Description
Direct Mill Supply, Full Grade Coverage — 304, 316L, and duplex grades produced and processed under one integrated quality system from raw slab to finished coil.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | 304/316L Stainless Steel Coil |
| Product Type | Steel Coil / Sheet / Plate / Strip |
| Steel Grade | 201, 301, 304, 310S, 316, 316L, 321, 405, 409L, 410, 410L, 420, 430, 430A, 309S, 2205, 2507, 2520, 904L |
| Standard | ASTM, JIS, GB, AISI, DIN, BS, EN |
| Thickness | Cold rolled 0.15–3mm; Hot rolled 3–120mm |
| Width | 1000mm / 1219mm / 1500mm (slit to narrow width available) |
| Length | 2000mm / 2438mm / 2440mm / 3048mm or customized |
| Technique | Cold Rolled / Hot Rolled |
| Surface Treatment | 2B, 2D, BA, 8K, HL (Hairline), No.4, Embossed, Colored |
| Certificate | ISO 9001, BV, SGS, TUV |
| Packing | Waterproof paper + steel strapping + pallet; BA and 8K with PVC film |
| Delivery | 7–10 working days (subject to order quantity) |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Food & Medical | Hygienic processing tanks, surgical instrument housings, dairy equipment panels |
| Chemical & Petroleum | Chloride-resistant storage tanks, heat exchanger shells, process piping spools |
| Architectural & Construction | Elevator interior panels, facade cladding, decorative ceiling systems |
| Kitchen & Catering | Commercial kitchen worktops, splashbacks, range hood enclosures |
| Industrial Equipment | Conveyor components, filtration housings, silo liners |
Surface Finish Selection Determines Whether Your Coil Passes Site Inspection
A mirror-polished 8K coil arriving with micro-scratches is rejected on the spot — no amount of paperwork fixes visible surface damage.
When buyers source stainless steel coils from fragmented suppliers, the surface finish often arrives inconsistent — BA finish from one batch looks noticeably different from the next, and 8K mirror polish shows uneven reflectivity across the coil width. Without integrated processing control, coating thickness and grain direction vary between shipments. [NEED_CITE: stainless steel surface finish Ra value standards for architectural applications]
Matching Coil Finish to Engineering Environments
A 316L coil with 2B finish serves food processing tanks where corrosion resistance matters more than appearance, while the same grade in 8K mirror polish goes into elevator interiors where visual consistency is the primary acceptance criterion. Our processing line handles cold rolled coils from 0.15mm through to hot rolled plates at 120mm thickness, all under one quality management system — meaning the 304 316L stainless steel coil supplier you work with controls every stage from slab reheating to final surface treatment.
Corrosion Resistance, Certification, and Customs Compliance
Duplex grades like 2205 and 2507 are specified for chloride-heavy environments in chemical plants and offshore platforms, where pitting resistance matters more than formability. For EU projects, EN-compliant material documentation is mandatory at customs; for North American shipments, ASTM grade designation must match mill certificates exactly. [NEED_CITE: stainless steel grade equivalence between ASTM and EN standards] Third-party inspection from SGS, BV, or TUV verifies dimensional accuracy and surface quality before shipment, preventing costly rejections at destination ports.
Understanding Grade Selection and Rolling Process
The 300-series austenitic grades — 304, 316L, 321 — offer excellent formability and weldability, with 316L providing superior chloride resistance through molybdenum addition. The 400-series ferritic and martensitic grades — 410, 420, 430 — deliver higher hardness and magnetic properties at lower cost, suitable for decorative and structural applications where extreme corrosion resistance is not required. Duplex grades 2205 and 2507 combine austenitic and ferritic structures for high strength and chloride resistance in demanding chemical environments. Cold rolling produces tighter thickness tolerance and smoother surface finish for gauges below 3mm, while hot rolling handles heavier sections up to 120mm where formability requirements are less critical.
The Hidden Cost of Unverified Material Origin
When a fabricator sources coils from multiple third-party mills without traceability, heat numbers on mill certificates may not match the physical material delivered. Customs authorities in the EU and Middle East increasingly reject shipments where chemical composition documentation cannot be traced to specific heat lots. [NEED_CITE: material traceability requirements for stainless steel imports under EU regulations] The result is not just a delayed shipment — it is structural rework, project schedule overruns, and potential safety liability if off-spec material reaches the installation stage.
