ASTM A106 / A106M Standard Specification

ASTM A106 / A106M – 11 Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Servicein 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.

Steel pipe features specifications

O.D.(mm)	Wall Thickness Unit(mm)
	2	2.5	3	3.5	4	4.5	5	6	6.5-7	7.5-8	8.5-9	9.5-10	11	12
Φ25-Φ28	●	●	●	●	●	●
Φ32		●	●	●	●	●	●
Φ34-Φ36		●	●	●	●	●	●
Φ38		●	●	●	●	●	●
Φ40			●	●	●	●	●
Φ42			●	●	●	●	●
Φ45			●	●	●	●	●	●
Φ48-Φ60			●	●	●	●	●	●	●
Φ63.5				●	●	●	●	●	●	●
Φ68-Φ73					●	●	●	●	●	●
Φ76					●	●	●	●	●	●	●	●	●	●
Φ80					●	●	●	●	●	●	●	●	●	●
Φ83					●	●	●	●	●	●	●	●	●	●
Φ89					●	●	●	●	●	●	●	●	●	●
Φ95					●	●	●	●	●	●	●	●	●	●
Φ102					●	●	●	●	●	●	●	●	●	●
Φ108					●	●	●	●	●	●	●	●	●	●
Φ114						●	●	●	●	●	●	●	●	●
Φ121						●	●	●	●	●	●	●	●	●
Φ127						●	●	●	●	●	●	●	●	●
Φ133						●	●	●	●	●	●	●	●	●
Φ140							●	●	●	●	●	●	●	●
Φ146							●	●	●	●	●	●	●	●
Φ152							●	●	●	●	●	●	●	●
Φ159							●	●	●	●	●	●	●	●
Φ168							●	●	●	●	●	●	●	●

ASTM A106 (ASME SA106) Grade and Chemical Composition (%)

Grade	C≤	Mn	P≤	S≤	Si≥	Cr≤	Cu≤	Mo≤	Ni≤	V≤
A	0.25	0.27-0.93	0.035	0.035	0.1	0.4	0.4	0.15	0.4	0.08
B	0.3	0.29-1.06	0.035	0.035	0.1	0.4	0.4	0.15	0.4	0.08
C	0.35	0.29-1.06	0.035	0.035	0.1	0.4	0.4	0.15	0.4	0.08

ASTM A106 (ASME SA106) Mechanical Properties

Grade	Rm Mpa Tensile Strength	Yield Point (Mpa)	Elongation	Delivery Condition
A	≥330	≥205	20	Annealed
B	≥415	≥240	20	Annealed
C	≥485	≥275	20	Annealed

ASTM A106 (ASME SA106) Dimension Tolerances

Pipe Type	Pipe Sizes		Tolerances
Cold Drawn	OD	≤48.3mm	±0.40mm
		≥60.3mm	±1%mm
	WT		±12.5%

JIS Number and Corrensponding Foreign Standards

	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
G3456	STPT370 (STPT38)	C	A106	GrA	C	3602	HFS360	C	17175	St35.8	C	A49-211	TU37b	C	2604-02-01 00:00:00	TS5	C	C004
						"	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 (STPT42)	C	A106	GrB	C	3602	HFS410	C	17175	St45.8	C	A49-211	TU42b	C	2604-02-01 00:00:00	TS9H	C
						"	CFS410	C	17177	St42.8	C	A49-213	TU42c	C
						"	ERW410	C				A49-243	TU42c	C
						"	CEEW410	C
	STPT480 (STPT42)	C	A106	GrC	C	3602	HFS460	C				A49-211	TU48b	C	2604-02-01 00:00:00	TS14	C
						"	CFS460	C				A49-213	TU48c	C
						"	ERW460	C
						"	CEEW460	C

Nominal wall thickness for ASTM A106(Seamless and welded steel pipes)

NPS (in)	Outside Diameter (in)
ASTM A106 Grade B Pipe Schedule		SCH 10	SCH 20	SCH 30	SCH STD	SCH 40	SCH 60	SCH XS	SCH 80	SCH 100	SCH 120	SCH 140	SCH 160	SCH XXS
Wall Thickness (in)
1/8	0.405				0.068	0.068		0.095	0.095
1/4	0.54				0.088	0.088		0.119	0.119
3/8	0.675				0.091	0.091		0.126	0.126
1/2	0.84				0.109	0.109		0.147	0.147				0.187	0.294
3/4	1.05				0.113	0.113		0.154	0.154				0.219	0.308
1	1.315				0.133	0.133		0.179	0.179				0.25	0.358
1.25	1.66				0.14	0.14		0.191	0.191				0.25	0.382
1.5	1.9				0.145	0.145		0.2	0.2				0.281	0.4
2	2.375				0.154	0.154		0.218	0.218				0.344	0.436
2.5	2.875				0.203	0.203		0.276	0.276				0.375	0.552
3	3.5				0.216	0.216		0.3	0.3				0.438	0.6
3.5	4				0.226	0.226		0.318	0.318
4	4.5				0.237	0.237		0.337	0.337		0.438		0.531	0.674
5	5.563				0.258	0.258		0.375	0.375		0.5		0.625	0.75
6	6.625				0.28	0.28		0.432	0.432		0.562		0.719	0.864
8	8.625		0.25	0.277	0.322	0.322	0.406	0.5	0.5	0.594	0.719	0.812	0.906	0.875
10	10.75		0.25	0.307	0.365	0.365	0.5	0.5	0.594	0.719	0.844	1	1.125	1
12	12.75		0.25	0.33	0.375	0.406	0.562	0.5	0.688	0.844	1	1.125	1.312	1
14	14	0.25	0.312	0.375	0.375	0.438	0.594	0.5	0.75	0.938	1.094	1.25	1.406
16	16	0.25	0.312	0.375	0.375	0.5	0.656	0.5	0.844	1.031	1.219	1.438	1.594
18	18	0.25	0.312	0.438	0.375	0.562	0.75	0.5	0.938	1.156	1.375	1.562	1.781
20	20	0.25	0.375	0.5	0.375	0.594	0.812	0.5	1.031	1.281	1.5	1.75	1.969
22	22	0.25	0.375	0.5	0.375		0.875	0.5	1.125	1.375	1.625	1.875	2.125
24	24	0.25	0.375	0.562	0.375	0.688	0.969	0.5	1.219	1.531	1.812	2.062	2.344
30	30	0.312	0.5	0.625	0.375			0.5
32	32	0.312	0.5	0.625	0.375	0.688
34	34	0.312	0.5	0.625	0.375	0.688
36	36	0.312	0.5	0.625	0.375	0.75
42	42		0.5	0.625	0.375	0.75