ASTM A106 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. 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. 1 arial, helvetica, sans-serif; white-space: normal; color: rgb(85,85,85); vertical-align: baseline; border-top: 0px; border-right: 0px; word-spacing: 0px; padding-top: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px\"> Main steel grade:
Chemical Requirements ASTM A106
| Element | Grade A | Grade B | Grade C |
| Carbon,max | 0.25 (1) | 0.30 (2) | 0.35 (2) |
| Manganese | 0.27-0.93 | 0.29-1.06 | 0.29-1.06 |
| Phosphorus,max | 0.035 | 0.035 | 0.035 |
| Sulfur,max | 0.035 | 0.035 | 0.035 |
| Silicon,min | 0.10 | 0.10 | 0.10 |
| Chrome,max (3) | 0.40 | 0.40 | 0.40 |
| Copper,max (3) | 0.40 | 0.40 | 0.40 |
| Molybdenum,max (3) | 0.15 | 0.15 | 0.15 |
| Nickel,max (3) | 0.40 | 0.40 | 0.40 |
| Vanadium,max (3) | 0.08 | 0.08 | 0.08 |
(1) 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%.
(2)Unless otherwise specified by the purchaser, 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 1.65%.
(3) These five elements combined shall not exceed 1%.
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