304 Stainless Steel Coil - Cold Rolled & Annealed, ASTM A240, 0.3-3.0mm Thickness

304 stainless steel coil represents the most widely specified austenitic stainless steel material in global manufacturing and industrial applications. This versatile chromium-nickel alloy delivers exceptional corrosion resistance, superior formability, and cost-effective performance across diverse industries including food processing, architectural fabrication, automotive components, and chemical equipment. Available in cold rolled and annealed conditions with thickness ranging from 0.3mm to 3.0mm, our 304 coils comply with ASTM A240 standards and serve manufacturers seeking reliable material solutions for both decorative and functional applications.

What is 304 Stainless Steel Coil?

304 stainless steel coil is an austenitic chromium-nickel alloy containing 18-20% chromium and 8-10.5% nickel, manufactured in continuous coil form through cold rolling processes. The material exhibits a face-centered cubic crystal structure that provides excellent ductility and work-hardening characteristics. This grade is the workhorse of the stainless steel family, offering optimal balance between corrosion resistance, mechanical properties, and economic value. The cold rolled and annealed condition ensures uniform thickness tolerance of ±0.05mm and surface finish options ranging from 2B mill finish to BA bright annealed, making it ideal for applications requiring consistent quality and aesthetic appearance.

304 Stainless Steel Coil Technical Specifications

Our 304 stainless steel coil is manufactured according to ASTM A240/A240M-20a standards with chemical composition limits of 0.08% carbon maximum, 2.0% manganese maximum, and 0.045% phosphorus maximum. The material demonstrates tensile strength of 515 MPa minimum and yield strength of 205 MPa minimum at 0.2% offset. Elongation in 50mm reaches 40% minimum, confirming superior formability for deep drawing and complex forming operations. The density measures 7.93 g/cm³ at 20°C, while thermal conductivity stands at 16.2 W/m·K at room temperature. Available widths range from 1000mm to 1524mm with standard coil inner diameter of 508mm or 610mm, accommodating various slitting and processing requirements.

Key Advantages of Cold Rolled 304 Coil

The cold rolling process imparts superior surface quality and dimensional precision compared to hot rolled alternatives. Our 304 coils exhibit surface roughness Ra values below 0.4μm in 2B finish, ensuring excellent reflectivity and cleanability for sanitary applications. The annealing treatment following cold reduction eliminates work hardening while maintaining fine grain structure, resulting in optimal combination of strength and ductility. This processing route produces material with exceptional flatness tolerance of ±3mm per meter, critical for automated stamping and laser cutting operations. The tight thickness control enables manufacturers to optimize material utilization and reduce scrap rates in high-volume production environments.

Primary Applications and Industry Uses

304 stainless steel coil finds extensive application in food and beverage equipment manufacturing, where its non-reactive surface and easy cleaning properties meet stringent hygiene standards. Kitchen appliance producers utilize this material for refrigerator panels, dishwasher tubs, and countertop surfaces due to its resistance to organic acids and alkalis. The architectural sector employs 304 coils for elevator panels, column covers, and decorative trim where moderate corrosion resistance suffices in indoor environments. Automotive manufacturers specify this grade for exhaust system components, trim moldings, and structural reinforcements benefiting from its formability and spot welding compatibility. Chemical processing industries rely on 304 for storage tanks, piping systems, and reactor vessels handling non-chloride-containing solutions at temperatures below 400°C.

Quality Certifications and Compliance

All 304 stainless steel coil shipments include mill test certificates per EN 10204 Type 3.1, documenting chemical analysis results from spectrometric testing and mechanical property verification through tensile testing. Our manufacturing facilities maintain ISO 9001:2015 quality management certification and ISO 14001:2015 environmental management certification. Material traceability extends from raw material heat numbers through final coil identification, ensuring complete documentation for critical applications. Third-party inspection services from SGS, TÜV, or Bureau Veritas can be arranged upon request. The production process incorporates in-line ultrasonic testing to detect internal defects and automated surface inspection systems to identify cosmetic imperfections before shipment.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard minimum order quantity for 304 stainless steel coil is 5 metric tons per specification. For stock sizes in 2B finish with common thicknesses (0.5mm, 0.8mm, 1.0mm, 1.2mm), we can accommodate smaller quantities of 1 metric ton. Mixed container loading is available for customers requiring multiple thickness or width combinations to reach economic shipping volumes.

Do you provide material test certificates?

Yes, we provide comprehensive mill test certificates (MTC) per EN 10204 Type 3.1 with every shipment, including chemical composition analysis, mechanical properties verification, heat treatment records, and dimensional inspection results. Certificates are issued in English and include full traceability to raw material heat numbers. Digital copies are available via email prior to shipment for customer approval.

What is the typical delivery time?

For stock items in standard specifications, delivery time is 7-10 working days from order confirmation. Custom orders requiring specific dimensions, surface finishes, or additional processing typically require 25-30 days production lead time. Express production can be arranged for urgent requirements with 15-day delivery for additional surcharge. Transit time varies by destination port, ranging from 15-35 days for major international ports.

Can you cut to custom sizes?

We offer comprehensive slitting services to cut master coils into custom widths with tolerance of ±1mm. Sheet cutting from coil is available for lengths up to 6000mm with precision shearing equipment maintaining squareness within 2mm per meter. Edge conditioning options include deburred edges, rounded edges, or slit-edge protection film. Blanking to specific rectangular dimensions can be arranged for high-volume orders requiring consistent piece dimensions for automated processing.

Get a Competitive Quote for 304 Stainless Steel Coil

Our mill-direct sourcing and efficient logistics network enable us to offer factory-competitive pricing on 304 stainless steel coil while maintaining strict quality standards. We provide transparent quotations including material cost, processing charges, packaging, and delivery to your specified location. Volume discounts apply for orders exceeding 20 metric tons, and long-term supply agreements offer additional price stability and priority allocation during market fluctuations. Our technical sales team provides professional consultation on material selection, surface finish options, and processing recommendations to optimize your manufacturing efficiency.

• 24/7 customer support available via phone, email, and online chat
• Free samples for quality evaluation - up to 3 pieces per specification
• Competitive pricing for bulk orders with volume discount tiers
• Professional technical consultation on forming, welding, and finishing processes
• Flexible payment terms including L/C, T/T, and trade credit for qualified customers
• Comprehensive after-sales support including material performance troubleshooting

Contact us today to get your free quote within 24 hours! Our experienced team is ready to discuss your specific requirements and recommend the optimal 304 stainless steel coil solution for your application.