Hot Rolled 446 Stainless Steel Plate Thickness 0.1-3mm ASTM 410 420 430 Ba 8K Stainless Steel Sheet with Certification
I. Basic Information
446 stainless steel is a high-chromium ferritic stainless steel with excellent high-temperature oxidation resistance and corrosion resistance, suitable for industrial applications in high-temperature environments.
Standard System: AISI 446 (ASTM A240/A276), UNS S44600, Werkstoff Nr. 1.4762/1.4763, JIS SUS 446/SUH446, Chinese GB 2Cr25N
Metallic Structure: Ferritic structure, non-heat-treatable hardenable stainless steel (cannot be hardened by heat treatment)
Magnetism: Ferromagnetic
II. Chemical Composition (wt%)
| Element |
Content Range |
Function |
| Chromium (Cr) |
23.0-27.0 |
Forms a dense chromium oxide protective layer, providing excellent oxidation and corrosion resistance |
| Carbon (C) |
≤0.20 |
Low-carbon design reduces carbide precipitation and minimizes intergranular corrosion risk |
| Silicon (Si) |
≤1.00 |
Enhances heat resistance and oxidation resistance |
| Manganese (Mn) |
≤1.50 |
Improves strength and toughness |
| Phosphorus (P) |
≤0.040 |
Controls impurity content |
| Sulfur (S) |
≤0.030 |
Controls impurity content |
| Nickel (Ni) |
≤0.75 |
Improves toughness and processability |
| Nitrogen (N) |
Approx. 0.20 |
Enhances strength and corrosion resistance |
III. Mechanical Properties
| Property Index |
Value |
Test Condition |
| Tensile Strength |
≥450 MPa (65 ksi) |
Room Temperature |
| Yield Strength |
≥275 MPa (40 ksi) |
Room Temperature (0.2% Offset) |
| Elongation |
≥20% |
Room Temperature (50mm Gauge Length) |
| Hardness |
≤201 HB |
Brinell Hardness |
| Density |
7.75-7.8 g/cm³ |
Room Temperature |
| Melting Point |
1425-1510°C |
- |
IV. Physical Properties & High-Temperature Performance
Thermal Conductivity: Average 11.0 W/m·K (20-1000°C)
Maximum Service Temperature: 1082-1100°C (no spalling oxide scale formation at this temperature)
Oxidation Resistance: Forms a stable CrO oxide film in high-temperature environments to protect the base metal from further oxidation
Sulfidation Resistance: Excellent resistance to sulfur-containing high-temperature environments, suitable for petrochemical industry applications
V. Sheet Specifications & Surface Treatments
Thickness Range: 0.01~200mm
Common Widths: 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, etc.
Standard Lengths: 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc.
Surface Treatments:
Hot Rolled (HR): No.1 Surface (suitable for subsequent processing)
Cold Rolled (CR): 2B, 2D, BA Surfaces (widely used in general industry)
Special Treatments: Mirror Finish (NO.8/8K), Brushed, Sandblasted, Embossed, etc.
Delivery Condition: Solution Annealing + Pickling (for optimal corrosion resistance and processability)
VI. Key Application Fields
1. Energy & Power Industry
Boiler combustion chambers and liners
Heat exchangers and boiler components
Industrial furnace tubes, liners, and baffles
Incinerator parts
2. Petrochemical & Metallurgical Industry
Internal components of high-temperature reactors
High-temperature pipelines in oil refining equipment
Steel annealing furnace parts
High-temperature supports in glass manufacturing
3. Other Industrial Applications
Automotive exhaust system components
High-temperature waste gas treatment equipment
Domestic water heater combustion chambers
Coastal and industrial area corrosion-resistant structures
VII. Foreign Trade Application Notes
Standard Compatibility: Specify the target market's standard (e.g., ASTM A240 for North America, DIN EN 10088 for Europe) in contracts to avoid technical discrepancies.
High-Temperature Performance Emphasis: Highlight the 1100°C maximum service temperature and sulfidation resistance in product brochures for petrochemical/energy sector clients.
Surface Treatment Customization: Clarify surface finish requirements (e.g., 2B for food processing, No.1 for high-temperature equipment) and thickness tolerances (per ASTM A480) in purchase orders.
Corrosion Resistance Advantages: Emphasize superior performance in high-temperature, sulfur-containing, and coastal environments compared to 304/316 series stainless steels for targeted marketing.
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.
All our products are strictly tested for quality before packaging, and unqualified products will be destroyed and customers can appoint third parties to inspect the products before loading too.
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.
Audited Supplier 
){kind=link}