Description
The Real Story Behind Our Cold Rolled Full Hard Steel Coils
When you’re stamping complex automotive brackets or building heavy-duty appliance frames, material consistency makes or breaks your production line. That’s where our full hard steel coils step in – not just meeting specs, but anticipating your needs.
We don’t just roll steel; we engineer solutions. Our full hard designation means we’ve pushed the material to its optimal yield strength (typically 380-450 MPa) through controlled cold reduction and precise annealing. The result? Coils that hold their shape during deep drawing yet won’t crack when bent at 90° with a tight radius. One appliance maker reported 15% fewer die adjustments after switching to our coils with consistent 0.2mm thickness tolerance.
What Actually Matters in Real-World Use
- Dimensional stability – Our ±0.005mm thickness tolerance isn’t just a number; it means your CNC press won’t need constant recalibration between batches
- Surface integrity – The 0.6-0.8μm Ra finish we achieve reduces coating prep time, with one furniture client cutting their painting cycle time by 20%
- Edge condition options – Whether you need mill edge for structural applications or slit edge for precision stamping, we’ve got you covered (literally – our slit burr height stays under 5μm)
- Hardness that works with you – 85-95 HRB might sound technical, but it means your metal forming tools last longer while still allowing complex shapes
We run every coil through our in-line laser gauges, not just spot checks. And unlike some suppliers who claim “full hard” but deliver inconsistent hardness across the coil width, we maintain uniform 170-200 HV through our proprietary tension-leveling process.
The China Advantage, Done Right
Being based in China’s steel heartland gives us two key benefits: access to premium base metal and deep process expertise. We don’t just follow standards like ASTM A1008 or EN 10130 – we exceed them. Need a special 2.75mm thickness with SPCE grade? Or perhaps a matte finish with specific oil coating for your outdoor furniture? We’ve handled these requests before.
Our typical coil weights range from 5-20MT, but we’re flexible – the same equipment that handles automotive runs can produce smaller batches for specialty applications. Just last month we fulfilled an order for 3MT coils with custom 800mm width for a medical equipment manufacturer.
Talk to us about your real challenges – whether it’s reducing material waste in your stamping operation or finding the right balance between hardness and formability. We’ve probably solved something similar before, and if not, we’ll work with you to develop a solution.
