JIS G3461 STB35 Carbon Steel Tubes for Boiler and Heat Exchanger

Instruction

JIS G3461 STB35 Carbon Steel Tubes for Boiler and Heat Exchanger

 

Material and Specification
JIS G3461 STB35 carbon steel tubes are specifically designed for applications in boilers and heat exchangers. These tubes are made from high-quality carbon steel, which provides excellent thermal conductivity and corrosion resistance. The specifications for STB35 are defined by the Japanese Industrial Standards (JIS) G3461.

 

Key Features
• Good thermal conductivity: STB35 carbon steel tubes efficiently transfer heat, making them ideal for use in boilers and heat exchangers.
• Corrosion resistance: The use of high-quality carbon steel ensures that these tubes can withstand harsh operating conditions without succumbing to corrosion.
• Weldability and formability: The low carbon content in STB35 steel allows for easy welding and shaping during the manufacturing process.

 

Chemical Composition

Element	Composition (%)
Carbon (C)	0.16 - 0.18
Silicon (Si)	0.10 - 0.35
Manganese (Mn)	0.30 - 0.60
Phosphorus (P)	≤ 0.035
Sulfur (S)	≤ 0.035

 

Mechanical Properties

Property	Value
Tensile Strength	≥ 35 kgf/mm²
Yield Strength	≥ 25 kgf/mm²
Elongation	≥ 30%
Hardness (HB)	≤ 143

 

Steel Grade
STB35 is the specific grade of carbon steel used in the manufacturing of these tubes. It conforms to the JIS G3461 standard and is renowned for its strength, durability, and resistance to high temperatures.

 

Application
JIS G3461 STB35 carbon steel tubes find widespread applications in the following industries:
• Power generation: Used in boilers and heat exchangers to transfer heat and generate electricity efficiently.
• Petrochemicals: Utilized in various processes for heat transfer and thermal regulation.
• Refineries: Employed in heat exchangers to remove excess heat from refining processes.

 

Possible Alternative Grades
While STB35 is a commonly used carbon steel grade for boiler and heat exchanger tubes, there are other alternative grades available with similar properties. Some of the possible alternatives are:
• STB42: A carbon steel grade that offers higher tensile strength and improved corrosion resistance compared to STB35.
• STB510: This grade provides superior resistance to oxidation and high-temperature strength, making it suitable for more demanding applications.
It is essential to consider the specific requirements and operating conditions when selecting the most suitable alternative grade.