Phone:
86-15852949220
NANJING ALAS INTERNATIONAL CO., LTD
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Nanjing, China
T/T, Money Gram
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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.
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) |
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.
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.
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.
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.
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.
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.
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) |
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.
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.
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.
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.
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.