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| Warranty: | According to The Actual Project Application |
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ASTM A209 Grade T1a Superheater Tubes
Standard:ASTM A209
Steel grade: Grade T1, Grade T1a, Grade T1b
Outside diameter: 12.7mm-127mm
Wall thickness: 0.9mm-12.7mm
Length: 3-12M, single random or double random length, specified length in the order
Steelmaking practice: killed steel
Manufacture method: hot finished or cold finished
Process type: by seamless or not welded
Packing: alloy steel boiler are supplied in hexagonal bundles or round bundles tied with steel strip. Each bundle has two pieces of lifting belts for unloading. Loaded by 40"HQ container in 20-27mt.
Chemical composition requirements
|
Element |
Composition, % |
||
|
Grade T1 |
Grade T1a |
Grade T1b |
|
|
Carbon |
0.1-0.20 |
0.15-0.25 |
0.14 max |
|
Manganese |
0.30-0.80 |
0.30-0.80 |
0.30-0.80 |
|
Phosphorus, max |
0.025 |
0.025 |
0.025 |
|
Sulfur, max |
0.025 |
0.025 |
0.025 |
|
Silicon |
0.10-0.50 |
0.10-0.50 |
0.10-0.50 |
|
Molybdenum |
0.44-0.65 |
0.44-0.65 |
0.44-0.65 |
Tensile requirements
|
Item |
Grade T1 |
Grade T1a |
Grade T1b |
|
Tensile strength, min, MPa |
380 |
365 |
415 |
|
Yield strength, min, Mpa |
205 |
195 |
220 |
|
Elongation in 2in. or 50mm |
≥30% |
≥30% |
≥30% |
Hardness requirement
|
Grade T1 |
146 HBW |
80 HBW |
|
Grade T1a |
153 HBW |
81 HBW |
|
Grade T1b |
137 HBW |
77 HBW |
Heat treatment
Hot finished tubes shall be heat treated at a temperature of 650ºC or higher. Cold finished tubes shall, after the final cold finishing, be heat treated at a temperature of 650 ºC or higher, or tubing may be furnished in the full-annealed, isothermal annealed,or normalized and tempered condition. If furnished in the normailzed and tempered condition, the minimum tempering temperature shall be 650ºC.
Forming operations
Tubes when inserted in the boiler shall stand expanding and beading without showing cracks or flaws. Superheater tubes when properly manipulated shall stand all forging, welding, and bending operations necessary for application without developing defects.
Advantage of our company
1. Our products has ever been exported to all over the world for important construction project.
2. We hold a sufficient inventory of carbon steel pipe products in a variety of material, sizes, shapes to meet your different requirements.
3. As the distributor and trader in the local market, we have long term cooperation and business relations with many world-famous manufacturers. Due to their strong support, not only is the price of our products cheaper than other suppliers, but also the quality stands the competition well.
4. After-sales service team. After buying our products, you are guaranteed to have a well-trained and dedicated team at your side to welcome any requests you might have.
The application of ASTM A209 steel tubes
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