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ASTM A106 is the standard specification for seamless carbon steel pipe applied for high temperature services.
This specification covers seamless carbon steel pipe for high-temperature service (Note 1) in NPS 1/8 to NPS 48 inclusive, with nominal (average) wall thickness as given is ANSI B36.10. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification. Pipe ordered under this specification shall be suitable for bending, flanging, and similar forming operations, and for welding. When the steel is to be welded, it is presupposed that a welding procedure suitable to the grade of steel and intended use or service will be utilized (Note 2).
NOTE 1 Α Consideration should be given to possible graphitization of the material at the higer temperatures at which it may be used.
NOTE 2 Α Grades A rather than Grades B or Grades C pipe should be used for close coiling, or cold bending. The purpose for which the pipe is to be used should be stated in the order. This note is not intended to prohibit the cold bending of Grades B seamless pipe.
Supplementary requirements (S1 to S4) of an optional nature are provided for seamless pipe intended for use in applications where a superior grade of pipe is required. These supplementary requirements call for additional tests to be made and when desired shall be so stated in the order.
When these products are to be used in applications conforming to ISO Recommendations for Boiler Construction, the requirements of Specification A 520 (Mechanical Property Requirements Section) shall supplement and supersede the requirements of this specification. 1.4 The values stated in inch-pound units are to be regarded as the standard.
NOTE 3 Α The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter”, “size”, and “nominal size”.
The following precautionary caveat pertains only to the test method portion, Sections 11, 12, 13, 14, and 15, of this specification; This standard does not purport to address all of the safety problem, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM A106 Gr.B Pipes
The Astm A106 Grade B Carbon Steel Pipe can be described as a standard specification for pipes that are used in high temperature services. These pipes are available in both hot and cold finishes. The A106 Grade B Seamless Pipe comes with high weldability, bendability, and it can also be flanged easily.
ASTM A106 Seamless carbon steel tube for high temperature service
The ASTM A106 Gr B Sch 40 can be customized in terms of their shape, size, dimensions and surface finishes, according to the requirements specified by the clients.
Chemical composition (%) of ASTM A106
| Grade | C≤ | Mn | P≤ | S≤ | Si≥ | Cr≤ | Cu≤ | Mo≤ | Ni≤ | V≤ |
|---|---|---|---|---|---|---|---|---|---|---|
| ASTM A106 GradeA | 0.25 | 0.27-0.93 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
| ASTM A106 GradeB | 0.3 | 0.29-1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
| ASTM A106 GradeC | 0.35 | 0.29-1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
Mechanical properties of ASTM A106
| Grade | Rm Mpa Tensile Strength | Yield Point (Mpa) | Elongation | Delivery Condition |
|---|---|---|---|---|
| ASTM A106 GradeA | ≥330 | ≥205 | 20 | Annealed |
| ASTM A106 GradeB | ≥415 | ≥240 | 20 | Annealed |
| ASTM A106 GradeC | ≥485 | ≥275 | 20 | Annealed |
| JIS | ASTM | BS | DIN | NF | ISO | Index Number | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Std.No | Grade | Type | Std.No | Grade | Type | Std.No | Grade | Type | Std.No | Grade | Type | Std.No | Grade | Type | Std.No | Grade | Type | |
| JIS G3456 | STPT370 | C | ASTM A106 | GrA | C | 3602 | HFS360 | C | 17175 | St35.8 | C | A49-211 | TU37b | C | 2604-02-01 00:00:00 | TS5 | C | C004 |
| (STPT38) | " | CFS360 | C | 17177 | St37.8 | C | A49-213 | TU37c | C | 2604-03-01 00:00:00 | TW9H | C | ||||||
| " | ERW360 | C | A49-243 | TU37c | C | |||||||||||||
| " | CEW360 | C | ||||||||||||||||
| STPT410 | C | ASTM A106 | GrB | C | 3602 | HFS410 | C | 17175 | St45.8 | C | A49-211 | TU42b | C | 2604-02-01 00:00:00 | TS9H | C | ||
| (STPT42) | " | CFS410 | C | 17177 | St42.8 | C | A49-213 | TU42c | C | |||||||||
| " | ERW410 | C | A49-243 | TU42c | C | |||||||||||||
| " | CEEW410 | C | ||||||||||||||||
| STPT480 | C | ASTM A106 | GrC | C | 3602 | HFS460 | C | A49-211 | TU48b | C | 2604-02-01 00:00:00 | TS14 | C | |||||
| (STPT42) | " | CFS460 | C | A49-213 | TU48c | C | ||||||||||||
| " | ERW460 | C | ||||||||||||||||
| " | CEEW460 | C | ||||||||||||||||
Lengths
Lengths required shall be specified on order. No “jointers” permitted unless otherwise specified. If no definite lengths required, following practice applies: Single Random — 17′ ~ 24′ lengths Double Random — 36′ ~ 44′ lengths
Required Markings on Each Length
(On Tags attached to each Bundle in case of Bundled Pipe) Rolled, Stamped, or Stenciled (Mfrs. Option) Manufacturer’s name or brand. Length of pipe. A106 A, A 106 B, A 106 C. ANSI schedule number. Hydrostatic test pressures and/or NDE; Weight per foot (NPS 4 and larger) or NH if neither is specified. Additional “S” if tested supplementary requirements.
Referenced Documents
- ASTM A 530/A 530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
- ASTM E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing
- ASTM E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation
- ASTM E 381 Method of Macroetch testing Steel Bars, Billets, Blooms, and Forgings
- ASTM E 570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
- ASME B36.10M Welded and Seamless Wrought Steel Pipe
