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H13 Alligator Shear Blades & Scrap Metal Shearing Knives

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Precision Grinding for H13 Alligator Shear Blades

Watch our heavy-duty industrial surface grinder deliver full-length precision grinding for high-grade H13 alligator shear blades.

Based in Nanjing, ALAS INTERNATIONAL CO., LTD focuses on solving the core pain points of the scrap metal recycling industry — catastrophic blade cracking and premature edge deformation caused by long-term high-load continuous pressure. To guarantee stable, uninterrupted operation of your recycling yard, all our scrap shear blades are forged with premium hot-work tool steel that complies with international industry standards, including AISI H13 (USA), DIN 1.2344 (Germany) and JIS SKD61 (Japan).

Core Manufacturing & Technical Advantages

1. Ultra-Precision Parallelism & CNC Grinding

All key mounting surfaces and shearing edges are processed by precision CNC grinding with ultra-tight tolerance control. This processing eliminates micro-shaking during operation and effectively shields the core hydraulic components of shear machines from high-pressure impact and back shock, extending the overall service life of the equipment.

2. Vacuum Heat Treatment for Stable Hardness

We adopt computer-controlled quenching and advanced vacuum heat treatment technology to completely eliminate internal residual stress of the blades. The finished blades achieve a uniform deep structural hardness of HRC 52–56, delivering excellent impact resistance and fatigue resistance for long-duration heavy-duty shearing work.

3. 4-Sided Reusable Design & Lower Operating Costs

Featuring a symmetrical square structure, our shear blades support four-sided reversible use. On-site operators can simply flip the blade to obtain a brand-new cutting edge, quadrupling the blade service life and greatly reducing equipment downtime and tool replacement costs.

Product Compatibility & Specifications

Our factory-direct replacement blades feature a 1:1 plug-and-play fit, suitable for all heavy-duty hydraulic alligator shears with a pressure of 160T and above. Standard sizes are in stock for fast delivery: 600mm, 800mm, 1000mm, 1200mm.

Get Factory Direct Quotation

Email: mt@alasmachinery.com

Phone / WhatsApp: 86-15852949220

FAQ

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 our H13 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.

Product Description

H13 Alligator Shear Blades – Boost Scrap Recycling Productivity

Downtime is the biggest profit killer in scrap metal recycling. Most standard scrap yard shear blades and ordinary industrial scrap metal shearing knives wear out quickly, chip or crack under heavy impact. This disrupts your workflow and lowers overall metal recycling output.

As a professional industrial scrap metal shearing knives manufacturer in China, AlasMachinery supplies heavy-duty, field-tested H13 alligator shear blades. Our heavy duty H13 alligator shear blades for scrap yards deliver stable, long-lasting performance, helping recycling facilities cut replacement costs and reduce machine downtime.

1. H13 Steel Outperforms Regular Shear Blade Steel

Common steel grades like D2 and Cr12MoV work well for light, static cutting tasks. However, these materials are brittle. They cannot withstand irregular impact loads, making them a poor choice as metal recycling shear knives for heavy scrap processing.

H13 hot work steel (4Cr5MoSiV1) is the ideal solution for harsh recycling conditions. Our H13 steel scrap shear blades are professionally formulated and vacuum heat treated H13 steel scrap shear blades for maximum durability in high-volume scrap yards.

Key Performance Benefits of H13 Shear Blades

Strong impact resistance: These durable metal recycling shear knives for steel scrap absorb sudden heavy shocks without chipping, cracking or breaking during thick steel cutting.
Reliable thermal stability: Continuous high-speed shearing generates massive friction heat. H13 steel maintains its hardness and sharpness, avoiding thermal softening during long shifts.
Balanced hardness (56–60 HRC): Offers perfect balance of wear resistance and bending strength, greatly extending the service life of scrap metal shearing knives.
Consistent high-temperature performance: Ensures smooth, stable cutting for non-stop scrap metal recycling production.

H13 Alloy Element Functions

Chromium (Cr): Improves surface hardness, wear resistance and high-temperature durability for heavy scrap shearing.
Molybdenum (Mo): Enhances structural stability and resists thermal fatigue during long-hour continuous operation.
Vanadium (V): Refines internal grain structure, boosting overall toughness and impact resistance for heavy-duty cutting.

2. Scrap Shear Blade Material Selection Guide

Choosing the right metal recycling shear knives directly improves your production efficiency and cost savings. We offer two mainstream materials for different processing needs.

Available Blade Material Options

H13 (4Cr5MoSiV1)

Hardness: 56–60 HRC
Best for: Thick rebar bundles, heavy steel pipes, structural steel and thick steel plates; compatible with 160T+ alligator shears. It is the top choice for heavy duty H13 alligator shear blades for scrap yards.
Core advantage: Exceptional impact toughness, almost no chipping or fracture during heavy steel scrap cutting.

Professional Recommendation: Vacuum heat treated H13 steel scrap shear blades suit most heavy and daily scrap recycling scenarios. For special processing requirements, we provide tailored custom scrap yard shear blades for metal recycling.

3. Precision Heat Treatment & Blade Strengthening

Material quality depends entirely on processing technology. Poor heat treatment can reduce blade lifespan by over 50%. Every batch of our hydraulic crocodile shear blades and H13 alligator shear blades undergoes strict standardized treatment:

Vacuum heat treatment: Eliminates surface oxidation and decarburization, delivering uniform hardness for high-performance vacuum heat treated H13 steel scrap shear blades.
Low-temperature tempering (180–220℃): Releases internal stress to prevent deformation and cracking under repeated hydraulic impact.
Four-side precision grinding: Reversible blade design maximizes the service cycle of all scrap yard shear blades.

Four-Edge Reversible Blade Advantage

All our H13 blades are precision ground on four working edges. When one edge dulls, simply flip the blade to use a new sharp edge. This practical design multiplies blade service life, reduces cutting burrs, protects your hydraulic shear system, and lowers your overall cost of replacement hydraulic crocodile shear blades.

4. Full Size Compatibility & Custom Service

Standard in-stock sizes: 400mm, 600mm, 800mm, 1000mm, 1200mm hydraulic crocodile shear blades for quick delivery.
Universal compatibility: Fits all mainstream global alligator and crocodile shear machines, meeting and exceeding OEM specifications.
Custom OEM/ODM support: We manufacture custom scrap yard shear blades for metal recycling according to your CAD drawings, bolt hole pitches and dimensional requirements with precise CNC machining for perfect fitting.

5. Why Choose Our H13 Scrap Shear Blades

Minimize machine downtime and frequent replacement hydraulic crocodile shear blades purchases
Cut long-term maintenance and sharpening costs for all industrial scrap metal shearing knives
Maintain stable high-output performance for large-scale metal recycling
Lower cost per ton with durable metal recycling shear knives for steel scrap

Get Factory Direct Price & Support

Source high-quality H13 alligator shear blades and heavy-duty scrap metal shearing knives directly from the factory. Contact us to check replacement hydraulic crocodile shear blades price and get a transparent wholesale quotation based on your machine model or blade drawings.

Alligator shear blade Dimensions

NO.	Product Name	Specification Dimensions (length x width x height/thickness) ）	Material	Remarks
18	Alligator Shear Blade size Scrap metal shearing blades size	6008030mm	H13,H13K	Customization services are available; we can manufacture according to your drawings, with a minimum order quantity of 1 piece.
19		60010030mm
20		80012040mm
21		80012050
22		100012040
23		100012050
24		120012040
25		120012050

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)
4Cr5MoSiVI	H13	SKD61	X40CrMoV5-1	1.2344	X40CrMoV5	4X5MO1C	BH13

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