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How to choose high quality A106GR.B seamless pipes?
How to choose high quality A106GR.B seamless pipes?
ASTM A106/A106M covers seamless carbon steel pipe for high-temperature service in NPS 1 ⁄ 8 - 48 (DN 6 -1200) inclusive, with nominal (average) wall thickness as given in ASME B 36.10M.
Chemical Component (MAX, %) of A106GR.B seamless pipes
Grade | C | Mn | P | S | Si | Cr | Cu | Mo | Ni | V |
A106Gr.B | 0.30 | 0.29-1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.40 | 0.08 |
Unless otherwise specified by the purchaser, for each reducion 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 1.65%.
Cr,Cu,Mo,Ni,V five elements combined shall not exceed 1%.
Mechanical Properties of A106GR.B seamless pipes
Grade | Tensile Strength psi[MPa] | Yield Strength psi[MPa] | Elongation | ||
Full size strip | Specimen | ||||
A106Gr.B | Longitudinal | 60000 [415] | 35000 [240] | 30 | 22 |
Transverse | 16.4 | 12 | |||
Tolerance(variation) of Outside Diameter of A106GR.B seamless pipes
NPS(DN) | Tolerance |
in. (mm) | in. (mm) |
1/8<OD≤1/6 (6<OD≤40) | +/- 1/64 (+/-0.4) |
1 1/2<OD≤4 (40<OD≤100) | +/- 1/32 (+/-0.8) |
4<OD≤8 (100<OD≤200) | -1/16 - +1/32 (-1.6 - +0.8) |
8<OD≤18 (200<OD≤450) | -3/32 - +1/32 (-2.4 - +0.8) |
18<OD≤26 (450<OD≤650) | -1/8 - +1/32 (-3.2 - +0.8) |
26<OD≤34 (650<OD≤850) | -5/32 - +1/32 (-4.0 - +0.8) |
34<OD≤48 (850<OD≤1200) | -3/16 - +1/32 (-4.8 - +0.8) |
Finished End of A106GR.B seamless pipes
If there is no specificed demands for pipe end from buyer, the Pipe shall be made end as below:
Outer Diameter | Wall Thickness | Pipe End |
≤NPS 1-1/2[DN 40] | All | plain-end square cut, or plain-end beveled |
≥NPS 2 [DN 50] | walls through extra strong weights | plain-end-beveled |
≥NPS 2 [DN 50] | Walls over extra strong weights | plain-end square cut |