Galvalume Steel Coil Slitting

1. Core Features & Advantages

• 55% Al + 43.5% Zn + 1.5% Si alloy coating for 2-6x stronger corrosion resistance than galvanized steel.
• Withstands temperatures up to 300℃; ideal for high-heat working conditions.
• Excellent formability: no coating peeling or cracking during bending, stamping & shearing.
• Sleek silver-grey metallic finish; perfect base for PPGL color coating with superior adhesion.
• Cost-effective alternative to aluminum & stainless steel with longer service life.

2. Slitting Production Process

• Strict incoming inspection: thickness, coating weight & surface quality verification.
• Precision slitting with ±0.1mm width tolerance via adjustable circular knives.
• Edge deburring & flattening to ensure burr-free, straight & smooth strips.
• Customized coil winding (by length/weight) & seaworthy packaging for safe delivery.

3. Key Applications

• Building Hardware: Light steel keels, door/window frames, guardrail brackets.
• Home Appliances: Shells & inner supports of refrigerators, air conditioners & washing machines.
• Auto Parts: Door frames, trunk brackets & chassis components.
• Solar PV Mounts: 20+ years of outdoor service life in coastal/humid areas.
• Warehouse Racks: Load-bearing beams & columns for light/medium duty storage systems.

4. Selling Points

• Tailor-made slitting sizes to meet diverse industry requirements.
• Special edge treatment to prevent rusting after slitting; full-body corrosion protection.
• Burr-free, flat strips ready for secondary processing (bending, welding, stamping).
• Unbeatable cost-performance ratio vs. stainless steel & aluminum sheets.
• Versatile for both indoor & outdoor applications (coastal, high-temperature & industrial sites).

• Galvalume Slitting Quotation Template (By Application Scenarios)

  1. Application Scenario: Solar PV Mounts (Optimal Parameter Combination)

  Parameter Category	Specific Items	Optimal Parameters	Standard/Remark
  Basic Dimension	Thickness	0.8-1.2mm	Adapt to outdoor load-bearing requirements
  	Slitting Width	80mm/100mm/120mm	Customizable by bracket design
  	Width Tolerance	±0.08-±0.1mm (Precision Grade)	Ensure welding accuracy
  	Coil Inner Diameter	508mm/610mm	Universal for PV mount production lines
  Coating Parameter	Coating Type	AZ (55% Al + 43.4% Zn + 1.6% Si)	Hot-dip aluminum-zinc coating
  	Coating Weight	AZ100-AZ150 (50-75g/m² per side)	25+ years outdoor service life, salt spray test ≥1000h
  Mechanical Property	Base Material Grade	S350GD+AZ/S550GD+AZ	Q/BQB 425 Standard
  	Yield Strength	≥350MPa (S350GD+AZ)/≥550MPa (S550GD+AZ)	Resist wind load and deformation
  	Elongation	≥16%	GB/T 228.1 Standard
  Slitting Precision	Edge Treatment	Deburring + Passivation	Prevent edge rusting
  	Flatness	≤1.5mm/m	Ensure bracket assembly accuracy
  Packaging	Packaging Method	Moisture-proof paper + Film wrapping + Steel strapping + Wooden pallet	Seaworthy for export

  2. Application Scenario: Home Appliance (Refrigerator Back Panel/Air Conditioner Shell)

  Parameter Category	Specific Items	Optimal Parameters	Standard/Remark
  Basic Dimension	Thickness	0.25-0.6mm (Ultra-thin)	Reduce overall appliance weight
  	Slitting Width	600mm/800mm/1000mm	Adapt to appliance mold size
  	Width Tolerance	±0.1mm	Ensure stamping precision
  	Coil Inner Diameter	508mm	Fit home appliance stamping lines
  Coating Parameter	Coating Type	AZ (55% Al + 43.4% Zn + 1.6% Si)	Hot-dip aluminum-zinc coating
  	Coating Weight	AZ50-AZ80 (25-40g/m² per side)	Meet indoor/outdoor anti-rust requirements
  Mechanical Property	Base Material Grade	DX51D+AZ/DX52D+AZ	Q/BQB 425 Standard, suitable for cold forming
  	Yield Strength	250-340MPa	Good stamping formability
  	Elongation	≥22%	Avoid cracking during deep drawing
  Slitting Precision	Edge Treatment	Deburring + Flattening	Prevent scratching during assembly
  	Surface Finish	Minimized Spangle + Chromium-free Fingerprint Resistant	Eco-friendly, RoHS Certified
  Packaging	Packaging Method	Film wrapping + VCI paper + Wooden pallet	Prevent surface scratch and rust

  3. Application Scenario: Construction (Light Steel Keel/Building Envelope)

  Parameter Category	Specific Items	Optimal Parameters	Standard/Remark
  Basic Dimension	Thickness	0.6-2.0mm	0.6-0.8mm for keel; 1.0-2.0mm for envelope
  	Slitting Width	50mm/75mm/100mm/120mm	Customizable by construction design
  	Width Tolerance	±0.1-±0.15mm	Meet cold bending forming requirements
  	Coil Inner Diameter	610mm	Universal for construction steel processing lines
  Coating Parameter	Coating Type	AZ (55% Al + 43.4% Zn + 1.6% Si)	Hot-dip aluminum-zinc coating
  	Coating Weight	AZ100-AZ150 (50-75g/m² per side)	20+ years service life in coastal/humid areas
  Mechanical Property	Base Material Grade	S250GD+AZ/S350GD+AZ	Q/BQB 425 Standard, structural grade
  	Yield Strength	≥250MPa (S250GD+AZ)/≥350MPa (S350GD+AZ)	Bear construction load
  	Elongation	≥16%	GB/T 228.1 Standard, good cold bending performance
  Slitting Precision	Edge Treatment	Deburring + Rounded Edge (Optional)	Safe for on-site construction
  	Surface Finish	Regular Spangle/Chromium-free Passivation	Adapt to outdoor weather conditions
  Packaging	Packaging Method	Moisture-proof paper + Steel strapping + Wooden pallet	Seaworthy, suitable for long-distance transportation