Titanium Black Hairline Stainless Steel Sheet 304 / 1.4301 / SUS304 for Decoration
304 titanium black hairline stainless steel sheet is a high-performance decorative material that combines excellent corrosion resistance, aesthetic appeal, and mechanical strength. It is created by subjecting 304 stainless steel to a specialized titanium blackening process (forming a durable titanium nitride or titanium oxide coating on the surface) followed by a hairline brushing treatment—resulting in a sleek, fine linear texture with a sophisticated black finish. This sheet is widely favored in interior/exterior decoration for its ability to elevate spaces with a modern, minimalist, and high-end look.
1. Corresponding Grades (Equivalent Designations)
304 stainless steel has standardized equivalent grades across major global regions, ensuring consistency in material performance and interchangeability for international projects:
| Region/Standard | Grade Designation | Key Note |
| United States (ASTM) | 304 | The most commonly referenced grade in North America |
| European Union (EN) | 1.4301 | Official designation under European standards, identical to 304 in composition |
| Japan (JIS) | SUS304 | Japanese industrial standard grade, widely used in Asian manufacturing |
| China (GB/T) | 06Cr19Ni10 | National standard equivalent, reflecting chemical composition (Cr: ~19%, Ni: ~10%) |
2. Chemical Composition
The chemical composition of 304 (1.4301/SUS304) stainless steel is strictly regulated, which directly contributes to its corrosion resistance (especially against rust and oxidation) and structural stability. The typical composition (per ASTM/EN/JIS standards) is as follows:
| Element | Content Range (%) | Function |
| Chromium (Cr) | 18.00 – 20.00 | The core element for corrosion resistance; forms a dense chromium oxide film on the surface to prevent rust |
| Nickel (Ni) | 8.00 – 10.50 | Enhances ductility, toughness, and resistance to acidic/alkaline environments; stabilizes the austenitic structure |
| Carbon (C) | ≤ 0.08 | Controls strength and weldability; low carbon content minimizes carbide precipitation (avoids intergranular corrosion) |
| Manganese (Mn) | ≤ 2.00 | Improves workability and hardenability without compromising corrosion resistance |
| Silicon (Si) | ≤ 1.00 | Aids in high-temperature stability and manufacturing (e.g., casting, rolling) |
| Phosphorus (P) | ≤ 0.045 | Reduces brittleness; kept at low levels to maintain material integrity |
| Sulfur (S) | ≤ 0.030 | Minimized to prevent corrosion and improve machinability |
3. Mechanical Properties
304 titanium black hairline stainless steel retains the excellent mechanical properties of base 304 stainless steel, making it suitable for both decorative and light structural applications. The typical values (after standard annealing) are:
| Property | Standard Test Method | Typical Value |
| Tensile Strength (σb) | ASTM A370 / EN 10002-1 | ≥ 515 MPa |
| Yield Strength (σ0.2) | ASTM A370 / EN 10002-1 | ≥ 205 MPa |
| Elongation at Break (δ) | ASTM A370 / EN 10002-1 | ≥ 40% (in 50mm gauge length) |
| Hardness (Brinell) | ASTM E10 / EN ISO 6506-1 | ≤ 201 HB |
| Hardness (Rockwell B) | ASTM E18 / EN ISO 6508-1 | ≤ 92 HRB |
| Impact Toughness (Charpy V-notch) | ASTM A370 / EN 10045-1 | ≥ 27 J (at 20°C, no brittle fracture) |
4. Processing Services
To meet diverse decorative needs, 304 titanium black hairline stainless steel sheets can be customized through a range of professional processing services:
- Precision Cutting: Includes laser cutting (for complex shapes, accuracy ±0.1mm), waterjet cutting (no heat distortion, ideal for thick sheets), and shearing (for straight-line cutting of large batches).
- Bending & Forming: Cold bending (to create angles, arcs, or U-channels) and roll forming (for continuous profiles like decorative trim), with a minimum bending radius of 1.5× the sheet thickness (to avoid cracking).
- Edge Processing: Deburring (removes sharp edges for safety), edge chamfering (creates 45° or rounded edges for aesthetics), and edge folding (strengthens edges for installation).
- Hole Drilling & Punching: CNC drilling (for precise hole positions) and punching (for standard holes like mounting holes), suitable for installation-ready sheets.
- Surface Protection: Laminating (with PE film to prevent scratches during transportation/installation) and oiling (optional, for extra corrosion protection in humid environments).
- Custom Finishing: Secondary hairline refinement (adjustable texture density: 120#–600# grit) or combination finishes (e.g., titanium black hairline + 局部 mirror polishing for contrast effects).
5. Applications
Thanks to its elegant black hairline appearance, corrosion resistance, and durability, 304 titanium black hairline stainless steel is extensively used in decorative fields, including:
