Description
Direct Mill Supply — Every DC01–DC06 cold rolled coil produced and tested on our own 3 production lines.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Cold Rolled Steel Sheet DC01-DC06 / SPCC |
| Product Type | Steel Plate / Steel Sheet |
| Steel Grade | DC01, DC02, DC03, DC04, DC05, DC06, SPCC, DC51D+Z, DC52D+Z, DC53D+Z, DC54D+Z, DC56D+Z, S220GD+Z, S250GD+Z, S280GD+Z |
| Standard | AISI |
| Thickness | 0.11–5.0 mm |
| Width | 600–1500 mm |
| Length | As buyer requirement |
| Technique | Cold Rolled |
| Surface Treatment | Non-oiled / Normal Oiled / Slightly Oiled |
| Tolerance | ±1% |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling, Annealed, Black Annealed |
| Skin Pass | Yes |
| Alloy | Non-Alloy |
| Grade Category | Carbon Steel |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Automotive | Body panels, door skins, chassis brackets, fuel tank shells requiring deep drawing |
| Appliance | Washing machine drums, refrigerator side panels, microwave oven housings |
| Construction | Roofing sheets, wall cladding panels, light steel keel, purlin profiles |
| Machinery Manufacturing | Control cabinets, machine guards, electrical enclosures, conveyor covers |
What Thickness Tolerance Gaps Cost on a Deep Drawing Order
A 0.05 mm negative tolerance deviation on DC04 cold rolled sheet can trigger full-container rejection at destination port.
Buyers sourcing Cold Rolled Steel Sheet DC01 DC04 SPCC supplier from overseas often discover tolerance inconsistencies only after third-party inspection at the discharge port. Material sourced through trading companies rather than integrated mills creates traceability gaps — the mill test certificate may reference a different heat number than the coils actually shipped. Surface quality issues like rolling oil stains or edge wave defects compound the problem when sheets are destined for exposed appliance panels or automotive outer skins. [NEED_CITE: cold rolled steel tolerance standards for deep drawing applications]
Matching Cold Rolled Grades to Forming Complexity
Deep drawing applications in automotive and appliance sectors demand precise grade selection across the DC01–DC06 range. DC01 serves general forming where moderate draw depth suffices, while DC04 and DC05 handle complex stamping operations requiring higher elongation and uniform grain structure. DC06 covers the most severe drawing conditions — fuel tank shells and transmission housings that cannot tolerate splitting or surface tearing. Our cold rolling lines produce the full spectrum from commercial quality SPCC to extra-deep drawing DC06, with skin pass treatment applied to every coil to ensure surface flatness and consistent mechanical properties across the width.
Engineering Compliance and Certification Requirements
Cold rolled sheets exported to EU markets require EN 10204 3.1 mill test certificates documenting chemical composition and mechanical properties per heat number. North American buyers often specify ASTM A366 or A611 equivalents, while Southeast Asian construction projects may demand compliance with JIS G3141 for SPCC grades. The Cold Rolled Steel Sheet DC01 DC04 SPCC supplier must provide complete documentation packages including coating thickness reports for galvanized variants (DC51D+Z through DC56D+Z) and structural grade certificates for S220GD+Z through S280GD+Z used in load-bearing cladding systems. [NEED_CITE: EN 10204 inspection certificate types for steel products]
Cold Rolling Process and Surface Finish Control
Cold reduction of hot rolled coils through multi-stand mill configurations achieves the precise thickness control and surface finish required for downstream fabrication. The process increases strength through strain hardening while maintaining the formability characteristics specified by each DC grade designation. Skin pass rolling — a light final reduction of 0.5–2% — eliminates yield point elongation that causes Lüders lines (stretcher strains) on formed surfaces, critical for visible appliance panels and automotive components. Surface treatment options include non-oiled for immediate painting, normal oiled for standard corrosion protection during transit, and slightly oiled for environments requiring minimal residue before coating.
