Product Details
I. Base Material
II. Chemical Composition of Base Material (Mass Fraction wt%)
III. Mechanical Properties
IV. Processing Technology & Surface Roughness
V. Coating & Physical Characteristics
VI. Application Scenarios
Hydraulic cylinder shafts, pneumatic cylinder piston rods, guide shafts for automation equipment, food machinery, packaging machinery, precision shafts for electronic equipment, transmission components under humid and corrosive working conditions
| Item | Performance Parameters |
| Base Material Grade | 304 |
| GB Standard Grade | 06Cr19Ni10 |
| Surface Treatment | Chrome Plated |
| Chrome Plated Coating Thickness | ≤φ20: 15μm；＞φ20: 20μm, thickness customizable upon request |
| Surface Hardness after Chrome Plated | HV800～1100 |
| Common Diameter Range | φ3.0mm～φ300mm |
| Diameter Tolerance | Standard: h8, h9; High Precision: h7, f7, g6, h6 |
| Roundness | ≤1/2 of diameter tolerance |
| Straightness | ≤0.10mm/1000mm |
| Standard Length | 3m fixed length for φ40mm and below; 6m fixed length for sizes above φ40mm, custom lengths available for large sizes |
| End Face Requirement | Flat ends with chamfering and deburring |
II. Chemical Composition of Base Material (Mass Fraction wt%)
| C | Si | Mn | P | S | Cr | Ni |
| ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.00～20.00 | 8.00～11.00 |
III. Mechanical Properties
| Item | Specification |
| Tensile Strength Rm | ≥520 MPa |
| Yield Strength Rp0.2 | ≥205 MPa |
| Elongation after Fracture A | ≥40% |
| Base Material Hardness | ≤187 HB |
IV. Processing Technology & Surface Roughness
| Process Type | Complete Process Flow | Surface Roughness |
| Process 1 | Hot-rolled Base Material → Precision Drawing → Centerless Precision Grinding → Polishing → Chrome Plated → Finishing Polishing | Ra ≤0.2μm |
| Process 2 | Hot-rolled Base Material → Peeling & Straightening → Centerless Precision Grinding → Polishing → Chrome Plated → Finishing Polishing | Ra ≤0.2μm |
| Process 3 | Forged Round Bar → Turning → Centerless Precision Grinding → Polishing → Chrome Plated → Finishing Polishing |
V. Coating & Physical Characteristics
| Item | Specification |
| Coating Adhesion | No peeling or flaking; pass bending test |
| Corrosion Resistance | Superior to ordinary 304 stainless steel; enhanced rust resistance, resistant to acid, alkali and moisture |
| Friction Coefficient | Low friction, wear-resistant and scratch-resistant |
| Magnetism of Base Material | Non-magnetic / weakly magnetic |
VI. Application Scenarios
Hydraulic cylinder shafts, pneumatic cylinder piston rods, guide shafts for automation equipment, food machinery, packaging machinery, precision shafts for electronic equipment, transmission components under humid and corrosive working conditions
