QN1803 Stainless Steel Sheet
What is QN1803 Stainless Steel Sheet?
QN1803 Stainless Steel Sheet is a newly launched high-strength, nitrogen-containing austenitic stainless steel developed by Tsingshan Group. It is designed to be a superior alternative to traditional 304 stainless steel, offering enhanced performance and cost-efficiency. QN1803 Stainless Steel Sheet provides excellent corrosion resistance, high strength, and superior wear resistance. It is easy to process and weld, making it suitable for a wide range of industrial and architectural applications. The innovative high-nitrogen, low-nickel design reduces alloy costs while maintaining high performance, complying with national standards and the Chinese Steel Association's group standards.
Features of QN1803 Stainless Steel Sheet
1) The pitting equivalent (PREN=Cr+3.3Mo+30N-Mn) is above 19.0 and has at least the same pitting resistance as Inox 304 stainless steel. In the environment of dilute hydrochloric acid, dilute sulfuric acid, acetic acid + salt and other environments, the resistance to uniform corrosion is much better than that of 304 stainless steel;
2) In the actual use state after bending,stamping,hard state and other cold processing and forming, the corrosion resistance is better than 304 stainless steel;
3) The yield strength is 1.3 times or more of Inox 304 stainless steel, and has an elongation of not less than 45%.
Wear resistance and fatigue performance are better than 304 stainless steel;
4)Good welding performance: post-welding strength is higher than 304 stainless steel,corrosion resistance is comparable to 304 stainless steel.
* For detailed comparison parameters with other stainless steel grades, see the tables below.
Chemical Composition of QN1803 (vs. 304)
| Stainless Steel Grade | QN1803 | 304 | |
| Chemical Composition(%) | Standard | T/CISA 022-2019 | ASTM A240 |
| C | ≤0.10 | 0.04 | |
| Si | ≤1.00 | 0.40 | |
| Mn | 4.00-8.00 | 1.05 | |
| P | ≤0.050 | 0.035 | |
| S | ≤0.005 | 0.0021 | |
| Cr | 17.50~19.50 | 18.11 | |
| Ni | 2.00~3.50 | 8.02 | |
| Mo | ≤0.30 | 0.02 | |
| Cu | 1.00-3.50 | 0.12 | |
| N | 0.20-0.30 | 0.045 | |
| Nb+Ti | / | / | |
| PREN | >19.0 | 18.51 | |
Performance of QN1803 Stainless Steel（vs. 304）
QN1803 Stainless Steel Physical Properties (vs. 304)
| Stainless Steel Grade | QN1803 | 304 | |
| Physical Properties | Density (g/cm³) | 7.83 | 7.93 |
| Specific Heat Capacity (KJ/(kg*K)) | 0.67 | 0.50 | |
| Thermal Conductivity (W/(m*K)) | 20.7 | 16.3 | |
| Thermal Diffusivity (mm²/s) | 3.96 | 4.11 | |
| Thermal Expansion Coefficient (10⁶/K) | 16.8 | 17.2 | |
| Electrical Resistivity (Ω*mm²/m) | 0.72 | 0.73 | |
| Elastic Modulus (kN/mm²) | 196 | 193 | |
QN1803 Stainless Steel Mechanical Properties (vs. 304)
| Stainless Steel Grade | QN1803 | 304 | |
| Mechanical Properties | Thickness (mm) | 0.50 | 0.50 |
| Tensile Strength (Rm) (MPa) | 747 | 670 | |
| Yield Strength (Rp₀.₂) (MPa) | 432 | 290 | |
| Elongation (%) | 51.6 | 58.5 | |
| Hardness (HV) | 230 | 165 | |
| 180° Cold Bend | Intact | Intact | |
Comparison of Pitting Potential of QN Stainless Steels and Matching Grades
Comparison of Pitting Rates of QN Stainless Steels and Matching Grades.
Comparison of Corrosion Rate in 5% H₂SO₄ (g/(m²*h) of QN Stainless Steels and Matching Grades
Comparison of Corrosion Rate in HCL (g/(m²*h) of QN Stainless Steels and Matching Grades
QN1803 Stainless Steel Cost Advantage
In summary, QN Stainless Steel(including QN1803 stainless steel) offers the following features:
High Corrosion Resistance: Excellent resistance to various forms of corrosion.
