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H13 tool steel replacement blades for alligator metal shear

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H13 Alligator Shear Blades

Port:
Nanjing, China
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T/T, Money Gram

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Common Material Overview of Alligator Shear Blades & Why H13 is the Ultimate Material

1. H13 (4Cr5MoSiV1) Blade Material

1.1 Core Information

Material type: Hot Work Die Steel; Alloy elements: Chromium (Cr) enhances hardness, wear and high-temperature resistance; Molybdenum (Mo) boosts high-temperature strength and thermal fatigue resistance; Vanadium (V) refines structure, increases hardness, toughness and impact resistance.

Performance: HRC50-55 after heat treatment; good impact resistance, high-temperature stability, core toughness and hardenability.

Suitable for: ≥160T alligator shears; cutting ultra-thick steel plates, high-hardness round steel, alloy steel, thick-walled welded pipes, hot-rolled plate, iron plate and scrap metal.

Advantages: Ideal for heavy-impact work; prevents chipping/breakage; versatile and easy to process.

2. Blade Strengthening Process

2.1 Key Importance

To maximize H13 blade performance and service life, precise heat treatment is essential — poor processing can cut blade life by more than 2 times.

2.2 Basic Heat Treatment Steps

Vacuum heat treatment (instead of ordinary air quenching): Reduces surface oxidation and decarburization; ensures uniform overall hardness.
Low-temperature tempering (180-220℃): Eliminates internal stress; prevents deformation and cracking; stabilizes core hardness and toughness.

To maximize H13 blade performance and service life, precise heat treatment is essential — poor processing can cut blade life by more than 2 times.

3. Blade Material Selection Suggestions

3.1 Practical Recommendations

Based on H13’s performance and strengthening process above, here are practical selection suggestions for alligator shear blades:

Alligator shear blades are usually made of H13, which is suitable for most common and heavy-duty shearing scenarios.

For complex scrap or higher requirements, contact the manufacturer to discuss material upgrades.

4. Why H13 is the Ultimate Material for High-Volume Alligator Shearing

4.1 Core Advantage Overview

Based on H13’s material properties and strengthening process, it becomes the most reliable choice for high-volume alligator shearing — its unique alloy composition and heat treatment ensure stable performance in harsh working conditions.

In scrap metal recycling, alligator shear blade performance determines daily output. H13 (AISI H13/DIN 1.2344) tool steel is the most resilient solution, thanks to its unique alloy composition and properties.

4.2 Thermal Advantage

Alligator shears generate heat during long-hour operation; standard steel softens and dulls quickly, but H13’s Cr and Mo elements ensure high "red hardness" to maintain cutting performance all shift.

4.3 Impact Resistance

Scrap metal density varies, causing unpredictable impacts; H13’s Cr-Mo-V alloy structure ensures high fracture toughness, preventing chipping or snapping when cutting heavy steel sections.

4.4 Heat Treatment for Longevity

Blade life relies on core strength; vacuum quenching + triple tempering achieves HRC52-56 hardness, balancing cutting sharpness and ductility to withstand high hydraulic pressure.

4.5 Four-Edge Design Advantage

H13 blades are precision-ground on four sides; flipping dull edges quadruples service life, reduces burrs and protects the hydraulic motor, maximizing ROI.

Conclusion

For recycling centers that can’t afford mid-day blade changes, H13 alligator shear blades offer the best heat resistance and durability. Investing in H13 means fewer sharpenings, less downtime, and lower cost-per-ton.

Based on H13’s material properties and strengthening process, it becomes the most reliable choice for high-volume alligator shearing — its unique alloy composition and heat treatment ensure stable performance in harsh working conditions.

In scrap metal recycling, alligator shear blade performance determines daily output. H13 (AISI H13/DIN 1.2344) tool steel is the most resilient solution, thanks to its unique alloy composition and properties.

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