RCC-M M3304 Nuclear Grade Stainless Steel Pipe
- RCC-M M3304
- 18-10 steel not containing Mo: Z6CN18-10, Z5CN18-10, Z2CN18-10, Z2CN19-10 (Controlled Nitrogen Content);
- 18-10 steel containing Mo: Z6CND17-12, Z5CND17-12, Z2CND17-12, Z2CDN18-12 (Controlled Nitrogen Content)
- Manufacturing Methods: hot-finished
- OD: 6 – 914mm WT: 1 – 50mm L: 6000-12000mm
Features
RCC-M M3304 Nuclear Grade Stainless Steel Pipe
Chemical Composition (wt%) of RCC-M M3304 Nuclear Grade Stainless Steel Pipe
| AFNOR Grade | Max. C | Max. Si | Max. Mn | Max. P (4) | Max. S (4) | Cr | Ni | Mo | Max. Cu | Max. N | *ICT Type of Treatment (2) |
| Steel Type: 18-10 steel without Mo | |||||||||||
| Z6CN18-10 | 0.080 | 0.75 | 2.00 | 0.030 | 0.015 | 17.00/20.00 | 8.00/11.00 | – | |||
| Z5CN18-10 | 0.060 | 0.75 | 2.00 | 0.030 | 0.015 | 17.00/20.00 | 9.00/12.00 | 1.00 | A | ||
| Z2CN18-10 | 0.030 | 0.75 | 2.00 | 0.030 | 0.015 | 17.00/20.00 | 9.00/12.00 | 1.00 | – | ||
| Z2CN19-10 (Crld. N) | 0.035 | 1.00 | 2.00 | 0.030 | 0.015 | 18.50/20.00 | 9.00/10.00 | 1.00 | 0.080 | – | |
| Steel Type: 18-10 steel with Mo | |||||||||||
| Z6CND17-12 | 0.080 | 0.75 | 2.00 | 0.030 | 0.015 | 16.00/19.00 | 10.00/14.00 | 2.00/2.50 | – | ||
| Z5CND17-12 | ≤0.070 | 0.75 | 2.00 | 0.030 | 0.015 | 16.00/19.00 | 10.00/14.00 | 2.00/2.50 | 1.00 | A | |
| Z2CND17-12(3) | 0.030 | 0.75 | 2.00 | 0.030 | 0.015 | 16.00/19.00 | 10.00/14.00 | 2.00/2.50 | 1.00 | – | |
| Z2CND18-12(3) (Ctrld. N) | 0.035 | 1.00 | 2.00 | 0.030 | 0.015 | 17.00/18.00 | 11.50/12.50 | 2.25/2.75 | 1.00 | 0.080 | – |
Note:
*ICT=Intergranular Corrosion Test
(1) Boron content for products to be welded: 0.0018% max. as determined by product analysis.
(2) Test to be performed, if required, in accordance with the requirements of paragraph 2.3.
(3) Specific grades for auxiliary piping,
(4) For part analysis, the maximum guaranteed value is increased by 0.005%.
Mechanical Properties of RCC-M M3304 Nuclear Grade Stainless Steel Pipe
| Steel Type | AFNOR Grade | Reference Heat Treatment | Mechanical Properties on Pipes and Tubes | |||||||
| Temperature | ||||||||||
| Room | 350℃ | |||||||||
| Min. Rm MPa | Min. Rp0.2% MPa | Min. A% (5D) | Min.KV(J)(1) | Min. Rp0.2% MPa | Min. Rm MPa | |||||
| Long. | Trans. | Long. | Trans. | |||||||
| Steel 18-10 Without Mo | Z6CN18-10 | Quenching after maintaining between 1050℃ and 1150℃ | 520 | 210 | 45 | 40 | 100 | 60** | 125 | 394 |
| Z5CN18-10 | 520 | 210 | 45 | 40 | 100 | 60** | 125 | 394 | ||
| Z2CN18-10 | 490 | 175 | 45 | 40 | 100 | 60** | 105 | 350 | ||
| Z2CN19-10 (Ctrld. N) | 520 | 210 | 45 | 40 | 100 | 60** | 125 | 394 | ||
| Steel 18-10 With Mo | Z6CND17-12 | 520 | 210 | 45 | 40 | 100 | 60** | 130 | 445 | |
| Z5CND17-12 | 520 | 210 | 45 | 40 | 100 | 60** | 130 | 445 | ||
| Z2CND17-12 | 490 | 175 | 45 | 40 | 100 | 60** | 105 | 355 | ||
| Z2CND18-12 (Ctrld. N) | 520 | 220 | 45 | 40 | 100 | 60** | 135 | 445 | ||
| Steel 18-10 with Mo work-hardened* | Z5CND17-12 | 690 | 490 | 20 | / | / | / | 279 | / | |
*For non-pressure parts.
**Value raised to 100J for class 1 equipment
(1)The impact test may be waived if the A% elongation value at ambient temperature is certified greater than or equal to 45% by the material manufacturer.
Technical Specifications
| Specification | Value |
| Standard | RCC-M M3304 Nuclear Grade Stainless Steel Pipe |
| Grade | 18-10 steel not containing Mo: Z6CN18-10, Z5CN18-10, Z2CN18-10, Z2CN19-10 (Controlled Nitrogen Content) 18-10 steel containing Mo: Z6CND17-12, Z5CND17-12, Z2CND17-12, Z2CDN18-12 (Controlled Nitrogen Content) |
| Delivery Condition | HFD: Hot finished heat treated, descaled |
| MFG. Methods | Hot-Rolled/Hot Expanding |
| Density | 7.93 – 7.98g/cm³ |
| Dimension | OD: 10.3 – 914mm WT: 1 – 50mm L: 6000-12000mm |
| Dimension & Tolerance | EN ISO 1127:2019 |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Tests | Chemical Analysis, Tensile Test, Flattening Test, KV impact for wall thickness ≥ 12 mm, Visual & Dimensional Inspection, NDT |
Packing
Small diameter packed in plywood box; large diameter packed on plywood pallets.
Applications
Reactor Cooling Systems: These pipes serve as components in nuclear reactors’ primary and secondary cooling circuits, handling the circulation of coolant under high pressure and temperature conditions.
Steam Generators: These are used to construct heat exchangers, which transfer heat from the reactor coolant to the water, generating steam for turbine operation.
Pressure Vessels: Pipes of this grade are integral in creating pressure vessels that can withstand the extreme conditions within a nuclear reactor, including high radiation exposure.
Piping Systems: They are critical in various piping systems within nuclear power plants, including those for emergency core cooling systems, where reliability and integrity are paramount.
Auxiliary Systems: Used in auxiliary systems like waste management, where materials must resist corrosion from radioactive waste and maintain mechanical properties.
Instrumentation Lines: These pipes are used in control and instrumentation for systems that require high precision, where corrosion resistance and durability are critical for safety and operational control.
Radiation Shielding: Sometimes, these pipes are part of shielding structures to protect against radiation leakage.
