Stainless steel hard chrome plated bar is made from iron-based alloys containing chromium and nickel, finished with a hard chrome layer reaching HV850+ hardness. Unlike carbon steel chrome bars, its corrosion resistance comes from the base material itself, so it stays protected even if the surface is scratched — making it well suited for piston rods and guide shafts in marine, offshore,
Highlights
- Corrosion resistant even when scratched — Unlike carbon steel, which relies on an intact chrome layer, the base material itself resists rust
- Available in SUS304, SUS316, or SUS410 — Choose the grade based on corrosion severity and strength requirements
- HV850+ surface hardness — Chrome thickness min 15μm below Φ22.225mm, min 20μm at Φ24mm and above
- Surface roughness ≤ Ra0.2μm — Suited for precision sealing and high-cycle operation
- OD tolerance f8, roundness 1/2 of tolerance — Ensures strong cylinder alignment
- Precise straightness — Max 0.25mm/1000mm below Φ20mm, max 0.2mm/1000mm at Φ20mm and above
- Size range Φ6–200mm, standard length 2M–6M — Custom sizes available
Specifications
| OD Tolerance | f8 |
|---|---|
| Surface Roughness | Ra 0.2μm max |
| Hard Chrome Thickness | Below Φ22.225mm: min 15μm Φ24mm and above: min 20μm |
| Surface Hardness | HV 850 min |
| Straightness | Below Φ20mm: max 0.25mm/1000mm Φ20mm and above: max 0.2mm/1000mm |
| Roundness | 1/2 of tolerance |
| Standard Length | 2M~6M |
| Standard Size | Φ6~200mm |
| Steel Grades | SUS304、SUS316、SUS410（可依需求提供其他規格） |
Technical Features
- Corrosion resistance doesn't depend on a surface coating — SUS304 and SUS316 austenitic stainless steels resist rust, moisture, oil, and chemical exposure through the alloy itself
- Better long-term value — Higher upfront cost than carbon steel, but lower maintenance needs and fewer replacements over service life
- Clean, hygienic finish — Suited for food, medical, or high-end machinery applications
- Can serve as a chrome plating substrate — Combines base-material corrosion resistance with surface wear resistance
- SUS304 suits light-load pneumatic and non-structural parts, offering good corrosion resistance and weldability
- SUS316 suits high-chloride environments (seawater, chemical exposure), providing top-tier corrosion protection
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