High Strength: Superior mechanical properties, including high tensile and yield strength.
Ease of Welding: Easy to process and weld, providing flexibility in manufacturing.
Cost-Effective: The high-nitrogen, low-nickel design reduces alloy costs while maintaining high performance.
QN1803 Stainless Steel Application
1. Construction Roofing and Curtain Walls
Excellent corrosion resistance, especially in environments with sulfuric acid and hydrochloric acid.
Yield strength exceeds Q355 level, significantly higher than conventional austenitic stainless steel Q235 level, allowing for reduced material thickness and further product lightweighting.
More cost-effective than conventional stainless steel used for roofing and curtain walls.
Recommended QN stainless steel grades: QN1803.
2. Stainless Steel Decorative Welded Pipes
Superior corrosion resistance, addressing the issue of traditional decorative pipe materials being too soft with low safety factors.
More cost-effective than conventional stainless steel used for decorative welded pipes.
Recommended materials: QN1701, QN1803.
3. Drainage Pipes and Firefighting Water Pipes
High corrosion resistance to avoid rust failure during long-term standby, which is unavoidable with traditional pipe materials.
Excellent high-temperature strength, ensuring that firefighting water pipes do not soften prematurely when exposed to fire, enhancing safety and effectiveness.
More cost-effective than conventional stainless steel used for drainage and firefighting water pipes.
Recommended materials: QN1803, QN1804L.
4. Slides and Hinges
QN1803 has better corrosion resistance and strength than 304 steel, significantly extending service life.
Superior wear resistance compared to 304 steel, suitable for high-end door and window hinge products, with high wear resistance for tens of thousands of push-pull cycles.
More cost-effective than conventional stainless steel used for slides and hinges.
Recommended material: QN1803.
5. Hardware Doors
Excellent corrosion resistance, overcoming the weakness of traditional stainless steel materials being too soft with poor wind resistance and deformation resistance.
More cost-effective than conventional stainless steel used for hardware doors.
Recommended materials: QN1701, QN1803.
6. Elevator Panels
QN1803 has excellent corrosion resistance, high material hardness, and is easy to polish and wire draw.
More wear-resistant and scratch-resistant when used for elevator panels.
More cost-effective than conventional stainless steel used for elevator panels.
Recommended material: QN1803.
7. Water Tanks
QN series used in the water tank industry ensures excellent corrosion resistance and longer service life.
The copper content design provides significant antibacterial effects, reducing the risk of bacteria growth in stored water, making it safer and healthier.
More cost-effective than conventional stainless steel used for water tanks.
Recommended materials: QN1803, QN1804L.
8. Kitchen and Sanitary Products
QN1803 has superior corrosion resistance in common weak acid + salt composite conditions in kitchens compared to 304.
QN1803 has better pitting and crevice corrosion resistance than 304, making it ideal for products with gaps like floor drains.
Meets JIS antibacterial standards, with a sterilization rate of over 99.9% in 4 hours.
Heavy metal migration tests meet national standards, EU standards, and German LFGB.
Recommended materials: QN1803, QN1804L.
9. Cookware
Better corrosion resistance in common weak acid + salt composite conditions in kitchens compared to 304.
Meets JIS antibacterial standards, with a sterilization rate of over 99.9% in 4 hours.
Heavy metal migration tests meet national standards, EU standards, and German LFGB, making it food-grade cooking material.
Recommended materials: QN1803, QN1804L.
10. Refrigerated Container
QN1803 has a higher pitting potential and better resistance to chloride ion and SO₂ corrosion than 304.
Good welding performance and tensile properties at low temperatures (-40℃).
Recommended material: QN1803.
11. Livestock Equipment
QN1803 provides better corrosion resistance for livestock equipment compared to 304.
High strength of QN material ensures better resistance to livestock pressure and wear, with maintenance-free and longer service life.
Recommended materials: QN1803 (feed trough), QN1701 (fence).
12. Gas Pipes
QN1803 has better corrosion resistance than 304 stainless steel, especially in sulfur-containing corrosive environments.
Stronger negative pressure resistance with the same thickness specifications, along with excellent welding performance and wear resistance.
Recommended material: QN1803.
13. Desulfurization Towers
QN1803's corrosion resistance in sulfuric acid environments is several times that of 304, with the corrosion rate of 304 being more than six times that of QN1803 under the same conditions, making it suitable for industrial environments containing sulfuric acid.
