440 Stainless Steel Coil
What is 440 Stainless Steel Coil?
Grade 440C stainless steel is a high-carbon, martensitic stainless steel known for its superior strength, hardness, and wear resistance. With moderate corrosion resistance, it stands out among stainless alloys for its exceptional performance after heat treatment. The high carbon content imparts these remarkable properties, making 440C ideal for demanding applications such as ball bearings and valve parts. Its ability to achieve the highest strength, hardness, and wear resistance of all stainless steels makes it a top choice for industries requiring durable and reliable materials.
Features of 440 Stainless Steel Coil
CORROSION RESISTANCE:
Good resistance to atmosphere, fresh water, food, alkali and weak acid. Best resistance in hardened and tempered and passivated condition. Smooth polished surface also helps. Corrosion resistance of grade 440C approaches that of grade 304 in many environments.
HEAT RESISTANCE:
Use at temperatures above the appropriate tempering temperature is not recommended, as excessive tempering reduces mechanical properties.
HEAT TREATMENT:
Annealing - full annealing - 850-900°C, slow furnace cooling to about 600°C and subsequent cooling in air. Subcritical annealing - 735 - 785°C and slow furnace cooling.
Hardening - heating to 1010-1065 °C followed by quenching in hot oil or in air. In case of heavy profiles, quenching in oil is necessary. Immediate tempering at 150-370°C gives a wide range of hardness values and mechanical properties as shown in the attached table.
Tempering in the range 425-565°C should be avoided due to reduced impact and corrosion resistance. Tempering in the range of 590-675°C results in lower hardness (the product becomes machinable) and high impact resistance.
WELDING：
If welding is required, preheat at 250 °C and complete annealing after welding. 420 filler metal will produce a weld with high hardness (although not as high as 440C), while 309 or 310 will produce a soft weld with higher ductility.
440 Stainless Steel Chemical Composition & Technical Data Sheet
440 Stainless Steel Standards Comparison
| STS | USA | UNS | CHINA | EURONORM | RUSSIA | SWEDISH | JAPANESE | |
| GRADE | AISI/ASTM | NO | GB | NO | NAME | GOST | SS | JIS |
| 440A | 440A | S44002 | 12Cr13 | 1.4109 | X65Cr13 | - | 10088-1 | SUS 440A |
| 440C | 440C | S44004 | 40Cr13 | 1.4125 | X105CrMo17 | 95X18 | 10088-3 | SUS 440C |
440 Stainless Steel Chemical Composition
| Grade | Standard | Chemical Composition(%) | ||||||
| C | Si | Mn | P | S | Cr | Mo | ||
| 440A | ASTM 440A | 0.60~0.75 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 16.00~18.00 | ≤0.75 |
| 440C | ASTM 440C | 0.95~1.20 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 16.00~18.00 | ≤0.75 |
440 Stainless Steel Mechanical Properties
| Grade | Tensile Test | Hardness Test | |||
| 0.2% Y.S(Mpa) | T.S(Mpa) | Elongation(%) | Hardness | HBN | |
| 440A | 415 | 725 | ≥20 | Annealed | 95 |
| 440C | 450 | 760 | ≥14 | Annealed | 97 |
440 Stainless Steel Finish & Application
ASTM 440C steel is renowned for its exceptional wear resistance and adequate corrosion resistance, making it suitable for various demanding applications:
Cutlery and Kitchen Tools: The high carbon content and resulting hardness make 440C stainless steel ideal for high-quality knife blades, ensuring sharp edges over prolonged use. It is commonly used for kitchen knives, hunting knives, and professional chef's knives.
Surgical Instruments: The precision and edge retention of 440C stainless steel make it perfect for surgical scalpels. These instruments must maintain extreme sharpness and resist wear during surgical procedures.
Automotive and Aerospace: Engine components requiring high wear resistance and the ability to withstand high stress and temperature conditions benefit greatly from the properties of 440C stainless steel. It is used in parts that demand durability and reliability under challenging operational environments.
440 Stainless Steel Coil 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.
440 Stainless Steel Coil FAQ
1. Can you provide custom 440 stainless steel?
Absolutely, we tailor 440 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 440 steel product quality?
Our 440 products undergo rigorous inspections during manufacturing, cutting, and packaging to ensure the highest quality. And 440 mill test certificate is also provided.
4. Can I get some 440 steel samples?
We can provide 440 steel samples for you to check the quality. Sample is free and you just pay the freight.
5. How to choose a 440 stainless steel supplier?
Selecting a supplier for 440 stainless steel coils 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 440 stainless steel coil 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 coils, inspect the shipment for quality and accuracy, addressing any discrepancies with the supplier immediately.
6. What is the 440 stainless steel price?
Usually the approximate 440 stainless steel sheet price is more than 1050 US dollars/sheet. The actual price will fluctuate based on exchange rates, market conditions, etc. For details, please contact us for a quote.
More information of 440 material, please kindly browse to our article: What Is 440 Stainless Steel Composition, Applications, And Advantages
