ASTM A333 Gr. 1 Seamless Pipe for Power Plant Low Temperature
Service
All seamless Gr. 1 pipes shall be treated to control their
microstructure in acocrdance with one of the following methods:
Normalized by heating to a uniform temperature of not less than
1500°F (815°C) and cool in air or in the cooling chamber of an
atmosphere controlled furnace.
At the discretion of the manufacturer, reheat to a suitable
tempering temperature.
For the seamless process only, reheat and control hot working and
the temperature of the hot-finishing operation to a finishing
temperature range from 1550 to 1750°F (845 to 945 °C) and cool in
air or in a controlled atmosphere furnace from an initial
temperature of not less than 1550°F (845°C).
1. Standards:
ASTM A333: Standard Specification for Seamless and Welded Steel
Pipe for Low-Temperature Service
2. Application:
Oil, Gas and water delivery;
Refinery, Boiler and Mechanical equipment manufacture;
structure construction; drilling, ship building and etc.
3. Ordering Information
Quantity (feet, centimeters, or number of lengths),
Name of material (seamless pipe),
Grade (Gr.1),
Size (NPS or outside diameter and schedule number of average wall
thickness),
Lengths (specific or random),
End finish
Optional requirements
Test report required
4. Chemical Requirements
| Chemical Composition % Gr. 1 |
| Carbon (C) max | Manganese (Mn) | Phosphorus (P) max | Sulfur (S) max | Silicon (Si) | Nickel (Ni) | Chromium (Cr) | Copper (Cu) | Aluminum (Al) | Vanadium (V) max |
| 0.3 | 0.40-1.06 | 0.025 | 0.025 | … | … | … | … | … | … |
For each reduction of 0.01% carbon below 0.30%, an increase of
0.05% manganese above 1.06% would be permitted to a maximum of
1.35% manganese. When Grade 6 is ordered under this specification,
supplying an alloy grade that specifically requires the addition of
any element other than those listed for the ordered grade is not
permitted. However, the addition of elements required for the
deoxidation of the steel is permitted.
5. Manufacturing Process
Raw Material Inspection → Cold Centering → Heating → Piercing &
Rolling → SIzing → Heat Treatment → Testing → Finishing → NDE →
Visual & Dimension Inspection → Marking → Storing & Shipping
6. Mechanical Properties
Tensile Strength, min: 55 ksi/380MPa
Yield Strength, min: 30ksi/205MPa
7. Available Size Range
| OD | Thickness |
| mm | inch | mm | SCH |
| 88.9~1422 | 3''~ 56'' | 2.11~140 | ≥SCH10 |
*If the steel grades and size you are looking for are not listed
above, please contact us for further information. |
