Mobile Hydraulic Shear Blades for Excavators
Hydraulic Shear Blade Types & Applications
Eagle shear replacement blades
Hydraulic scrap shear knives
Demolition shear blades for excavators
Replacement cutting tools for mobile shears
Double-cylinder scissors blades
Hydraulic scissors blades for excavators
Eagle's beak scissors blades (for used car cutting & removal)
Core Shear Blade Components
Upper Primary Blade
Upper Secondary Blade
Piercing Tips Blade
Guide Blade
Cross Blade
Lower Secondary Blade
Lower Primary Blade
ALAS blades are typically made from materials such as 9CrSi, 6CrW2Si, Cr12MoV, H13, H13K, and LD. The blades have a rectangular cross-section and a hardness of HRC50 to 62. They provide high-precision, burr-free cutting surfaces. Customization according to drawings is available.
Common Material Overview of Scrap 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) |
Detailed Characteristics of Various Blade Materials
H13 (4Cr5MoSiV1) Hot Work Tool Steel
Performance: Hardness of HRC52-55 after quenching and tempering, outstanding resistance to impact loads, excellent high-temperature softening resistance, excellent core toughness, and good hardenability;
Suitable for alligator shears with a tonnage of ≥160T, primarily for shearing ultra-thick steel plates (≥30mm), high-hardness round steel, ordinary alloy steel materials, thick-walled welded pipes, and other heavy materials.
Advantages: A general choice for heavy-duty impact conditions, effectively resisting strong impacts during shearing, preventing blade chipping and breakage, strong adaptability, and mature process.
H13K Modified H13 Hot Work Tool Steel
Performance: An upgraded and modified version of H13, retaining the excellent impact resistance of H13 while improving core toughness, high-temperature stability, and fatigue resistance. Hardenability is superior to conventional H13;
Suitable for ≥180T ultra-large tonnage alligator shears, primarily for shearing extra-thick steel plates (≥40mm), heavy alloy steel materials, thick-walled seamless pipes, large structural steel, and other ultra-high pressure and high-impact materials, as well as ultra-heavy continuous shearing operations in scrap metal yards;
Advantages: More resistant to strong impact and fatigue than conventional H13, with a 20%-30% longer service life than H13 under ultra-heavy working conditions, making it the preferred material for ultra-large alligator shears.
LD Steel (7Cr7Mo2V2Si) Cold Work Tool Steel
Performance: Hardness of HRC60-64 after quenching and tempering, surface wear resistance far superior to conventional tool steel, high core toughness, good overall hardness uniformity of the blade, and outstanding resistance to abrasive wear;
Suitable for 100T-160T medium-to-large tonnage alligator shears, primarily for shearing 10-30mm thick steel plates, thick rebar, rusty scrap steel, angle steel/channel steel, and other highly abrasive conventional materials.
Advantages: The best wear resistance among the four materials, significantly reducing the frequency of blade replacement and improving the efficiency of large-scale production.
Strengthening Process
The performance of the four materials depends on precise heat treatment and surface strengthening. Differences in processing can lead to more than a 2-fold difference in blade service life for the same material.
Basic Heat Treatment Process
1. Vacuum heat treatment is used instead of ordinary air quenching to reduce surface oxidation and decarburization of the blade, ensuring overall hardness uniformity;
2. Low-temperature tempering at 180-220℃ is performed immediately after quenching to eliminate internal stress, prevent blade deformation and cracking, and stabilize the core hardness and toughness of the material.
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.
Our quality: All mechanical parts, tools, and molds are manufactured in-house. Upon arrival at our warehouse, products undergo rigorous inspection by a dedicated quality control department. The following is our production process:
1. Blanking-choose materials according to customer requirements.
2. Forging-Forging is mainly to increase the density of the material.
3 .Annealing-to lower the temperature for processing.
4 .Finishing ---- mainly processing materials.
5 .Inspection ---- Inspect whether the product is consistent with the drawing sample.
6.Quenching ---- Improve the hardness of molded products and materials.
7 .Annealing-In order to increase the wear resistance of the product, it must be annealed for a long time to prevent the blade from breaking
8 .Tempering-mainly the parallelism of the tempering products for processing.
9 .Rough grinding ---- rough grinding the surface of the product.
10.Precision grinding ---- Super-precision grinding and mirror grinding to improve the accuracy and parallelism of the product.
11. Inspection-Let unqualified products refuse to flow into the market.
12 .Packing ---- Pack differently according to different products.