Description
Stainless Steel Coil 304 316L Supplier ASTM Standard Factory Direct — vertically integrated mill and fabrication under one roof, controlling every coil from hot rolling to final surface finish.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Stainless Steel Coil |
| Product Type | Hot Rolled / Cold Rolled Stainless Steel Coil |
| Steel Grade | 304, 304L, 316, 316L, 201, 430, 410, 420, 309S, 310S, 321, 347, 2205, 2507, 904L, 409, 441, 446 |
| Standard | ASTM A240 / A480, EN 10088-2, JIS G4304 / G4305, GB/T 3280 |
| Section Shape | Coil (slit to sheet or strip upon request) |
| Size Range | Width: 1000 mm – 2000 mm (hot rolled); 600 mm – 1500 mm (cold rolled) |
| Wall Thickness | Hot Rolled: 3.0 mm – 14.0 mm; Cold Rolled: 0.3 mm – 6.0 mm |
| Length | Coil form; slit to customer-specified length |
| Technique | Hot Rolling / Cold Rolling |
| Surface Treatment | No.1, 2B, 2D, BA, No.4, HL (Hairline), 8K Mirror, Embossed, Etched, Titanium Coating |
| Tolerance | Per ASTM A480 / EN 10088-2 |
| Ends | Mill edge / Slit edge |
| Application | Construction, chemical processing, food & beverage, medical equipment, architectural cladding, marine |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Architecture | Roofing panels, elevator interiors, column cladding, handrail systems |
| Chemical & Petrochemical | Pressure vessel shells, heat exchanger blanks, tank linings, ductwork |
| Food & Beverage | Processing tank walls, conveyor belts, brewing vessel wraps |
| Medical & Pharmaceutical | Surgical instrument blanks, cleanroom wall panels, sterilization trays |
| Marine & Offshore | Deck fittings, hatch covers, saltwater-exposed cladding |
Why 316L Outperforms 304 in Chloride-Rich Environments — A Stainless Steel Coil 304 316L Supplier Perspective
Molybdenum content in 316L prevents pitting corrosion that 304 cannot resist in coastal or chemical plant settings.
I once shipped a container of 304 cold rolled coil to a Middle East roofing contractor who later called back with rust spots along every cut edge within six months. The ambient chloride level near the Persian Gulf simply exceeded what 304 could handle. We switched the next order to 316L and the problem disappeared. Buyers sourcing a Stainless Steel Coil 304 316L supplier often assume the two grades are interchangeable — they are not when the environment carries chlorides, sulfur compounds, or elevated temperatures above 60 °C. Choosing the wrong grade means field rework, warranty claims, and reputational damage. [NEED_CITE: pitting resistance equivalent number PREN comparison between 304 and 316L stainless steel]
How Surface Finish Selection Determines Corrosion Performance and Aesthetic Outcome
A No.4 brushed finish on 304 coil hides fingerprints and minor scratches in elevator interiors, while an 8K mirror finish on 316L creates reflective architectural facades that resist salt spray. Hot rolled No.1 surface suits industrial tank linings where appearance is secondary. The cold rolling reduction ratio directly affects grain structure and final formability — a Stainless Steel Coil 304 316L supplier with both hot and cold rolling lines can match the finish to the forming severity your project demands. Our integrated mill produces over 2,800 specifications across eight surface treatments, so you source one coil grade with one consistent chemistry from slab to shipment.
Engineering Compliance: ASTM A240, EN 10088, and Customs Documentation
Structural engineers specifying stainless cladding for airports or hospitals typically reference ASTM A240 for chemical composition limits and EN 10088-2 for European projects. The Stainless Steel Coil 304 316L supplier you choose must provide mill test certificates traceable to each heat number, with chromium, nickel, and molybdenum percentages documented. Without proper certification, customs authorities in the EU may hold the shipment under REACH or Construction Products Regulation scrutiny. [NEED_CITE: EN 10088-2 stainless steel flat products technical delivery conditions] Cold rolled 2B finish coil meets most food-grade requirements, while pickled and passivated No.1 finish is preferred for chemical storage tanks.
