Technical Analysis of ASME SA213 T23 Seamless Steel Tube

1、 Core material characteristics

Chemical composition optimization:

Low carbon design: The carbon content is controlled at 0.04-0.10%, significantly reducing the risk of welding cold cracking and improving processing performance.

Alloy strengthening: containing chromium (Cr: 1.90-2.60%), molybdenum (Mo: 0.05-0.30%), tungsten (W: 1.45-1.75%), and adding niobium (Nb) and nitrogen (N) to form carbon nitride reinforced grain boundaries, with excellent high-temperature creep resistance.

High temperature performance:

Temperature resistance limit: The maximum operating temperature can reach 600 ℃, the long-term stable operating temperature is ≤ 550 ℃, the tensile strength is 410-530 MPa, the yield strength is ≥ 205 MPa, and the elongation rate is ≥ 30%.

Anti aging brittleness: By reducing the synergistic effect of nitrogen content (N ≤ 0.015%) and titanium (Ti: 0.005-0.06%), the high-temperature strength of grain boundaries is improved.

2、 Core application scenarios

Power industry:

Used for superheater and reheater pipelines in supercritical boilers, suitable for high temperature steam environments of 550-600 ℃..

Key materials for high-temperature heating surfaces in thermal and nuclear power equipment to ensure efficient operation of the unit.

Ships and Petrochemicals:

The high-temperature components of ship boilers, petrochemical hydrogenation reactors, and heat exchanger pipelines have outstanding corrosion resistance and high pressure resistance.

Industrial equipment:

Gas turbine combustion chambers, high-temperature flue gas pipelines, etc. meet the mechanical strength and anti-oxidation requirements in extreme environments.

3、 Manufacturing process and welding technology

Production process:

Adopting seamless cold drawing/hot rolling process, with high surface smoothness and uniform wall thickness (common specifications such as φ 73 × 5mm, φ 406 × 65mm).

Support internal thread design, enhance fluid turbulence effect, and improve heat transfer efficiency.

Welding process:

Groove treatment: The gap between the groups is 2-3mm, and the preheating temperature is 150-200 ℃ to avoid incomplete fusion and oxidation defects.

Post weld heat treatment: Tempering treatment at 710-730 ℃ significantly improves the impact toughness of the weld seam (hardness ≤ 240 HV).

4、 Comparative analysis and advantages

Compared to G102 steel:

T23 has better welding performance and improved corrosion resistance, but its room temperature strength is slightly lower than G102 3.

Compared to T91 steel:

The Cr content of T23 is lower (2.25% vs. 9Cr), but through the strengthening effect of W and Nb, its thermal strength is better at ≤ 600 ℃ environment.

5、 Market Supply and Certification

In stock specifications: outer diameter range 26-762mm, wall thickness 3-130mm, supports cutting to length (such as 6 meters, 12 meters).

Certification standards: Complies with ASME SA-213/SA-213M standards, compatible with national standard GB5310 (20G), and meets global project procurement needs.

Summary

ASME SA213 T23 seamless steel pipe performs excellently in high temperature, high pressure, and corrosive environments with its low-carbon high alloy design and seamless manufacturing process. It covers a wide range of fields such as electricity, ships, and petrochemicals, and ensures long-term reliability through optimized welding and heat treatment processes. The market supply is flexible, but attention should be paid to the premium space of high-precision customized products.