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S/A 106 seamless pipe is one of our most popular products.  We carry Schedules 10 through 160, STD, XH, and XXH.

ASTM A106 Seamless Steel Pipe Specifications

ASTM A106 pipe (also covered in ASME specifications as S/A 106) is the standard specification for seamless carbon steel pipe for high-temperature service. Most common uses are in refineries and plants when gasses or fluids are transported at high temperatures and pressures.  Federal Steel Supply is a world leader in the supply of A106 / SA 106 pipe and stocks a full range of grades B/C in a size rage of NPS 1/8″ to NPS 48″, with nominal (average) wall thickness as given in 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, for flanging, for welding, and for similar forming operations. A full range of A106 stock is available in Schedules 10 through 160, STD, XS, XXS. Unscheduled wall thicknesses available up to 4 inches.

Federal Steel Supply stocks a full range of A106 seamless carbon steel pipe.

 Grades B/C


NPS 1/8″ to NPS 48”
Wall thickness: Schedules 10 through 160, STD, XS, XXS.

*Commonly requested unscheduled walls up to 4” and certified minimum wall items


Chemical Properties %

C, max. Mn P, max S, max Si, min Cr, max Cu, max Mo, max Ni, max V, max
Grade A * 0.25 0.27 – 0.93 0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08
Grade B 0.30 0.29 – 1.06 0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08
Grade C 0.35 0.29 – 1.06 0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08

*For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%.

 Mechanical Properties                                

Grade A          Grade B          Grade C

Tensile strength, min, psi (MPa)                  48,000 (330)    60000 (415)     70,000 (485)

Yield strength, min, psi (MPa)                     30,000 (205)    35,000 (240)    40,000 (275)


(Note: This is summarized information from ASME Specification A106. Please refer to the specific Standard or Specification or contact us for more details.)