ASME SA209 is the standard specification for seamless carbon-molybdenum alloy steel boiler tubes and superheater tubes. In this specification, there are different grades designated T1, T1a and T1b, each with specific properties and applications:
T1: ASME SA209 T1 is a seamless steel pipe commonly used in high temperature and high pressure applications, especially in power generation, petrochemical and refinery plants. These pipes are made of carbon-molybdenum alloy steel, which has good high-temperature strength and corrosion resistance.
T1a: ASME SA209 T1a is a variation of T1 with slightly different chemical composition and mechanical properties. It is also used in high temperature boiler and superheater applications.
T1b: ASME SA209 T1b is another variant with specific characteristics tailored for high temperature service. It may differ in composition or heat treatment compared to T1 and T1a to meet specific requirements.
These seamless tubes are designed to withstand the high temperatures and pressures found in boiler and superheater applications. They are often required to have excellent strength, high temperature resistance and corrosion resistance, making them suitable for use in harsh industrial environments.
A209 T1, T1a, T1b Seamless Carbon Molybdenum Alloy Steel Boiler Production Range
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Product
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ASTM A209 / A209M T1, T1a, T1b Seamless Alloy Tubes
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Specification
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ASTM A209 /A209M, ASME SA209
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Type
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Seamless
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Size
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12.7 to 127 mm
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Thickness
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0.9 to 12.7mm
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Length
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Single Random Length, Double Random Length, or as customer’s requirement.
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Grades
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T1, T1a, T1b
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Test Certificates
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Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2
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Mechanical Properties Of ASTM A209 T1, T1a, T1b
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Hardness
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Strength (Mpa)
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Strength (Mpa)
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(%)
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(HRB)
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T1
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≥380
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≥205
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≥30
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≤80
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T1a
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≥365
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≥195
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≥30
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≤81
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T1b
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≥415
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≥220
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≥30
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≤77
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