H13 Alligator Shear Blades | Heavy-Duty Scrap Metal Shearing Knives FAQ
Q1: Why use H13 tool steel for heavy-duty alligator shear blades and scrap metal shearing?
H13 tool steel (DIN 1.2344 / SKD61) is a top-grade hot-work tool steel widely used for heavy-duty alligator shear blades and scrap metal shearing knives. It delivers great toughness, excellent hot hardness, and strong resistance to thermal cracking. When processing large volumes of scrap metal, alligator shears create massive friction and high heat while cutting thick, hard metals. Unlike regular cold-work steel, H13 steel stays stable and keeps its cutting edge sharp even under continuous high-temperature operation. It effectively avoids common blade issues like edge chipping, cracks and sudden breakage, making it the best choice for long-term, heavy-duty scrap metal recycling work.
Q2: What types of scrap metal can H13 alligator shear blades cut?
Our heavy-duty H13 scrap metal shearing blades are built for industrial scrap recycling, and they handle a wide range of heavy metal materials:
Structural steel: I-beams, channel steel and heavy steel profiles
Steel bar materials: Rebars, steel rods and thick steel cables
Non-ferrous metals: Thick copper busbars, large aluminum extrusions and brass castings
Mixed scrap: Car scrap metal, industrial steel pipes and all kinds of mixed industrial metal waste
The actual cutting thickness depends on your alligator shear’s hydraulic power and the blade’s original structural design.
Q3: What is the standard HRC hardness of H13 scrap shearing knives?
All ourH13 metal shearing knives go through precise computer-controlled vacuum heat treatment. The finished blades maintain a consistent hardness of 50 HRC to 55 HRC. This balanced hardness delivers great wear resistance to keep edges sharp for longer runs, while the blade body remains tough enough to handle repeated heavy impacts during daily shearing, preventing deformation and cracking.
Q4: Do you offer custom alligator shear blades based on machine models or technical drawings?
Yes, we do. We provide professional OEM and aftermarket custom alligator shear blade solutions for industrial buyers worldwide. We can produce blades strictly according to your PDF, DWG or DXF technical drawings. If you don’t have drawings, just send us your machine brand and model — we support mainstream models like Lefort, Taurus and Harris. We also accept custom orders based on key dimensions: blade length, width, thickness, bolt hole diameter and hole pitch.
Q5: What dimensional tolerances do your scrap metal shear blades meet?
All our heavy-duty shear blades are processed with high-precision CNC machining and professional surface grinding. We keep straightness, parallelism and thickness tolerances strictly within±0.02 mm (±0.0008 inches). Such tight precision ensures perfect blade alignment and consistent cutting clearance on hydraulic shear jaws. This prevents material jamming, reduces machine load, boosts working efficiency, and delivers cleaner, flatter metal cuts.
Q6: How to extend the service life of H13 alligator shear blades?
Simple daily maintenance can greatly extend the service life of your H13 shearing blades and cut your operational costs. Follow these practical industry tips:
Maintain proper blade clearance: Adjust the gap between upper and lower blades based on the thickness of the scrap you are cutting to avoid tough shearing and fast edge wear.
Rotate blades regularly: Our alligator shear blades feature 2-sided or 4-sided usable edges. Rotate the blades before edges get dull to maximize blade usage.
Secure mounting bolts: Keep all high-tensile bolts fully tightened to prevent tiny blade movement and vibration during operation, which protects edges from damage.
Q7: How do you pack H13 shear blades for international shipping to prevent rust and damage?
Industrial shear blades are heavy and sharp, so we use professional multi-layer export packaging for all overseas shipments to avoid rust and physical damage:
Rust prevention: Every blade is coated with premium industrial anti-rust oil and wrapped with VCI anti-corrosion film to block moisture during long sea and air transit.
Edge protection: Sharp cutting edges are fully covered with high-density foam to avoid metal friction and edge chipping.
Heavy-duty outer packaging: Blades are packed in fumigation-free export plywood crates with reinforced steel bands. The sturdy packaging fits FCL, LCL sea freight and international air shipping, ensuring safe delivery.
Q8: What is the MOQ and lead time for custom H13 shear blades?
Minimum Order Quantity (MOQ): Standard size H13 alligator shear blades are available starting from 1 set (2 pieces). For fully customized non-standard blades that require dedicated steel forging, the MOQ is 2 to 4 pieces.
Production Lead Time: Standard orders take 2 to 4 weeks for production, depending on heat treatment schedules and processing difficulty. We offer fast-track production for urgent replacement orders to reduce your machine downtime.
