Premium Dual-Surface Craft Hairline Brushed 8K Mirror Polished 201 304 304L 316L 321 Stainless Steel Plate with Stable Gloss

Product Description

Product Description

Custom 300 Series Mirror Stainless Steel Sheets 201/202/301/304 0.3mm-3.0mm Plate Thickness For Bending & Welding

304 stainless steel plate, also known as 18-8 stainless steel, is the most widely applied austenitic stainless steel worldwide. Classified under ASTM A240 standard, it contains 18% chromium and 8% nickel as core alloying elements, delivering outstanding natural rust resistance, superb formability, full weldability and hygienic non-toxic performance. Compared with low-cost 201 stainless steel, 304 boasts stable anti-corrosion capacity for indoor and inland outdoor environments; compared with premium 316 stainless steel, it achieves obvious cost advantages without molybdenum addition. Available in cold rolled thin sheets and hot rolled thick plates, 304 stainless steel plate has become the standard raw material for food machinery, architectural decoration, household appliances, chemical equipment and general industrial structures.
1. Standard Chemical Composition of 304 Stainless Steel Plate
All data below follows ASTM A240 standard, listed in mass percentage (wt%) with element functions explained:

Alloy Element	Content Range (wt%)	Core Function
Chromium (Cr)	17.50 - 19.50	Forms dense self-repairing chromium oxide passive film, the fundamental anti-corrosion guarantee
Nickel (Ni)	8.00 - 10.50	Stabilizes austenite structure, improves ductility, low-temperature toughness and welding performance
Carbon (C)	≤ 0.08	Low carbon avoids intergranular corrosion after welding; 304L variant ≤0.03% for heavy welding
Manganese (Mn)	≤ 2.00	Deoxidizer, stabilizes austenite phase, reduces raw material cost
Silicon (Si)	≤ 1.00	Smelting deoxidation, enhances high-temperature oxidation resistance
Phosphorus (P)	≤ 0.045	Harmful impurity, strictly limited to prevent cold brittleness
Sulfur (S)	≤ 0.030	Controls machinability; excess sulfur weakens corrosion resistance
Nitrogen (N)	≤ 0.10	Auxiliary strengthening, improves yield strength slightly
Iron (Fe)	Remainder	Base metal matrix

The 18Cr-8Ni balanced formula creates a non-magnetic soft alloy that does not harden via heat treatment, distinguishing it from martensitic stainless steel like 410 and ferritic 430 grade.
2. Mechanical & Physical Properties of Annealed 304 Stainless Steel Plate
304 cannot be hardened by quenching/tempering; strength can only be increased by cold rolling work hardening. Below are standard annealed base mechanical indicators:
Mechanical Property Table (Annealed Flat Plate)

Performance Index	Standard Minimum Value	Unit	Remark
Tensile Strength	520	MPa	Cold-worked plate can reach 700-900 MPa
Yield Strength (0.2% Proof)	205	MPa	Soft annealed state
Elongation	≥ 40	%	Excellent deep drawing & bending performance
Hardness Max	187 HB / 90 HRB	Hardness	Cold rolled hard temper up to 250+ HB

