ASTM A240 304H Stainless Steel plate supplier
In the dynamic stainless steel market, ASTM A240 304H emerges as a robust, high-carbon austenitic grade ideal for high-temperature applications.
As QFSteel, a premier stainless steel exporter from China, we specialize in supplying top-quality ASTM A240 304H plates, sheets, and coils to global clients. If you’re searching on Google or Bing for “ASTM A240 304H stainless steel specifications” or “reliable 304H exporter China,” this comprehensive guide is tailored to your needs. We’ll delve into its unique features, properties, applications, and why QFSteel is your go-to partner, all optimized for clarity and search visibility.
What Sets ASTM A240 304H Stainless Steel Apart?
ASTM A240 304H is a high-carbon variant of the widely used 304 stainless steel, specified under the ASTM A240 standard for chromium and chromium-nickel stainless steel plates, sheets, and strips. This grade is engineered for enhanced creep resistance and strength in elevated temperature environments, making it a favorite for industries requiring durability beyond standard 304 or 304L.
Key Differences from Other 304 Grades
When users query “304H vs 304 stainless steel differences” on search engines, the primary distinction lies in carbon content. 304H’s higher carbon (0.04%-0.10%) boosts high-temperature performance, while maintaining excellent corrosion resistance. Unlike 304L’s low carbon for superior weldability in corrosive settings, 304H prioritizes thermal stability up to 800°C (1472°F), reducing risks of sensitization.
QFSteel ensures all exported ASTM A240 304H products meet or exceed standards like ASTM, EN, and JIS, with options for custom finishes such as 2B, BA, No.1, or mirror polish.
Chemical Composition of ASTM A240 304H
Understanding the chemical makeup is crucial for material selection, especially for searches like “ASTM A240 304H chemical composition details.” The precise alloying elements provide oxidation resistance and structural integrity. Below is a detailed table of the typical composition:
| Element | Composition Range (%) | Role in Material |
|---|---|---|
| Carbon (C) | 0.04 – 0.10 | Enhances high-temperature strength and creep resistance |
| Manganese (Mn) | ≤ 2.00 | Improves hot workability and toughness |
| Silicon (Si) | ≤ 0.75 | Boosts oxidation resistance |
| Phosphorus (P) | ≤ 0.045 | Controlled to maintain purity |
| Sulfur (S) | ≤ 0.030 | Minimized for better corrosion resistance |
| Chromium (Cr) | 18.00 – 20.00 | Provides primary corrosion and oxidation protection |
| Nickel (Ni) | 8.00 – 10.50 | Stabilizes austenitic structure for ductility |
| Nitrogen (N) | ≤ 0.10 | Adds strength without compromising formability |
QFSteel provides Mill Test Certificates (MTC) with every shipment, verifying composition through rigorous lab testing to ensure consistency for your projects.
Mechanical Properties and Performance Metrics
For engineers searching “ASTM A240 304H mechanical properties chart,” this grade offers impressive strength and ductility. It excels in both room-temperature and high-heat conditions, with superior creep rupture strength compared to lower-carbon variants.
Here’s a comprehensive table of key mechanical properties at room temperature:
| Property | Minimum Value | Test Conditions |
|---|---|---|
| Tensile Strength | ≥ 515 MPa (75 ksi) | As per ASTM A240 |
| Yield Strength (0.2% Offset) | ≥ 205 MPa (30 ksi) | Room temperature |
| Elongation (in 50 mm) | ≥ 40% | Gauge length standard |
| Hardness (Brinell) | ≤ 201 HB | Annealed condition |
| Hardness (Rockwell B) | ≤ 92 HRB | For reference in fabrication |
At elevated temperatures (e.g., 500-800°C), 304H maintains yield strength above 100 MPa, making it suitable for long-term exposure. Post-weld heat treatment is recommended to optimize these properties, and QFSteel offers technical guidance on this.
Diverse Applications of ASTM A240 304H Stainless Steel
ASTM A240 304H’s versatility drives searches like “304H stainless steel uses in industry.” Its heat and corrosion resistance make it indispensable across sectors. Below, we outline primary applications with examples:
| Industry Sector | Common Applications | Benefits |
|---|---|---|
| Petrochemical & Refining | Heat exchangers, reactors, piping systems | Resists thermal cycling and corrosive media |
| Power Generation | Boiler tubes, superheaters, furnace components | High creep strength for sustained high-heat operations |
| Chemical Processing | Storage tanks, pressure vessels, distillation columns | Excellent resistance to acids and alkalis |
| Food & Pharmaceutical | Sterilization equipment, processing lines | Hygienic, non-contaminating surfaces |
| Aerospace & Automotive | Exhaust manifolds, structural supports | Lightweight yet durable in extreme temperatures |
In real-world scenarios, QFSteel has exported over 100 tons of 304H plates to a U.S. power plant, enhancing efficiency by 25% through reduced maintenance. For “high temperature stainless steel applications,” 304H often outperforms costlier alloys like 310 or 316 in non-marine environments.
Comparing ASTM A240 304H with Similar Grades
To address common comparisons like “304H vs 316H stainless steel” or “304H vs 321 stainless steel,” we’ve compiled a quick reference table:
| Grade | Key Advantages Over 304H | Drawbacks Compared to 304H | Typical Cost Difference |
|---|---|---|---|
| 304L | Better weldability in wet corrosion | Lower high-temp strength | Similar or lower |
| 316/316H | Superior pitting resistance (due to Mo) | Higher cost, less heat focus | 20-30% higher |
| 321 | Titanium stabilization against sensitization | More expensive, specialized | 15-25% higher |
304H strikes a balance for cost-effective, high-heat performance, saving clients up to 20% on materials without sacrificing quality.
Why QFSteel Stands Out as Your 304H Stainless Steel Exporter
As a customer-centric exporter, QFSteel caters to searches like “best ASTM A240 304H supplier China.” Our advantages include:
- Inventory and Customization: Stock thicknesses from 0.3mm to 100mm, widths up to 2500mm; services like laser cutting, bending, and edge milling.
- Quality and Compliance: Third-party inspections (SGS, BV) and full traceability.
- Pricing and Logistics: Competitive factory-direct prices; global shipping to 60+ countries with fast turnaround.
- Sustainability: Eco-friendly production using recycled scrap, aligning with “green stainless steel exporters.”
We handle all export formalities, ensuring hassle-free delivery.
Frequently Asked Questions (FAQs) for Quick Insights
Addressing top search queries:
- What is the price of ASTM A240 304H per kg? Contact QFSteel for tailored quotes based on volume and specs.
- Is 304H weldable? Yes, with proper annealing to avoid intergranular corrosion.
- Where to buy bulk 304H stainless steel? QFSteel offers MOQs from 1 ton, with samples available.
- How does 304H handle corrosion? Superior in oxidizing environments; data sheets provided upon request.
Final Thoughts: Elevate Your Projects with QFSteel’s ASTM A240 304H
ASTM A240 304H stainless steel delivers unmatched value for high-performance needs, and QFSteel ensures seamless export solutions. Whether optimizing for “export quality 304H from China” or seeking specs, partner with us for excellence. Reach out today via our website for quotes, samples, or expert consultations—let’s drive your success!
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