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ASME SA209 Grade T1a Carbon Steel Boiler Tube Seamless Steel Superheater Tubes
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ASME SA209 Grade T1a Carbon Steel Boiler Tube Seamless Steel Superheater Tubes
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ASME SA209 Grade T1a Carbon Steel Boiler Tube Seamless Steel Superheater Tubes

Brand Name: YUHONG
Model Number: ASME SA209 T1a Carbon Steel Boiler Tube
MOQ: 1000kgs
Packaging Details: Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Payment Terms: L/C,T/T
Detail Information
Product Description
Detail Information
Place of Origin:
CHINA
Certification:
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Product Name:
Boiler Tube
Standard Grade:
ASTM A209, ASME SA209
OD:
1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", Etc.
Thickness:
BWG10-25
Length:
Single Random, Double Random & Cut Length
End:
Plain End
Surface Condition:
Oil, Black Painting
Highlight:
ASME SA209 T1a Carbon Steel Tube, Seamless Steel Boiler Tube, Superheater Tubes
Product Description

ASME SA209 Grade T1a Carbon Steel Boiler Tube Superheater Tube Seamless Steel Tube
 
 
ASME SA209 Grade T1a is a seamless carbon-molybdenum (C-Mo) alloy steel tube manufactured specifically for high-temperature boiler and superheater service. The "T1a" designation means it has strictly controlled residual elements (copper, nickel, and chromium) to ensure stable creep resistance and structural integrity under prolonged exposure to elevated temperatures and internal steam pressure. It is typically procured in the normalized condition with optional NDT, suitable for bending, welding, and expansion-rolling into boiler headers.

 

 

Equivalent Grade of ASME SA209 Grade T1a Carbon Steel Boiler Tube Seamless Steel Superheater Tubes

DINENBSNFAASTMASME
DIN 17175 Grade 16Mo5–– –ASTM A209 GradeT1ASME SA 209 Grade T1–

 
 
Chemical Composition% of ASME SA209 Grade T1a Carbon Steel Boiler Tube Seamless Steel Superheater Tubes

GradeCMnPSSiMo
T10.10-0.200.30-0.80≤0.025≤0.0250.10-0.500.44-0.65
T1a0.15-0.250.30-0.80≤0.025≤0.0250.10-0.500.44-0.65
T1b0.14 max0.30-0.80≤0.025≤0.0250.10-0.500.44-0.65

 
 

Mechanical Properties of ASME SA209 Grade T1a Carbon Steel Boiler Tube Seamless Steel Superheater Tubes

GradeTensile Strength (Mpa)Yield Strength (Mpa)Elongation % 

Hardness

HRB

T1≥380≥205≥30≤80
T1a≥365≥195≥30≤81
T1b≥415≥220≥30≤77

 

 
Maximum Service Temperature & Oxidation Resistance

  • Oxidation Limit: In dry flue gas or steam atmospheres, the practical upper operating limit for continuous service is 550°C (1022°F). Above this temperature, surface scaling (oxidation) accelerates rapidly, leading to metal wastage.

  • Creep-Rupture Strength: The molybdenum content significantly enhances creep resistance between 425°C – 550°C (800°F – 1020°F). For reference, the average 100,000-hour creep-rupture strength at 500°C is approximately 85 MPa (12.3 ksi).

  • Critical Warning: This grade must not be used in the temperature range of 600°C – 675°C (1112°F – 1247°F) for extended periods, as this range promotes severe graphitization—the transformation of iron carbides into free graphite, which drastically reduces ductility and can lead to catastrophic brittle failure. (The "T1a" residual restrictions were specifically introduced to slow down this graphitization process).

 

 

Applications

 
The addition of Molybdenum (0.44–0.65%) provides this tube with excellent resistance to creep and oxidation at intermediate temperatures. 
 

  • Superheater coils in power generation boilers.
  • Reheater tubes.
  • Water wall tubes and boiler headers.

High-pressure steam lines operating at temperatures up to approximately 500°C – 550°C (932°F – 1022°F), depending on the operating pressure.
 

 

ASME SA209 Grade T1a Carbon Steel Boiler Tube Seamless Steel Superheater Tubes
Tags: 

ASME SA192 Carbon Steel Boiler Tube  

chemical processing Carbon Steel Boiler Tube  

oil and gas Steel boiler tube

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