Steel House India is a premier manufacturer, supplier, and stockist of high-performance ASTM A276 AISI 446 stainless steel round bars in India. Engineered as a high-chromium ferritic stainless steel, Grade 446 is specifically designed for extreme thermal environments, providing unparalleled resistance to oxidation and scaling at temperatures reaching up to 1100°C. With a chromium content of 23.00% to 27.00%, this grade offers superior performance in highly corrosive, high-temperature industrial settings where other standard alloys would fail. By combining metallurgical precision with advanced manufacturing capabilities, we ensure our AISI 446 bars provide the structural stability and long-term durability required for industrial furnaces, heat exchangers, and other critical high-heat applications.
Our comprehensive inventory is meticulously sourced to ensure metallurgical purity and consistency for your most demanding projects. While our expertise in the high-heat-resistant Grade 446 is a benchmark in the industry, we maintain a robust supply chain for various other industrial grades to meet your specific design parameters, including the high-hardness AISI 440C Stainless Steel Round Bar for wear-intensive applications and the stabilized AISI 321 Stainless Steel Round Bar, which provides excellent resistance to intergranular corrosion at elevated temperatures. With our centralized distribution hub in Mumbai, we provide pan-India delivery, ensuring that your procurement needs—from prototype development to large-scale industrial maintenance—are met with precision, competitive pricing, and industry-leading transit times.
Bulk ASTM A276 AISI 446 Stainless Steel Round Bar Stock
Heat-Resistant ASTM A276 AISI 446 Stainless Steel Round Bars
Ready-Stock ASTM A276 AISI 446 Stainless Steel Round Bar Inventory
Chemical Composition of AISI 446
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.20 Max |
| Chromium (Cr) | 23.00 – 27.00 |
| Manganese (Mn) | 1.50 Max |
| Silicon (Si) | 1.00 Max |
| Nickel (Ni) | 0.60 Max |
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (Min) | 450 – 550 MPa |
| Yield Strength (0.2% Offset) | 250 – 350 MPa |
| Elongation | 15% – 20% |
| Hardness (Brinell) | 150 – 190 HB |
Specifications
Standards: ASTM A276, ASTM A479, ASME SA276.
Testing: PMI, Ultrasonic, Hardness, and Tensile testing.
Documentation: EN 10204 3.1 Mill Test Certificate (MTC).
Surface Finish: Black (Hot Rolled), Bright, Peeled, Ground, and
Polished.
Size Range
We offer an extensive, ready-to-dispatch inventory:
Round Bar: 5mm to 300mm diameter.
Custom Sizes: Precision cutting and processing available per your
specific drawings.
Equivalent Grades
| Standard | Designation |
|---|---|
| USA (AISI) | 446 |
| Germany (DIN) | 1.4762 |
| Europe (EN) | X10CrAl24 |
| Japan (JIS) | SUS 446 |
Grade Comparison
Selecting the optimal material for thermal environments is essential for equipment longevity. Comparing the heat-resistant 446 with other grades helps align your choice with operational temperatures and mechanical load requirements.
| Feature | Grade 446 | Grade 440C | Grade 321 |
|---|---|---|---|
| Classification | Ferritic | Martensitic | Austenitic |
| Max Temperature | Up to 1100°C | Moderate | Up to 800°C |
| Hardness | Moderate | Very High | Low |
| Oxidation Resistance | Excellent | Moderate | Good |
For applications where mechanical wear and extreme hardness are more critical than heat resistance, we recommend evaluating our AISI 440C Stainless Steel Round Bar. If your project involves elevated temperatures coupled with a requirement for superior formability and weldability, our AISI 321 Stainless Steel Round Bar provides the necessary stabilization to prevent sensitization.
Applications
■ Furnace Components: Hearth plates, burner nozzles, and furnace
linings.
■ Heat Exchangers: Tubes and baffles for high-heat industrial
systems.
■ Oil & Gas: Equipment subject to sulfurous atmospheres and
combustion gases.
■ Glass Industry: Structural supports and components exposed to
molten glass.
Advantages & Features
■ Superior Oxidation Resistance: Exceptional performance in air at
temperatures up to 1100°C.
■ High Chromium Content: Provides robust protection against scaling
and chemical corrosion.
■ Excellent Scaling Resistance: Maintains structural integrity in
harsh industrial combustion environments.
■ Good Machinability: Provides consistent dimensional stability for
precision-engineered components.
Pricing & Stock Availability
Starting Price: ₹100 to ₹400/kg (subject to current market rates, size, quantity, and alloy surcharges).
📊 Request an Instant Commercial Quote: Metal market pricing fluctuates based on daily raw chromium and alloy surcharges. Our commercial team adapts quotes dynamically to offer you the best value based on order tonnage and custom processing requirements. Contact our Mumbai sales office today for a real-time bulk contract quotation.
Why Choose Steel House India
■ Extensive Stock: Ready-to-ship inventory in Mumbai to minimize
project lead times.
■ Certified Quality: 100% material traceability with EN 10204 3.1
certification.
■ Pan-India Logistics: Rapid, secure transit to your manufacturing
site.
■ Technical Expertise: Dedicated support for high-temperature
material selection.
Frequently Asked Questions (FAQ)
1. What is the maximum operating temperature for AISI 446 stainless steel?
AISI 446 is engineered for exceptional oxidation and scaling resistance in oxidizing atmospheres at continuous service temperatures of up to 1100°C (2012°F).
2. Why is AISI 446 preferred for high-sulfur environments?
Unlike nickel-rich austenitic grades (like 310 or 321) that can degrade rapidly in sulfur-rich flue gases, AISI 446's high chromium content and low nickel provide superior resistance to sulfidation and hot corrosion.
3. Is AISI 446 stainless steel magnetic?
Yes, AISI 446 is a ferritic stainless steel with a body-centered cubic microstructure, which makes it strongly magnetic in all heat-treated and service conditions.
4. Can AISI 446 be welded successfully?
Yes, it is weldable using traditional methods (like TIG/MIG), but it requires careful pre-heating (approx. 250–400°F) and low heat input to prevent grain growth and embrittlement due to its ferritic structure.
5. How does AISI 446 compare to AISI 321 for high-temperature use?
AISI 446 is superior for high-temperature oxidation and sulfidation resistance (up to 1100°C), whereas AISI 321 is better suited for applications requiring higher ductility, weldability, and resistance to intergranular corrosion at moderate temperatures (up to 800°C).
6. Does Steel House India provide certification for 446 bars?
Yes, we provide an EN 10204 3.1 Mill Test Certificate (MTC) with every delivery, ensuring full chemical and mechanical traceability for your industrial compliance.
7. Is AISI 446 heat-treatable?
No, AISI 446 is a non-hardenable ferritic grade. It cannot be hardened by heat treatment; it is typically used in its annealed state for maximum thermal stability.
8. How can I get an instant commercial quote for AISI 446?
For a real-time quote, please email your specific requirements, grade, and tonnage to sales@steelhouseindia.com. Our senior sourcing officers will respond within two business hours with current pricing and lead times.
Request a Callback from Our Sourcing Desk
This commercial product page is managed by Steel House India. For immediate product inquiries, direct bulk contracts, or to request a technical consultation, please forward your detailed material requirements to sales@steelhouseindia.com. Once received, a senior technical sourcing officer will review your specifications and contact you within two business hours to finalize your order.