Carbon Steel Heat Exchanger Tubes With Seamless Carbon - Molybdenum Alloy - Steel
ASTM A209/A209M Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Carbon Steel Heat Exchanger Tubes
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
Applications: Boiler, Heat Exchanger, Cold Condensers
Size Range: OD:12.7-127mm WT:0.9-12.7mm
Steel Grade: T1, T1a, T1b
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.
| STEEL GRADE AND CHEMICAL COMPOSITIONS | ||||||
| Seel Grade | C | Mn | P | S | Si | Mo |
| T1 | 0.10-0.20 | 0.30-0.80 | ≤0.025 | ≤0.025 | 0.10-0.50 | 0.44-0.65 |
| T1a | 0.15-0.25 | 0.30-0.80 | ≤0.025 | ≤0.025 | 0.10-0.50 | 0.44-0.65 |
| T1b | ≤0.14 | 0.30-0.80 | ≤0.025 | ≤0.025 | 0.10-0.50 | 0.44-0.65 |
| Mechanical Properties | |||||
| Seel Grade | Tensile strength (Mpa) | Yield Strength (Mpa) | δfixed (Pipe Segment S≥8mm vertical) | δfixed (S＜8mm vertical) | δfixed (Round brilliant) |
| T1 | ≥380 | ≥205 | ≥30 | See note | ≥22 |
| T1a | ≥415 | ≥220 | ≥30 | See note | ≥22 |
| T1b | ≥365 | ≥195 | ≥30 | See note | ≥22 |
| Note: S＜8mm vertical Elongation is the basic value minus 1.5%,per wall thickness minus 0.8mm | |||||
| HARDNESS | ||
| Seel Grade | HB S ≥5.1mm | HRB S≤ 5.1mm |
| T1 | ≤146 | ≤80 |
| T1a | ≤153 | ≤81 |
| T1b | ≤137 | ≤77 |
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.
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
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.