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ASTM A334 GR.6 Boiler Tube Carbon And Alloy Steel For Low Temperature Service

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ASTM A334 GR.6 Boiler Tube Carbon And Alloy Steel For Low Temperature Service

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Brand Name : YUHONG

Model Number : ASTM A334

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : CHINA

MOQ : 100KGS

Payment Terms : L/C, T/T

Delivery Time : 7DAYS

Packaging Details : PLYWOOD CASE,BUNDLE,WOVEN BAG

Standard : ASTM A334,ASME SA334

Material : GR.1,3,6,7,8,9,11

Length : 6000MM,6096MM,SRL,DRL

OD : 3/4" (19.05), 1"(25.4) , 1-1/4"(31.75), 1-1/2"(38.1), 2" (50.8), 2-1/2"(63.5) , 3" (76.2)

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ASTM A334 GR.6 Boiler Tube Carbon and Alloy Steel for Low Temperature Service

ASTM A334 Grade 6 (A334 Gr. 6) is a specification for seamless and welded carbon and alloy steel pipe for low-temperature service. Specifically, this grade is used for the construction of boiler tubes, heat exchangers, condensers, and similar applications, where resistance to low temperatures is crucial.

Key Characteristics of ASTM A334 Gr. 6:

  • Material Composition: A334 Gr. 6 primarily consists of carbon steel with small additions of manganese and other alloying elements. The steel is designed for use in low-temperature environments, which makes it resistant to brittle fracture under those conditions.

  • Temperature Range: This material is designed to perform well at temperatures as low as -50°F (-46°C), with specific mechanical properties maintained at low temperatures.

  • Mechanical Properties:

    • Yield Strength: Minimum yield strength is typically around 30,000 psi (205 MPa).
    • Tensile Strength: The tensile strength typically ranges from 50,000 psi (345 MPa) to 70,000 psi (485 MPa).
    • Elongation: Typically, A334 Gr. 6 must have a minimum elongation of 30% in 8 inches (200mm).
  • Applications: This material is used in the construction of heat exchangers, condensers, and other heat transfer systems for applications in chemical, petrochemical, and energy industries, as well as other sectors requiring low-temperature service.

  • Welding and Fabrication: A334 Gr. 6 is typically welded using methods that are compatible with carbon and low-alloy steels. Post-weld heat treatment may be required, depending on the application and specific conditions.

Chemical Requirements for ASTM A334 Grade 6 Tubes

Grade Mfg. Process Chemical composition(%)
C Si Mn P S Ni Others
Grade 1 S, E, AT 0.30Max - 0.40~1.06 0.05Max 0.60Max - (STBL450)
Grade 3 S, E, AT 0.19Max 0.18~0.37 0.31~0.64 0.05Max 0.050Max 3.18-3.82 -
Grade 6 S, E, AT 0.30Max 0.10Max 0.29~1.06 0.048Max 0.058Max - -
Grade 7 S, E, AT 0.19Max 0.13~0.32 0.90Max 0.04Max 0.050Max 2.03~2.57 (STBL690)
Grade 8 S, E, AT 0.18Max 0.13~0.32 0.90Max 0.045Max 0.045Max 8.40~9.60 (Cu 0.75~1.25)
Grade 9 S, E, AT 0.20Max - 0.40~1.06 0.045Max 0.50Max 1.60~2.24 -

Tensile Requirements for ASTM A334 Grade 6 Tubes

Grade Tensile Test MPa or N/mm2 Remaks
(Similar to JIS)
Min Yield point Tensile Strength
Gr. 1 205 380Min Impact Test(J)
2V 18
Gr. 3 240 450Min 2V 18
Gr. 6 240 415Min 2V 18
Gr. 7 240 450Min 2V 18
Gr. 8 520 690Min 2V 18
Gr. 9 315 435Min 2V 18

ASTM A334 GR.6 Boiler Tube Carbon And Alloy Steel For Low Temperature Service


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ASTM A334 GR.6 Boiler Tube

      

Low Temperature Service Boiler Tube

      

Alloy Steel Boiler Tube

      
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