Basic Physical Properties
Density: 7.93 g/cm³
Melting range: 1398-1454 ºC
Modulus of elasticity: 193 GPa
Thermal conductivity (20ºC): 16.3 W/(m·K)
Continuous service temperature: Up to 870 ºC
Non-magnetic (slight magnetism appears after heavy cold forming)
Self-repair passive film: Scratches re-oxidize automatically in air
3. Common Surface Finishes of 304 Stainless Steel Plate
Different surface treatments match diverse decorative and industrial needs:
2B Finish (Most Popular) Cold rolled, annealed & pickled with skin pass; matte silver semi-reflective surface, low cost, easy secondary polishing, widely used for industrial equipment, tanks and general fabrication.
BA Bright Annealed Finish Annealed under protective atmosphere; high-gloss semi-mirror surface, applied to cookware, refrigeration shells and decorative panels.
No.4 Brushed / HL Hairline Finish Uniform fine linear satin texture, hides minor fingerprints and scratches; standard for elevator panels, kitchen countertops, handrails.
No.8 Mirror Finish 8K full mirror ultra-high reflectivity, used for decorative cladding, signage, mirror panels and luxury architectural decoration.
No.1 Hot Rolled Pickled Finish Thick plate surface for structural frames, pressure vessels, mechanical base parts with no strict aesthetic requirements.
4. Core Advantages of 304 Stainless Steel Plate
4.1 Excellent Natural Corrosion & Rust Resistance
The chromium passive film blocks oxidation, resisting rainwater, humidity, fresh water, weak organic acids and daily detergent erosion. It never rusts under normal indoor and inland atmospheric conditions without extra coating. The film self-repairs instantly after surface scratches.
4.2 Outstanding Formability & Deep Drawing Capacity
High elongation enables complex bending, stamping, deep drawing, rolling and embossing without cracking. It is ideal for manufacturing curved kitchenware, water tanks and irregular decorative components.
4.3 100% Weldable & Stable Post-Weld Performance
Compatible with argon arc welding, spot welding and laser welding. Standard 304 has slight intergranular corrosion risk after high-temperature welding; select 304L low-carbon grade for large welded structures to eliminate this defect.
4.4 Food-Grade Hygienic & Non-Toxic
Non-reactive with food acids, salt and water; smooth non-porous surface prevents bacterial breeding, easy to sanitize with high-temperature water and food disinfectants, fully compliant with global food safety standards.
4.5 Wide Temperature Adaptability
Retains toughness at cryogenic temperatures and stable oxidation resistance up to 870 ºC continuous working temperature, suitable for both refrigeration equipment and high-temperature oven casings.
4.6 Long Service Life & Low Maintenance
No painting or anti-rust coating required for inland use; only simple regular cleaning is needed, greatly reducing later maintenance cost compared with carbon steel plates.
5. Main Product Specifications
Thickness: Cold rolled thin sheet 0.2mm-6.0mm; Hot rolled plate 6mm-100mm
Standard sizes: 1000×2000mm, 1220×2440mm, 1500×3000mm; custom cut-to-size available
Temper states: Soft annealed, 1/4 hard, 1/2 hard, full hard (custom cold rolling hardness)
Custom processing: Cutting, bending, polishing, laser cutting, punching, composite color coating
6. Wide Industrial Application Fields
6.1 Food & Beverage Processing Industry
Food storage tanks, mixing barrels, production conveyor chutes, kitchen countertops, sinks, commercial oven shells, catering equipment, dairy machinery, beverage pipelines. The hygienic feature makes 304 the mandatory standard for direct food contact surfaces.
6.2 Architectural & Decorative Engineering
Indoor handrails, elevator cabin panels, door frames, curtain wall decorative plates, signage, stair kick plates, hotel decorative cladding, indoor waterproof wall panels.
6.3 Household Appliances
Refrigerator inner liners, washing machine shells, range hood panels, stainless steel cookware, water dispensers, kettle bodies, disinfection cabinet casings.
6.4 General Chemical & Light Industry
Low-concentration chemical storage tanks, water treatment equipment, heat exchanger plates, pharmaceutical workshop structural frames, textile machinery parts, printing equipment housings.
6.5 Transportation & Mechanical Manufacturing
Automotive interior decorative parts, bus handrails, rail vehicle interior panels, equipment cabinets, pump valve casings, bearing protective covers.
7. Limitations & Practical Selection Tips
Poor chloride resistance: 304 contains no molybdenum; long-term exposure to seawater, swimming pools, coastal salt fog will cause pitting corrosion. Choose 316 stainless steel plate for marine or high-salt environments.
Not for strong acid/alkali: Concentrated sulfuric acid, caustic soda and chloride solutions will break down the passive film and induce corrosion.
Slight magnetism after forming: Heavy bending or cold rolling may generate weak magnetism, which is normal and does not affect anti-rust performance.
Welding suggestion: For full welding fabrication, prioritize 304L low-carbon plate to avoid post-weld intergranular corrosion.
Coastal usage: If 304 must be used near the sea, add anti-fingerprint coating or regular wax maintenance to extend service life.
8. Conclusion
As the benchmark universal stainless steel sheet, 304 stainless steel plate balances superior corrosion resistance, excellent forming and welding performance, food safety and reasonable cost. It fills the market gap between cheap low-nickel 200-series stainless steel and high-cost molybdenum-containing 316 grade. From catering facilities and architectural decoration to industrial equipment and household appliances, 304 stainless steel plate remains the first-choice anti-rust metal sheet for most inland and indoor projects. With the development of polishing and color coating technology, high-aesthetic 304 decorative plates will further expand its share in high-end construction and consumer product manufacturing.
 

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Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based", since the establishment of the company and always to do our best to satisfy potential needs of our customers. Our company is sincerely to willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with irresistible force.

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FAQ

Q1: Why choose us?
A: Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.

Q2: Can you provide OEM/ODM service? 
A: Yes. Please feel free to contact us for more details.

Q3:What is your terms of payment?
A: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.

Q4: Can we visit your factory? 
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.

Q5: Can you provide sample? 
A: Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.

Q6: How long is your delivery time?
A: Regular lead time is 15 to 30 days after receiving deposit.