Why Source Your 304 316L Stainless Steel Coil Supplier From an Integrated Mill
Our own steel production facility operates multiple rolling lines covering the full thickness range from 0.15mm cold rolled to 120mm hot rolled, eliminating the gap between material supplier and processor. Every coil carries full material traceability from melt to finish, supported by our in-house理化实验室 testing chemical composition, mechanical properties, and surface quality before release. We stock over 2,800 specifications across all major stainless steel grades, meaning your 304 316L stainless steel coil supplier can fulfill mixed-grade orders without splitting procurement across multiple vendors. Certified welding procedures and qualified quality documentation — including WPS, PQR, and dimensional inspection reports — accompany every shipment for international project compliance.
Documentation & Compliance
- Mill Test Certificate documenting 304 and 316L chemical composition including carbon, chromium, nickel, and molybdenum content per ASTM A240
- ISO 9001:2015 quality management certificate verified by TUV covering the full production and processing chain
- SGS, BV, or TUV third-party inspection report verifying surface finish quality, dimensional tolerance, and coating thickness
- Material traceability by heat number from raw slab to finished coil, supporting EN 10204 3.1/3.2 certification requirements
- Customs documentation including packing list, bill of lading, and certificate of origin formatted for EU, Middle East, and Southeast Asian clearance
Packaging, Loading & Delivery
- Cold rolled 304 and 316L coils packed with waterproof paper inner layer and steel strapping, with PVC film protection for BA and 8K finish to prevent surface scratching during ocean transit
- Hot rolled plates and heavy-gauge coils secured on steel pallets with edge protectors, optimized for 20ft and 40ft container loading based on coil weight and width
- Custom slit widths and cut-to-length sheets marked with heat number, steel grade, and thickness at both ends for on-site identification
- BA and 8K mirror finish coils wrapped with interleaving paper and shrink film to preserve surface quality through multiple handling stages
- FOB, CIF, and DDP shipping terms available with professional oversized cargo loading and complete export documentation tracking
Requesting a Quotation for Your Project
Share your project specifications including steel grade, thickness, width, surface finish, and required quantity to receive a detailed quotation with material cost, processing charges, and delivery timeline within 24 hours. Confirm your required certification standard — ASTM, EN, or JIS — and whether third-party inspection is needed for your destination market. Our engineering team reviews your requirements and provides material optimization recommendations before production begins.
Frequently Asked Questions
Q: What is the difference between 304 and 316L for food processing applications?
A: Both grades meet food contact standards, but 316L contains molybdenum which provides superior resistance to chloride corrosion from cleaning agents and salt-containing products. For general food processing where chloride exposure is minimal, 304 with 2B finish is typically sufficient.
Q: Can you provide custom slit widths for narrow coil requirements?
A: Yes, our processing line supports slitting from standard master coil widths of 1000mm, 1219mm, and 1500mm down to narrower widths as required. Tolerance and minimum order quantity depend on the specific thickness and grade.
Q: What surface finish options are available for architectural applications?
A: We offer 2B for general purpose, BA (bright annealed) for kitchen and electronics, 8K mirror polish for decorative panels, HL and No.4 hairline for elevator interiors and cladding, and embossed patterns for customized architectural designs.
Q: Do you provide third-party inspection for EU customs clearance?
A: Yes, SGS, BV, and TUV inspection reports are available covering dimensional accuracy, surface quality, and chemical composition verification. Full mill test certificates with heat number traceability support EN 10204 3.1/3.2 requirements.
Q: How are BA and 8K finish coils protected during shipping?
A: BA and 8K coils receive additional PVC film wrapping and interleaving paper protection beyond standard waterproof paper and steel strapping packaging, preventing surface scratches and preserving mirror finish quality through ocean freight.
Get Your 304 316L Stainless Steel Coil Quote With Full Mill Certification
Submit your specifications — grade, thickness, width, surface finish, and quantity — to receive pricing and mill test certificate samples within 24 hours.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.xjystructure.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@xjystructure.com
