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)
22.533.544.5566.5-77.5-88.5-99.5-101112
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 (%)

GradeC≤MnP≤S≤Si≥Cr≤Cu≤Mo≤Ni≤V≤
A0.250.27-0.930.0350.0350.10.40.40.150.40.08
B0.30.29-1.060.0350.0350.10.40.40.150.40.08
C0.350.29-1.060.0350.0350.10.40.40.150.40.08

ASTM A106 (ASME SA106) Mechanical Properties

GradeRm Mpa Tensile StrengthYield Point (Mpa)ElongationDelivery Condition
A≥330≥20520Annealed
B≥415≥24020Annealed
C≥485≥27520Annealed

ASTM A106 (ASME SA106) Dimension Tolerances

Pipe TypePipe SizesTolerances
Cold DrawnOD≤48.3mm±0.40mm
≥60.3mm±1%mm
WT±12.5%

JIS Number and Corrensponding Foreign Standards

JISASTMBSDINNFISOIndex Number
Std.NoGradeTypeStd.NoGradeTypeStd.NoGradeTypeStd.NoGradeTypeStd.NoGradeTypeStd.NoGradeType
G3456STPT370
(STPT38)
CA106GrAC3602HFS360C17175St35.8CA49-211TU37bC2604-02-01 00:00:00TS5CC004
"CFS360C17177St37.8CA49-213TU37cC2604-03-01 00:00:00TW9HC
"ERW360CA49-243TU37cC
"CEW360C
STPT410
(STPT42)
CA106GrBC3602HFS410C17175St45.8CA49-211TU42bC2604-02-01 00:00:00TS9HC
"CFS410C17177St42.8CA49-213TU42cC
"ERW410CA49-243TU42cC
"CEEW410C
STPT480
(STPT42)
CA106GrCC3602HFS460CA49-211TU48bC2604-02-01 00:00:00TS14C
"CFS460CA49-213TU48cC
"ERW460C
"CEEW460C

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

NPS (in)Outside Diameter (in) 
ASTM A106 Grade B Pipe ScheduleSCH 10SCH 20SCH 30SCH STDSCH 40SCH 60SCH XSSCH 80SCH 100SCH 120SCH 140SCH 160SCH XXS
Wall Thickness (in)
1/80.4050.0680.0680.0950.095
1/40.540.0880.0880.1190.119
3/80.6750.0910.0910.1260.126
1/20.840.1090.1090.1470.1470.1870.294
3/41.050.1130.1130.1540.1540.2190.308
11.3150.1330.1330.1790.1790.250.358
1.251.660.140.140.1910.1910.250.382
1.51.90.1450.1450.20.20.2810.4
22.3750.1540.1540.2180.2180.3440.436
2.52.8750.2030.2030.2760.2760.3750.552
33.50.2160.2160.30.30.4380.6
3.540.2260.2260.3180.318
44.50.2370.2370.3370.3370.4380.5310.674
55.5630.2580.2580.3750.3750.50.6250.75
66.6250.280.280.4320.4320.5620.7190.864
88.6250.250.2770.3220.3220.4060.50.50.5940.7190.8120.9060.875
1010.750.250.3070.3650.3650.50.50.5940.7190.84411.1251
1212.750.250.330.3750.4060.5620.50.6880.84411.1251.3121
14140.250.3120.3750.3750.4380.5940.50.750.9381.0941.251.406
16160.250.3120.3750.3750.50.6560.50.8441.0311.2191.4381.594
18180.250.3120.4380.3750.5620.750.50.9381.1561.3751.5621.781
20200.250.3750.50.3750.5940.8120.51.0311.2811.51.751.969
22220.250.3750.50.3750.8750.51.1251.3751.6251.8752.125
24240.250.3750.5620.3750.6880.9690.51.2191.5311.8122.0622.344
30300.3120.50.6250.3750.5
32320.3120.50.6250.3750.688
34340.3120.50.6250.3750.688
36360.3120.50.6250.3750.75
42420.50.6250.3750.75