ASTM A209/A209M Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Carbon Steel Heat Exchanger Tubes
1. Standard: ASTM A209 / A209M Seamless Carbon-Molybdenum Alloy-Steel Boiler and Super heater Tubes,Cold drawn and hot rolled seamless steel tubes for Boiler and Super heater
2. Applications: Boiler, Heat Exchanger, Cold Condensers
Size Range: OD:5-420mm WT:0.9-12.7mm
Steel Grade: T1, T1a, T1b
3. Manufacture:
Killed steel material.
The tubes are made by seamless process either hot-finished or cold-finished
Seamless Carbon-Molybdenum Alloy-Steel Boiler and Super heater Tubes
Cold drawn and hot rolled seamless steel tubes for Boiler and Super heater.
4. Delivery condition and Heat treatment:
Cold Drawn Seamless and Hot Rolled Seamless need Heat treatment .minimum temperature is 650℃
If Delivery condition is annealing, isothermal annealing, normalizing+ tempering tempering minimum temperature is 650℃
Hot-finished tubes are heat treated at a temperature of 1200℉ (650℃) or higher.
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Steel grade and Chemical Compositions
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Steel Grade
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C
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Mn
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P
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S
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Si
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Mo
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T1
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0.10-0.20
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0.30-0.80
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≤0.025
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≤0.025
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0.10-0.50
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0.44-0.65
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T1a
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0.15-0.25
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0.30-0.80
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≤0.025
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≤0.025
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0.10-0.50
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0.44-0.65
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T1b
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≤0.14
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0.30-0.80
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≤0.025
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≤0.025
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0.10-0.50
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0.44-0.65
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Mechanical Properties
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Seel Grade
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Tensile strength (Mpa)
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Yield Strength (Mpa)
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δfixed
(Pipe Segment S≥8mm vertical)
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δfixed
(S＜8mm vertical)
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δfixed
(Round brilliant)
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T1
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≥380
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≥205
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≥30
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See note
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≥22
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T1a
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≥415
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≥220
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≥30
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See note
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≥22
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T1b
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≥365
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≥195
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≥30
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See note
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≥22
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Note: S＜8mm vertical Elongation is the basic value minus 1.5%,per wall thickness minus 0.8mm
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HARDNESS
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Seel Grade
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HB S ≥5.1mm
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HRB S≤ 5.1mm
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T1
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≤146
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≤80
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T1a
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≤153
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≤81
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T1b
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≤137
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≤77
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Reference Documents:
ASTM A450/A450M Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Ally Steel Tubes
ASTM A941 Terminology Relating to Steel, Stainless Steel, Related Alloys and Ferroalloys
Molybdenum Alloy Steel Steel Heat Exchanger Tubes T1 T1a T1b Packing Details : In bundles or in wooden boxes packaging
Delivery Details : 30-60days
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking.
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
Impact Testing
Tensile Strength Testing
Chemical Composition Testing
A: A professional steel pipes materials inventor, manufacturer and solution provider
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample of Molybdenum Alloy Steel Steel Heat Exchanger Tubes T1 T1a T1b for free charge but need pay the cost of freight.
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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