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alligator shear blades for scrap metal recycling

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Alligator Shear Blades Manufacturer

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Nanjing, China
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Alligator Shear Blades & Scrap Metal Recycling Knives: Selection & Manufacturer Guide

In the tough scrap recycling industry, your alligator shear blades—also called scrap metal recycling knives—are key to your work. Whether you cut rebar, copper tubes, or heavy steel, these blades (a key type of hydraulic shear replacement parts) affect how much you produce each day and how much you spend on upkeep. To get the most out of your investment, choose a reliable manufacturer that makes these blades, scrap metal recycling knives, and hydraulic shear replacement parts.

The ALAS Advantage: Better Materials and Heat Treatment for Top Scrap Metal Recycling Knives

At ALAS Machinery, we don’t just make blades. We build high-quality tools, including alligator shear blades, scrap metal recycling knives, and hydraulic shear replacement parts. For scrap processing equipment, we focus on three high-quality alloys that work well in harsh conditions:

H13 Tool Steel:

It is very tough and resists heat well. It can handle thousands of cuts without breaking—perfect for making durable scrap metal recycling knives and hydraulic shear replacement parts. Use it for alligator shears of ≥160T. It cuts ultra-thick steel plates (≥30mm), hard round steel, regular alloy steel, thick-walled welded pipes, and other heavy materials.

H13K Modified H13 Hot Work Tool Steel:

It is an upgraded version of H13. It keeps H13’s great impact resistance but is tougher, more stable at high temperatures, and resists wear better. It works better than regular H13. It is a top choice for scrap metal recycling knives and hydraulic shear replacement parts. Use it for ultra-large alligator shears of ≥180T. It cuts extra-thick steel plates (≥40mm), heavy alloy steel, thick-walled seamless pipes, large structural steel, and other high-pressure, high-impact materials. It also handles heavy, non-stop cutting in scrap yards.

LD Steel (7Cr7Mo2V2Si) Cold Work Tool Steel:

After heat treatment, it has a hardness of HRC60-64. It resists wear much better than regular tool steel. It is tough and has even hardness. It is great for scrap metal recycling knives and hydraulic shear replacement parts. Use it for medium-to-large alligator shears of 100T-160T. It cuts 10-30mm steel plates, thick rebar, rusty scrap steel, angle steel/channel steel, and other abrasive materials.

Common Material Overview of Alligator Shear Blades

The following table summarizes the type, core characteristics and main applicable shearing materials of common blade materials:

Blade Material	Material Type	Characteristics	Main Shearing Materials
H13 (4Cr5MoSiV1)	Hot Work Die Steel	Excellent high temperature strength and thermal fatigue resistance	Hot-sheared hot rolled plate, iron plate, medium and thick plate, scrap metal, hot-sheared strip steel, cold-sheared high strength alloy steel, stainless steel thick plate
LD (7Cr7Mo2V2Si)	Cold Work Die Steel	High strength, good toughness, wear resistance and chipping resistance, excellent comprehensive performance	High strength steel, stainless steel, thick plate and hard-to-shear metal materials (for large hydraulic shearing machines, heavy CNC shearing machines)

Vacuum Heat Treatment: The Key to Long-Lasting Scrap Metal Recycling Knives

The secret to long-lasting blades—whether alligator shear blades or scrap metal recycling knives—is the heat treatment. As a specialized manufacturer, we use advanced vacuum quenching for our blades and hydraulic shear replacement parts. This ensures even hardness: HRC 52-55 for H13, HRC 54-58 for H13K, and HRC 60-64 for LD. This balance keeps blades wear-resistant and impact-resistant, which is vital for scrap yards.

Basic Heat Treatment Process for Top Scrap Metal Recycling Knives

H13, H13K, and LD materials need precise heat treatment to work well. These materials are used to make alligator shear blades, scrap metal recycling knives, and hydraulic shear replacement parts. Poor processing can cut blade life by half or more. Our standard heat treatment steps are:

We use vacuum heat treatment instead of regular air quenching. This reduces surface damage to blades. It ensures even hardness for all our scrap metal recycling knives and hydraulic shear replacement parts—no matter if they use H13, H13K, or LD.

Right after quenching, we temper blades at 180-220℃. This removes internal stress. It prevents blades from bending or breaking. It also keeps H13, H13K, and LD materials tough and hard—so our alligator shear blades and hydraulic shear replacement parts work well every time.

Four-Way Cutting Edges: Get More Value from Scrap Metal Recycling Knives

Our alligator shear blades and scrap metal recycling knives are designed to save you time and money. Most of these key hydraulic shear replacement parts have four usable cutting edges. When one edge gets dull, just rotate the blade to a new one. This makes the blade last four times longer than single-edge blades. It cuts down on how often you need to replace hydraulic shear replacement parts and lowers your costs.

Custom Fit for All Major Brands: Hydraulic Shear Replacement Parts That Work Perfectly

We offer replacement blades—including alligator shear blades and scrap metal recycling knives—as part of our full line of hydraulic shear replacement parts. They work with major global brands like Geka and Piranha, as well as many hydraulic scrap shears.

Suggestions on blade material selection

Crocodile shear blades and scrap shear blades are typically made of H13 material. For complex scrap compositions, H13K is recommended. For even higher requirements, please contact the manufacturer to discuss upgrading the material.

Blade Metal Materials International Grade Corresponding Table

China (GB)	USA(ASTM)	Japan (JIS)	Germany (DIN)	Germany (W-Nr)	France (NF)	Russia (ROCT)	U.K (BS)
Cr12Mo1V1	D2	-	X155Cr12Mo12	1.2379	X160CrMoV12	-	BD
4Cr5MoSiVI	H13	SKD61	X40CrMoV5-1	1.2344	X40CrMoV5	4X5MO1C	BH13
LD	-	-	-	-	-	-	-

Mechanical blades are (special wearing parts) due to different cutting products, correct and reasonable selection of materials, heat treatment hardness, grinding accuracy, packaging requirements. Please contact us before purchase and confirm whether the blade specifications materials you need are available goods.