A106HF (OD&Wall) – ASTM Specifications

A106 Standard specification for seamless carbon steel pipe for high-temperature service. Pipe ordered under this specification shall be suitable for bending, flanging, and similar forming operations and for welding. Produced to special outside diameter tolerance. Furnished in one of three grades, A, B, or C.

Typical Chemical Properties
	Grade A	Grade B	Grade C
Carbon %	0.25	0.30	0.35
Manganese, %	0.27 – 0.93	0.29 – 1.06	0.29 – 1.06
Phosphorous, Max*, %	0.035	0.035	0.035
Sulfur, Max, %	0.035	0.035	0.035
Silicon, max, %	0.100	0.100	0.100
Chrome, max**, %	0.400	0.400	0.400
Copper, max**, %	0.400	0.400	0.400
Molybdenum, max**, %	0.150	0.150	0.150
Nickel, max**, %	0.400	0.400	0.400
Vanadium, max**, %	0.080	0.080	0.080

* 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%.

** These five elements combined shall not exceed 1.0%

Typical Mechanical Properties
	Grade A	Grade B	Grade C
Tensile Strength, Min, psi[Mpa]	48,000 [330]	60,000 [415]	70,000 [485]
Yield Strength, Min, psi[Mpa]	30,000 [205]	35,000 [240]	40,000 [275]
Elongation*** in 2 inch [50mm] , min, % (Longitudinal / Transverse)	28 / 20	22 / 12	20 / 12

*** When standard 2 inch [50mm] gage length specimen is used

Typical Permissible Variations in Wall Thickness
The minimum wall thickness at any point shall not be more that 12.5% under the specified wall thickness

Typical Permissible Variations in Outside Diameter
For pipe over 10 inch [250 mm] ordered as special outside diameter tolerance pipe, the outside diameter shall not vary by more than 1% over or 1% under the specified outside diameter.

Information provided is “Typical” for specific requirements please inquire.