Thin Gauge Cold Rolled Full Hard Coils (CRFH)
Thin Gauge Cold Rolled Full Hard Coils are unannealed high-precision steel products manufactured through precise cold rolling reduction. By retaining the work-hardening effect, these coils offer exceptional tensile strength, superior hardness, and excellent thickness uniformity-making them the premium base material for subsequent galvanizing, color coating, and precision forming.
We supply high-quality Thin Gauge Cold Rolled Full Hard Coils for global industrial customers, including steel processors, automotive component manufacturers, appliance producers, metal fabrication companies, and coating manufacturers. Focused on providing reliable cold rolled steel solutions, we ensure controlled thickness tolerances, consistent mechanical properties, excellent surface quality, and stable international delivery.
Our Thin Gauge Cold Rolled Full Hard Coils can be fully customized according to customer requirements, including steel grade, thickness, width, coil weight, surface condition, and packaging specifications.
Product Advantages
High Tensile Strength & Structural Rigidity
The severe cold rolling reduction process increases the yield and tensile strength of the steel. Our thin-gauge coils maintain high structural stability, allowing downstream manufacturers to produce lighter yet stronger end-products.
Superior yield-to-tensile ratio suitable for high-tension processing lines.
High rigidity perfect for roll-formed profiles and industrial structural parts.
Minimal springback variation during subsequent roll forming.
Micro-Level Thickness Tolerance
Utilizing advanced Automatic Gauge Control (AGC) systems, we guarantee ultra-precise thickness control across the entire length of the coil.
Consistent gauge tolerance to prevent machine jamming in high-speed automatic stamping lines.
Uniform sheet profile that extends the lifespan of your stamping dies and cutting tools.
Consistent thickness across the coil width to ensure perfect flatness.
Pristine Surface Quality for Coating Operations
Our strict hot-rolled strip selection and acid pickling processes eliminate scale and surface defects, leaving a clean, smooth, and consistent surface finish.
Optimal surface roughness (Ra) engineered for zinc adhesion in hot-dip galvanizing.
Excellent chemical adhesion properties for color-coated/pre-painted (PPGI) production.
Oiled or dry options tailored to your storage and processing requirements.
Product Specifications
|
Technical Parameter |
Specification Range & Customization |
|
Standard Compliance |
ASTM A109 / JIS G3141 / EN 10139 |
|
Available Steel Grades |
SPCC-1B, SPCD, SPCEN (Full Hard Condition) |
|
Thickness Range |
0.12 mm - 2.00 mm |
|
Width Range |
600 mm - 1500 mm |
|
Thickness Tolerance |
Micro-level tolerance (Details based on thickness & standard) |
|
Coil Inner Diameter (ID) |
508 mm / 610 mm |
|
Coil Weight |
3.0 - 15.0 Metric Tons (Customizable to your lifting capacity) |
|
Surface Treatment |
Bare / Oiled (Lightly oiled or heavily oiled for rust prevention) |
|
Edge Finish |
Mill Edge / Slit Edge |
Controlled Manufacturing Process
We ensure complete traceability and quality consistency through a closed-loop manufacturing flow:
Premium Hot Rolled Selection: We source clean, chemically stable hot-rolled bands as raw materials.
Acid Pickling Line: Thorough removal of oxide scale to ensure a clean surface substrate.
Cold Rolling (AGC Mills): Precision thickness reduction under continuous thickness-gauge monitoring.
Tension Leveling: Improving coil flatness and removing internal stress.
On-Line Inspection: Checking width, thickness, flatness, and surface finish.
Export Standard Packaging: Heavy-duty, multi-layer wrapping to prevent maritime transit damage.
Strict Quality Control & Global Compliance
Continuous Verification & Traceability
Every batch of Thin Gauge Cold Rolled Full Hard Coils undergoes strict testing protocols to ensure full quality traceability. We provide a Mill Test Certificate (MTC) conforming to EN 10204 3.1 with every shipment, covering:
Chemical Spectrometer Analysis: Verifying exact heat analysis and element distribution.
Mechanical Property Testing: Confirming tensile strength, yield strength, and elongation limits.
Hardness Testing (Rockwell / Vickers): Ensuring the coil meets the HRB 85 minimum standard.
Micrometer Dimensional Check: Continuous thickness, width, and flatness tolerance validation.
Seaworthy Export Packaging
To ensure your steel coils arrive in pristine condition, completely free of rust or physical deformation, we use a specialized 5-Layer Seaworthy Protective System:
Layer 1: Anti-corrosive VCI (Volatile Corrosion Inhibitor) film wrapped directly around the steel surface.
Layer 2: Heavy-duty waterproof plastic wrapping to block moisture and sea spray.
Layer 3: High-strength kraft paper protection for structural shielding.
Layer 4: Galvanized steel sheet outer wrap with metal inner/outer corner protectors.
Layer 5: Radial and circumferential high-tensile steel straps locked with heavy metal seals.
Logistics Loading: Coils are secured on heavy timber skids or loaded eye-to-sky/eye-to-wall inside containers with heavy-duty wood blocking and silica gel desiccants.
FAQ
