The properties and uses of 321H stainless steel tube are as follows:

1、 Core Features

High temperature stability

It can be used for a long time in an environment below 650 ℃, with a short-term temperature resistance of over 850 ℃. Its high-temperature oxidation resistance is significantly better than that of ordinary 321 stainless steel tubes.

Resistance to intergranular corrosion

By adding titanium element to stabilize carbides, the intergranular corrosion caused by high-temperature sensitization is effectively suppressed, making it suitable for high-temperature working conditions after welding.

Enhance mechanical performance

Compared to the 321 base model, the 321H improves high-temperature creep strength and persistent fracture performance by adjusting the carbon content (usually 0.04-0.10%).

2、 Specification parameters

Material standards: ASTM A312/A213 (seamless pipe), ASTM A269 (welded pipe)

Typical size range:

Outer diameter: Φ6mm~Φ830mm

Wall thickness: 1mm~60mm

Surface treatment: supports various processes such as wire drawing, polishing, acid washing, etc

3、 Main application areas

Thermal energy equipment: boiler superheater tubes, heat exchanger tubes, cracking furnace tubes

Chemical plant: High temperature acid conveying pipeline, reaction vessel lining

Aerospace: Engine exhaust system, high-temperature fasteners