Steel Grade Hierarchy: From 201 Economy to Duplex 2205 Strength
The 200-series (201) substitutes manganese and nitrogen for nickel, reducing cost but limiting corrosion resistance to dry indoor environments. The 300-series (304, 316L) delivers full austenitic corrosion resistance; 316L adds 2–3% molybdenum for chloride resistance. Ferritic grades (430, 409, 441) offer magnetic properties and lower nickel cost for automotive exhaust systems. Duplex grades (2205, 2507) combine austenitic and ferritic structures for superior strength and stress corrosion cracking resistance in offshore platforms. A reliable Stainless Steel Coil 304 316L supplier stocks this full range so your procurement team can consolidate orders rather than splitting across multiple vendors.
Hidden Costs of Sourcing the Wrong Grade or Missing Documentation
Ordering 304 when 316L is required leads to premature pitting, field replacement, and project delays. Receiving coil without heat-number traceability means the inspector rejects the entire batch. Missing mill test certificates trigger customs holds that cost thousands in demurrage. Negative thickness tolerance beyond ASTM A480 limits means you pay for steel that is not there. [NEED_CITE: ASTM A480 tolerance requirements for stainless steel flat products] These are not theoretical risks — they are recurring problems when buyers prioritize unit price over supply chain integrity.
Why Buyers Choose Our Vertically Integrated Mill for Stainless Steel Coil
We operate our own steel production facility with dedicated hot and cold rolling lines, meaning the Stainless Steel Coil 304 316L supplier you deal with controls chemistry from melting to final annealing. Our in-house laboratory issues mill test certificates for every heat. With over 2,800 specifications spanning 18 stainless grades and 8 surface finishes, your project team sources all coil requirements from one point of accountability. We hold CE certification for European construction products, ISO 9001 for quality management, and accept SGS or BV third-party inspection before shipment. Our logistics team designs loading plans for each coil weight and width combination, preventing edge damage during ocean transit — a lesson learned the hard way years ago when improper stowage ruined an entire container.
Documentation & Compliance
- Mill test certificate documenting 304 and 316L chemical composition (Cr, Ni, Mo) and mechanical properties per ASTM A240
- CE certificate confirming compliance with EN 10088-2 for European construction projects
- ISO 9001 quality management certificate covering the full coil production process
- SGS or BV third-party inspection report available upon request for critical projects
- Material traceability by heat number stamped on each coil edge
- Customs documents including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- Cold rolled 2B and BA finish coils wrapped in moisture-proof kraft paper with steel strip banding to protect surface during ocean transit
- Hot rolled No.1 coils packed with edge protectors to prevent edge wave damage for widths exceeding 1500 mm
- Mirror finish 8K coils individually wrapped in PE film with cardboard sleeves to prevent scratching
- Custom slit-to-length sheets interleaved with protective paper and palletized for container loading
- Each coil marked with heat number, grade, thickness, and width for site identification
- FOB, CIF, and DDP terms available with professional oversized coil loading plans
Start Your Inquiry with Drawings and Specifications
Share your project drawings, required grade, surface finish, thickness, width, and destination port — we respond within 24 hours with pricing, mill test certificate samples, and a production timeline. For non-standard widths or duplex grades, our engineering team reviews feasibility before you commit. Confirm your certification requirements and we prepare the full documentation package alongside your shipment.
Frequently Asked Questions
Q: Can you supply 316L coil in cold rolled 2B finish with ASTM A240 certification?
A: Yes. We produce 316L in both hot rolled and cold rolled conditions, with 2B, BA, No.4, and mirror finishes available. Every coil ships with a mill test certificate conforming to ASTM A240 chemical and mechanical requirements.
Q: What is the minimum order quantity for stainless steel coil?
A: Our MOQ is 1 ton per grade and finish combination. Mixed orders across different grades are accepted for container-load shipments.
Q: Do you provide third-party inspection before shipment?
A: Yes. We accept SGS, BV, or your nominated inspection agency at our facility before loading. Inspection reports are included in the shipping document package.
Q: Can you slit master coils to custom widths?
A: Yes. Our slitting lines handle widths from 600 mm to 2000 mm with tolerance per ASTM A480. Share your width requirements and we confirm feasibility and lead time.
Q: How do you ensure coil edges are not damaged during shipping?
A: Each coil receives edge protectors, moisture-proof wrapping, and steel strip banding. Our loading team designs stowage plans based on coil weight and width to prevent shifting and edge contact during ocean transit.
Request Your Stainless Steel Coil Quote Today
Send your specifications — grade, finish, thickness, width, quantity, and destination port — 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
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
