ASTM A209 Varnish Seamless Alloy Tube / Mechanical Tubing OD 10mm-203mm
ASTM A209 ,Standard Specification for Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes
Usage:
1. Low and medium pressure fluid transportation pipeline
2. Power plant
3. Boiler tube
4. Petrochemical industry
Package: Oil dipped or black painted surface, packed in seaworthy bags, hexagonal bundled.
Chemical Composition:
| 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:
| Grade | T1 | T1a | T1b |
| Tensile Strength min Ksi(Mpa) | 55(380) | 60(415) | 43(365) |
| Yield Strength Min Ksi(Mpa) | 30(205 | 32(220) | 28(195) |
| Elongation in 2in or 50mm min% | 30 | 30 | 30 |
Heat treatment:
Hot finished and cold finished tubes shall be heat treated at a temperature of 650? at least. And full annaealed, isothermal annealed, or normalized and tempered condition at the option of the manufacturer, the minimum tempering temperature shall be not less than 650 ?.
Mechanical Tests Required:
Tension test
Flattenting Test
Hardness test
Hydrostatic or Nondestructive Electric test
| Outside Diameter | Length | Standard Package |
| OD = 168.3mm | L = 13.5m | Bare in bundle with steel hoops (Round or Hexagonal Form) |
| 13.5mm < L | Protect under steel hoops (Round or Hexagonal Form) | |
| 168.3mm < OD | - | Bare in loose |
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