321 nuclear-grade steam pipe, 18Cr-10Ni-Ti austenitic stainless steel, maintains ≥95% strength under γ-ray dose of 10⁶ Gy. Intergranular corrosion resistant (ASTM A262 E, no cracks).
| Element | Content (%) | Nuclear-Grade Function |
|---|---|---|
| Cr | 17.0–19.0 | Forms passive film resisting radiation-induced oxidation; stability improved 20% under radiation. |
| Ni | 9.0–12.0 | Stabilizes austenite, reduces radiation-induced lattice distortion, improves toughness. |
| Ti | ≥5×C% | Preferentially forms TiC, eliminates intergranular corrosion risk; meets nuclear-grade safety requirements. |
Physical: Density 7.93 g/cm³, Melting Point 1400–1450℃, Thermal Conductivity 16 W/(m·K)
Radiation: Irradiation swelling ≤0.5% (10⁶ Gy); meets 30-year nuclear power plant design life
Outer Diameter: 22–108 mm
Wall Thickness: 2–8 mm
Length: 6 m (±5 mm), supports irradiation inspection
Surface Treatment: Bright annealed (BA); inner wall electropolished (Ra ≤0.6 μm); optional radiation-proof marking
Stainless Steel Tubes Packed in Truck
Wooden Crate Packaging in Factory
Neo-Mac Machine with Stainless Steel Tubes
Factory Tube Packaging Process
Industrial Manufacturing Equipment
Stainless Steel Composition Analyzer
Specification: Φ57×4 mm
Performance: Resistant to 10⁶ Gy radiation, pressure 15 MPa
Case: Qinshan Nuclear Power Plant Secondary Loop Steam Pipe
Specification: Φ32×3 mm
Performance: Resistant to 10⁵ Gy radiation, no performance degradation
Case: Institute of High Energy Physics, CAS Pipeline
Walmay will help match the right stainless product form and specification for your application, confirm quantities and packing needs, and provide requested documents based on order requirements.
