Why Material Type Matters in Coil Processing

In the metal coil processing industry, understanding the material you're working with is essential to achieving high precision, efficiency, and durability. Two of the most common coil materials are stainless steel and galvanzied steel - but each brings its own unique challenges and demands different machine configurations.

Knowing how to select the right slitting lien or cut to length line for these materials can greatly reduce downtime, improve output quality.

 

 

Material Comparison: Stainless Steel vs. Galvanzied Steel

 

Property	Stainless Steel	Galvanized Steel
Corrosion Resistance	Very High	Medium
Surface Hardness	High (e.g. 304, 316)	Medium
Tensile Strength	High	Lower than stainless
Surface Coating	No coating; homogeneous alloy	Zinc-coated carbon steel
Common Applications	Kitchenware, architecture, medical, precision parts	HVAC, roofing, construction, auto parts

 

 

Processing Challenges Comparison

 

1. Stainless Steel Coil Processing Challenges

• Hardness & Toughness:

Stainless steel is much harder to shear, which wears blades quickly and requires stronger blade shafts and high-precision arbors.

• Surface Sensitivity:

Susceptible to scratches and dents, meaning film laminators or felt tension pads are often necessary to protect the surface.

• Edge Burr & Warping:

Burr formation is a risk if blade celarance or blade sharpness is not properly maintained.

• Heat Generation:

Higher friction during slitting line or shear creates heat buildup, which can cause material distortion if not controlled.

 

 

2. Galvanzied Steel Coil Processing Challenges

• Zinc Layer Peeling:

Improper handling or sharp blade angles can crack the zinc coating, reducing corrosion protection.

• Soft Material Behavior:

Easier to slit and cut, but telescoping or edge curl can occur without proper tension control.

• Coating Dust Buildup:

Zinc particles may accumulate, requiring anti-dust systems or frequent cleaning.

 

 

Machine Selection Tips by Material

 

For Stainless Steel Slitting & CTL Lines

• Machine Frame: Reinforced frame with anti-vibration support, capable of sustaining torque under high tension.
• Tension Pads: Prefer felt tension devices for surface protection
• Film Laminators

For Galvanized Steel Slitting & CTL Lines

• Tension Control: Use servo-controlled tension roll to avoid telescoping or curl

 

Kinbenz's Custom solutions for Both Materials

At Kinbenz, we design and manufacture custom slitting and cut to length lines tailored to your processing material.

• Forged 42CrMo blade shafts 
• Advanced tension pads & film laminators
• Precision control systems with SIEMENS PLC
• High-speed slitting line up to 220m/min
• Own CNC machining workshop and assembly workshop ensure strong structure and trusted quality

 

FQA:

Q: What is the best for stainless steel?

A: One with hardened blades, vibration-resistant arbors, and surface protection features like film lamination or felt pads. Kinbenz offers such lines with full customization

 

Q: What causes burrs when cutting stainless steel?

A: Dull blades, improper blade clearance, or unstable tension control are common causes. Our systems are equipped with precise servo systems to maintain consistent performance