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:
439 Stainless Steel Sheet 2B 2D Finishing 0.8-3.0mm TISCO POSCO
