Material Performance
5Cr17Ni4Cu4Nb Stainless Steel:
High Strength: Achieves hardness HRC 36-40 , far exceeding that of conventional stainless steel.
The material is resistant to acid, alkali and corrosion, suitable for chemical medium and humid environment.
Short-term high temperature resistance and excellent long-term performance.
Tolerance control(GB/T 1804-2000 grade)
- Dimensional tolerances:
Critical Hole Diameter: ∅3.0 (upper deviation +0.005mm, lower deviation 0mm), ensuring precise mating with bolts.
- Geometric Tolerances:
Flatness: ≤0.05mm/m²,
Hole Positioning: ±0.03mm deviation, meeting precision assembly requirements.
Surface Treatment
Smooth, burr-free surface (Ra ≤3.2μm) with dense oxide film formed via acid pickling and passivation, enhancing corrosion resistance and anti-fingerprint properties.
Key Technical Parameters
| Parameter | Requirement | Test Standard |
|
| Material | 5Cr17Ni4Cu4Nb (precipitation-hardened) | GB | |
| Surface Roughness | Ra ≤3.2μm | GB | |
| Hardness | HRC 36-40 | GB | |
| Hole Diameter Tolerance | ∅3.0* (+0.005/-0) | Drawing Specification | |
| Surface Treatment | Passivation | Enterprise Standard |
Typical Applications
- Chemical Pipelines: Sealing against acid/alkali media to prevent leaks and corrosion.
- Pharmaceutical Equipment: Cleanroom pipe connections complying.
- Food Processing: Dairy filling line seals withstand high-temperature cleaning and steam sterilization.
- Hydraulic Systems: High-pressure oil circuit flange covers resistant to pulsating pressure.
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