More cost-effective than traditional conventional materials used for desulfurization towers.
Recommended material: QN1803.
Future Impact of QN Series
The QN series of stainless steel offers significant advantages over conventional steel grades with similar corrosion resistance, including:
1. Cost Reduction: QN series products can reduce production costs by more than 20% compared to conventional steel grades with equivalent corrosion resistance.
2. Superior Combination of Properties: By combining high strength, excellent corrosion resistance, and cost-effectiveness, the QN series gradually replaces some traditional high-nickel, high-cost austenitic stainless steels.
3. Innovative Leadership: The QN series is poised to become a mainstream product series in the future, leading innovations in stainless steel varieties and standards.
This forward-looking approach positions the QN series as a crucial player in the evolution of the stainless steel industry, driving both economic and technological advancements.
QN1803 Stainless Steel Sheet Package & Loading Details
WHY CHOOSE US?
We are the cold-rolled stainless steel coil production base in China with 200,000 tons capacity annually.
1. Guaranteed Stock Availability: Experiencing stock shortages during crucial times can hinder your projects. Our robust inventory management ensures a consistent supply, ready to dispatch large quantities swiftly, keeping your operations smooth and uninterrupted.
2. Comprehensive Range of Specifications: Finding the exact stainless steel coil specifications can be challenging. We offer a diverse range of specs, ensuring you find precisely what your project demands, with the assurance of our commitment to meeting your specific needs.
3. Customized Material Processing: Custom processing needs can be demanding. Our advanced facilities provide tailored solutions, from precise dimension alterations to specific finish treatments, ensuring your requirements are met with utmost precision.
4. Accurate Shearing Services: Precision is key in stainless steel utilization, and our expert shearing services guarantee exactness in every cut, aligning perfectly with your specifications and quality expectations.
5. Cost-effectiveness is crucial in supplier selection. Our optimized procurement and cost-efficient processes ensure you receive not just premium-quality products but also the best prices, offering exceptional value for your investment.
QN1803 Stainless Steel Sheet FAQ
1. Can you provide custom QN1803 stainless steel?
Absolutely, we tailor aisi QM1803 stainless steel to your needs, ensuring your specifications for thickness, width, and physical properties are met.
2. What's the delivery timeline?
Quick delivery for trial orders within a week, while regular orders range from 7-30 days.
3. How do you guarantee your QN1803 product quality?
Our QN1803 products undergo rigorous inspections during manufacturing, cutting, and packaging to ensure the highest quality. And QN1803 mill test certificate is also provided.
4. Can I get some QN1803 stainless steel samples?
We can provide QN1803 samples for you to check the quality. Sample is free and you just pay the freight.
5. How to choose a QN1803 stainless steel supplier?
Selecting a supplier for QN1803 stainless steel sheets involves a series of steps to ensure quality and reliability:
Research Suppliers: Utilize online resources to identify reputable suppliers specializing in stainless steel, focusing on those with a strong industry presence and positive reviews.
Engage with Suppliers: Contact the suppliers to discuss their QN1803 stainless steel sheet offerings, including specifications, pricing, and availability. Consider requesting samples for quality assessment.
Assess Credibility: Evaluate the suppliers' credibility by reviewing their business credentials, certifications, and customer feedback, ensuring they adhere to industry standards and best practices.
Compare Quotations: Solicit and compare quotes from various suppliers, clarifying your specific needs such as quantity, specifications, and delivery details to make an informed decision.
Verify Quality Assurance: Investigate the suppliers' quality control processes and request relevant test reports or certifications to confirm the coils meet your required standards.
Negotiate Terms: Discuss and negotiate key terms, including pricing, delivery, and payment conditions, ensuring they align with your requirements.
Order Placement: Finalize the purchase by confirming the order details, such as the coil specifications, quantities, and agreed terms.
Arrange Payment: Agree on a secure payment method that suits both parties, ensuring all financial terms are clear and documented.
Coordinate Shipping: Organize the logistics, including packaging, shipping, and customs clearance, to ensure the coils are delivered as expected.
Inspect Upon Arrival: Upon receiving the sheets, inspect the shipment for quality and accuracy, addressing any discrepancies with the supplier immediately.
