GOST 9941-81
12X18H12T 1.4541 Seamless Stainless Steel tube For Petrochemical

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GOST 9941-81
12X18H12T 1.4541 Seamless Stainless Steel tube For Petrochemical

It is an austenitic, titanium-stabilized stainless steel.

• Key Characteristics: The addition of Titanium (Ti) provides exceptional resistance to intergranular corrosion, particularly after exposure to high temperatures in the range of 450-850°C. This makes it an ideal choice for welding and high-temperature applications.

• Manufacturing Process: The "seamless" process, involving hot extrusion or pilgering, ensures a homogeneous structure with superior pressure integrity, uniformity, and reliability compared to welded alternatives.

• Primary Applications: This tube is extensively used in demanding environments such as chemical processing, oil & gas, power generation, and aerospace for critical components like heat exchangers, furnace tubes, pressure vessels, and piping systems that operate under high temperatures and corrosive media.

1.Chemical & Mechanical Properties

Mechanical Properties

2. Key Adventages

• Exceptional High-Temperature & Intergranular Corrosion Resistance

The stabilizing effect of Titanium (Ti) effectively prevents chromium carbide precipitation, even within the sensitization temperature range of 450-850°C, thereby eliminating the risk of intergranular corrosion after welding or high-temperature service.

• Superior High-Temperature Strength & Oxidation Resistance

Maintains excellent mechanical properties and resistance to scale formation under continuous high-temperature exposure, ensuring long-term stability and reliability of equipment.

• Unmatched Reliability from Seamless Construction

The seamless manufacturing process ensures a continuous, homogeneous structure without the potential weak point of a longitudinal weld. This results in higher pressure integrity, superior uniformity, and consistent performance.

3. Key Applications

• Chemical & Petrochemical Processing

Used in heat exchangers, catalytic cracking units, process piping, and reactor internals, capable of withstanding various acidic media and high-temperature environments.

• Oil & Gas

Applied in downhole tools, pipelines for sour service (handling sulfur-containing hydrocarbons), and heater tubes in refineries.

• Energy & Power Generation

A key material for superheaters, reheaters in power station boilers, and high-pressure steam lines, ensuring long-term, safe operation under high temperatures and pressures.

• Aerospace

Used in engine exhaust systems, hydraulic tubing, and other heat-resistant components that demand extreme performance-to-weight ratios.

4. Testing