Seamless
ASTM A106 Seamless Carbon Steel Pipe
ASTM A106 seamless carbon steel pipe for high-temperature service — Grade A, Grade B, and Grade C for power plants, refineries, process piping, and industrial steam systems.
ASTM A106 seamless pipe
OVERVIEW
The workhorse spec for high-temperature carbon steel pipe.
ASTM A106 is the most widely specified seamless carbon steel pipe standard for high-temperature service worldwide. It covers three grades — A, B, and C — with Grade B accounting for the vast majority of commercial orders. A106 pipe is the default material for process piping in refineries, steam piping in power plants, and high-pressure service in chemical and petrochemical facilities.
Global Seamless manufactures A106 pipe with mandatory silicon content for elevated-temperature strength, hydrostatic testing on every pipe, and Mill Test Certificates to EN 10204 3.1 or 3.2. Dual certification to A106/A53 is available as standard.
✓ Grades: A, B, C
✓ Sizes: NPS 1/2" through NPS 26"
✓ Schedules: 10 through 160, STD, XS, XXS
✓ Service temperature: up to ~425°C
✓ Dual A106/A53 certification available
✓ Sizes: NPS 1/2" through NPS 26"
✓ Schedules: 10 through 160, STD, XS, XXS
✓ Service temperature: up to ~425°C
✓ Dual A106/A53 certification available
ASTM A106 Grade B seamless pipe
DIMENSIONAL SPECIFICATIONS
Available size range.
Cold Drawn Seamless (CDS)
| Grade | Min Yield (MPa) | Min Tensile (MPa) | Max Carbon (%) |
|---|---|---|---|
| Grade A | 205 | 330 | 0.25 |
| Grade B | 240 | 415 | 0.30 |
| Grade C | 275 | 485 | 0.35 |
APPLICATIONS & INDUSTRIES
Where these tubes get used.
MATERIAL GRADES
Grade A · Grade B · Grade C.
GRADE A
Low Carbon
Maximum formability and weldability for bending, flanging, and similar operations.
GRADE B
Standard
The default grade for 90%+ of A106 orders — best balance of strength and weldability.
GRADE C
High Strength
Higher tensile for heavy-wall and high-pressure applications where Grade B is marginal.
TECHNICAL ARTICLES
Latest insights on carbon steel pipe.
ARTICLE
ASTM A106 vs A53 Carbon Pipe
When to specify A106 and when A53 is sufficient.
ARTICLE
Carbon Steel Grade Selection
Matching grade to temperature and pressure conditions.
ARTICLE
High-Pressure Pipe Selection Guide
Choosing seamless pipe for demanding pressure service.
RELATED PRODUCTS
Often paired with.
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