Heavy-Duty Alligator Shear Blades for Scrap Metal Recycling

Alligator Shear Blades & Scrap Metal Shear Knives: Selection Guide

1. Blade Materials for Heavy-Duty Scrap Recycling (ALAS Standard)

1.1 H13 Standard Steel

• Features: Good toughness and heat resistance, not easy to crack or break after long-term repeated cutting

• Applicable Shear: Matches 160T and above hydraulic alligator shears

• Cutting Range: 30mm+ steel plates, hard round steel, alloy steel, thick-wall welded pipes and other heavy metal scraps

• Best For: Daily conventional heavy cutting, suitable for standard scrap metal shear knives and general replacement blades for metal shears

1.2 H13K Upgraded Steel

• Features: Optimized upgraded version of H13 steel. It delivers better high-temperature stability, stronger wear resistance and higher impact resistance than standard H13

• Applicable Shear: Matches 180T and above large heavy-duty crocodile shears

• Cutting Range: 40mm+ extra-thick steel plates, heavy alloy steel, seamless pipes, large structural steel and tough industrial scraps

• Best For: Long-hour non-stop heavy cutting work, the ideal choice for premium hydraulic alligator shear blades and high-load scrap metal shear knives

2. Quick Material Comparison

• H13 Hot Work Steel: Excellent heat resistance and anti-fatigue performance. It is widely used for standard alligator shear blades and common replacement blades for metal shears, perfect for processing hot-rolled plates, thick iron plates and ordinary scrap metal.

3. Vacuum Heat Treatment (Longer Blade Service Life)

3.1 Standard Hardness

• H13 Steel: HRC 52–55

• H13K Steel: HRC 54–58

3.2 Treatment Advantages

• No surface damage, uniform hardness on the whole heavy-duty crocodile shear blades

• 180–220℃ low-temperature tempering removes internal metal stress of replacement blades for metal shears

• Effectively avoid blade bending, cracking and edge chipping for hydraulic alligator shear blades

4. Core Product Advantages

• 4-Way Cutting Edges: All alligator shear blades and scrap metal shear knives are designed with four usable cutting edges. When one edge becomes dull, you can simply rotate the blade for continued use. The service life is 4 times longer than single-edge blades, which effectively reduces blade replacement frequency and equipment downtime.

• Wide Universal Compatibility: Our heavy-duty crocodile shear blades and replacement blades for metal shears fit most mainstream hydraulic scrap shear brands. They can be installed and replaced directly for standard industrial shearing equipment.

5. Simple Blade Selection Tips

• Choose H13 steel alligator shear blades for regular single-type scrap cutting and daily standard shearing work

• Choose H13K steel hydraulic alligator shear blades for complex scrap materials and long-time continuous heavy-duty cutting

6. Common Blade Damages & Maintenance Solutions

• Balance Hardness & Toughness: Excessively hard steel is easy to break under heavy impact. Our alligator shear blades adopt a balanced hardness and toughness design, resisting strong impact and avoiding fracture in harsh cutting environments.

• Rotate Blades On Time: Do not operate shears with dull blade edges. Timely rotation avoids internal micro-cracks caused by excessive cutting pressure on hydraulic alligator shear blades.

• Maintain Correct Blade Clearance: Regularly adjust and calibrate the gap between moving and fixed blades with gaskets. Too wide a gap will cause metal jamming; too narrow a gap will lead to friction, heat damage and edge wear on heavy-duty crocodile shear blades.

7. Conclusion