] | Grade A: 3/4 [19] |
| | | Grade C/D: No Test |
| | >0.135 [3.43] | Grade A: 1 1/4 [32] |
### Mechanical Properties:
| ASTM A178 | Grade C | Grade D |
|-------------|------------------|------------------|
| Tensile Strength (ksi/MPa) | ≥255 [≥1757] | ≥275 [≥1895] |
| Yield Strength (ksi/MPa) | ≥415 [≥2861] | ≥485 [≥3343] |
| Elongation (%) | ≥30 | ≥30 |
### Comparison with Other Standards:
| ASTM Standard | UNS No. | Korea/Japan | German | British | Belgian | French | Italian |
|------------------------------|---------------|-------------|-------------|-------------|-------------|-------------|-------------|
| ASTM A178 C-Steel Tubes | K01200 | STBH 340 | St 37.8 | ERW 320 | N/A | TS34e | TS34c |
| Grade A | | D3563/G3461 | 1.0315 | B.S. 3059 | N/A | AFNOR | UNI |
### JIS Numbers and Corresponding Foreign Standards:
| JIS Number | Grade | Type | ASTM Number | Grade | Type | BS Number | Grade | Type | DIN Number | Type | NF Number | Type | ISO Number | Type | Index No. |
|------------|------------|------|-------------|---------|------|-----------|---------|------|------------|------|-----------|------|------------|------|-----------|
| G3461 | STB340 | C | A161 | LC | C | 3059 | HFS320 | C | N/A | N/A | A49-245 | TS34e| N/A | N/A | C010 |
This comprehensive overview highlights the versatility and robustness of ASTM A178 tubes, ensuring they meet the stringent demands of industrial applications worldwide. Whether for power plants, petrochemical facilities, or any high-pressure environment, these tubes provide unmatched reliability and performance. For more information or to place an order, please visit our website or contact us directly.
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