Hidden Costs of Sourcing from Non-Integrated Suppliers
Procuring Cold Rolled Steel Sheet DC01 DC04 SPCC supplier materials through intermediaries introduces material substitution risks where actual chemistry deviates from certificate claims. Negative tolerance exceeding contractual limits forces buyers to either accept reduced structural capacity or renegotiate pricing after goods have already shipped. Missing or forged mill test certificates trigger customs holds in markets with strict import documentation requirements, delaying project timelines and incurring port storage charges. Surface defects like oil stains, rust patches, or edge cracks discovered during fabrication cause scrap losses that exceed the initial price savings from choosing a lower-cost supplier. [NEED_CITE: material traceability requirements in structural steel fabrication]
Why Integrated Mill Production Matters for Cold Rolled Quality
Our facility operates three dedicated cold rolling lines producing DC01 through DC06 grades in thicknesses from 0.11 mm to 5.0 mm, eliminating the material sourcing gaps that plague trading company supply chains. Every coil carries full traceability from hot rolled input through cold reduction, annealing, and skin pass treatment — heat numbers on certificates match physical markings on each coil. The integrated operation means we control chemistry at the steelmaking stage, not just verify it after the fact. Our quality laboratory performs tensile testing, hardness measurement, and surface inspection per ISO 9001 protocols before any shipment leaves Jinan. Third-party inspection through SGS, BV, or Intertek is available for buyers requiring independent verification. We supply over 2,800 steel specifications across our product range, allowing consolidation of multiple cold rolled grades and surface treatments in single shipments to reduce logistics costs.
Documentation & Compliance
- Mill test certificate (EN 10204 3.1) documenting DC04 chemical composition, yield strength, tensile strength, and elongation per heat number
- ISO 9001 quality management system certificate covering cold rolling, annealing, and skin pass processes
- SGS/BV/Intertek third-party inspection report verifying thickness tolerance, surface quality, and mechanical properties
- Material traceability sheet linking coil identification numbers to specific heat numbers and production dates
- Certificate of origin and commercial invoice formatted for destination country customs clearance
- Packing list detailing coil weights, dimensions, surface treatment type, and bundle count per container
Packaging, Loading & Delivery
- Coils packed in eye-to-sky or eye-to-wall orientation with inner plastic wrap and outer steel sheet protection to prevent edge damage during ocean transit
- Surface treatment (oiled/non-oiled) clearly marked on coil tags and outer packaging to prevent confusion at destination
- Coil weights optimized for 20-foot and 40-foot container payloads, with typical loading of 20–25 tons per FCL depending on thickness and width
- Cut-to-length sheets bundled with steel straps and wooden pallets for LCL shipments, with interleaving paper between sheets to prevent surface scratching
- Heat number and grade identification stamped on coil inner diameter and documented on packing list for traceability verification
- FOB Qingdao port pricing available, with CIF and DDP options to major destinations including Southeast Asia, Middle East, and EU ports
How to Request a Quotation with Complete Documentation
Submit your technical requirements including steel grade (DC01–DC06, SPCC, or galvanized equivalents), thickness and width specifications, surface treatment preference, and destination port to receive pricing with mill test certificate samples. Specify whether third-party inspection is required and confirm any special packaging needs for sensitive surface finishes. Our engineering team reviews drawing requirements for cut-to-length or slit edge specifications and responds within 24 hours with technical and commercial proposals.
Frequently Asked Questions
Q: What is the difference between DC01, DC04, and DC06 grades for deep drawing applications?
A: DC01 is commercial quality suitable for general forming with moderate draw depths. DC04 offers deep drawing capability with higher elongation for complex stamping operations like appliance housings. DC06 provides extra-deep drawing properties for severe forming conditions such as automotive fuel tanks where splitting risk must be minimized.
Q: Can you provide third-party inspection reports for cold rolled sheets?
A: Yes, we arrange SGS, BV, or Intertek inspection at our facility before shipment. The inspection covers thickness measurement, surface quality, mechanical testing, and dimensional verification. Reports are issued within 3 working days after inspection completion.
Q: What surface treatment options are available for corrosion protection during storage?
A: We offer non-oiled surfaces for immediate painting applications, normal oiled surfaces providing standard rust prevention during 3–6 month storage periods, and slightly oiled surfaces for environments where minimal oil residue is acceptable before coating.
Q: What is the minimum order quantity for cold rolled steel sheets?
A: The MOQ is 1 ton for standard grades and thicknesses in our production range. Custom cut-to-length sheets may have higher minimums depending on width and length specifications.
Q: Do you provide mill test certificates with each shipment?
A: Yes, every shipment includes EN 10204 3.1 mill test certificates documenting chemical composition and mechanical properties for each heat number. Certificates are available in English and match the heat number markings on each coil.
Request Cold Rolled Steel Sheet DC01 DC04 SPCC Supplier Pricing
Send your specifications including grade, thickness, width, quantity, and destination port to receive a detailed quotation with mill test certificate samples within 24 hours.
Contact: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Email: admin@xjystructure.com
WhatsApp/WeChat: +86 188 5315 7756
