Sheet Metal Shearing Blade

Achieving Perfect Cuts: The Science of High-Quality Sheet Metal Shearing Blades

Introduction

• A dull or poorly made blade not only leaves burrs but can also damage your hydraulic system.

• At Alas Machinery, we make precision-ground blades for high-volume, accurate shearing.

Our Specialization

• We make hydraulic shearing blades, guillotine blades, and shearing machine blades.

• We also offer custom industrial hydraulic shear knives made to your needs.

• Our blades use high-quality materials: 9CrSi, 6CrW2Si, Cr12MoV, H13, H13K, and LD.

• They have a rectangular shape and hardness between HRC50 and HRC62, for clean, precise cuts with no burrs.

• We can make blades from your drawings.

The Importance of Vacuum Heat Treatment

• Creates a uniform internal structure and consistent hardness (HRC 55-62, depending on the material).

• Unlike traditional hardening, it eliminates soft spots and prevents warping.

• Ensures blades stay straight, even for lengths up to 4 meters or more.

Precision Grinding for Burr-Free Results

• Less friction when your guillotine shear runs.

• Lower energy use.

• Longer life for both the blades and your machine.

Common Blade Materials Overview

Alloy Tool Steels

• 9CrSi: High hardness, wear resistance, and good value. Use for thin cold-rolled sheet, galvanized sheet, aluminum, copper, plastic, and leather.

• 6CrW2Si: Contains tungsten for strong heat resistance and wear. Use for hot-shearing materials, light stainless steel, and medium-strength steel.

High-Carbon High-Chromium Steels

• Cr12MoV/SKD-11: Great wear resistance and hardening ability. Use for stainless steel, silicon steel, high-strength steel, low-carbon steel (all thicknesses), Q235, aluminum, and copper.

• Cr12Mo1V1/D2: High strength, wear resistance, and chip resistance. Use for medium-low hardness plates (Q195/Q235/45# steel, 40Cr), aluminum/copper/brass, plastic, rubber, paper, and composites.

Hot-Work Die Steel

• H13 (4Cr5MoSiV1): Strong at high temperatures and resists fatigue. Use for hot-sheared hot-rolled plate, iron plate, medium-heavy plate, scrap metal, hot-sheared strip steel, and thick stainless steel.

Cold-Work Die Steel

• LD (7Cr7Mo2V2Si): High strength, toughness, and wear resistance. Use for high-strength steel, thick plate, stainless steel, and hard-to-shear metals (for large hydraulic and heavy CNC shears).

High-End Alloy Tool Steel

• Powder Metallurgy Steel: Ultra-high hardness and long life. Use for high-end composite plate, wear-resistant steel, and high-precision shearing (for extreme wear resistance needs).

Detailed Material Characteristics

9CrSi Alloy Tool Steel

• Features: High hardness, good wear resistance, balanced performance, good value, widely used

• Hardness: HRC58–60 (after heat treatment)

• Uses: Thin cold-rolled sheet, galvanized sheet, aluminum, copper, plastic, leather

6CrW2Si Alloy Tool Steel

• Features: Has tungsten and silicon; heat-resistant, harder and stronger than 9CrSi; better toughness

• Hardness: HRC60–62 (after heat treatment)

• Uses: Hot-shearing, light stainless steel, medium-strength steel

Cr12MoV / SKD11 High-Carbon High-Chromium Steel

• Features: Great wear resistance and hardening; little distortion after heat treatment; long life

• Hardness: HRC58–60 (after heat treatment)

• Uses: Low-carbon steel (all thicknesses), Q235, aluminum, copper

H13 (4Cr5MoSiV1) Hot-Work Die Steel

• Features: Strong at high temperatures; resists impact and fatigue; stays hard in heat

• Hardness: HRC50–55 (after heat treatment)

• Uses: Hot-sheared strip steel, thick plate, high-strength alloy steel, thick stainless steel

D2 (ASTM Standard)

• Features: Much better wear resistance than regular alloy steel; resists deformation and chipping

• Hardness: HRC58–62 (after heat treatment)

• Uses: Medium-low hardness plates, aluminum/copper/brass, plastic, rubber, paper, composites

LD (7Cr7Mo2V2Si) Cold-Work Die Steel

• Features: High strength and toughness; vanadium and molybdenum make it strong and wear-resistant

• Hardness: HRC58–62 (after heat treatment)

• Uses: High-strength steel, thick plate, stainless steel, hard-to-shear metals (large shears)

Powder Metallurgy Steel (e.g. ASP23, ASP60)

• Features: Made by powder process; ultra-hard (HRC62–65+); long life; stable performance

• Uses: High-precision shearing, jobs needing extreme wear resistance and long life

Quick Guide for Material Selection

• Ordinary carbon steel (Q195, Q235): 9CrSi or Cr12MoV (good value for basic needs)

• Medium-low hardness steel / aluminum & copper (45# steel, 40Cr): SKD11 or D2 (wear-resistant, long life)

• Light stainless steel & medium-strength steel: SKD11 or D2 (balanced performance)

• Thick stainless steel / high-strength steel: H13 or LD (strong and tough)

• Hot-shearing (strip steel, thick plate): H13 or H13K (heat-resistant, resists fatigue)

• High-precision / heavy-duty use: Powder metallurgy steel (ASP23/ASP60) (max precision and life)

Customization and Compatibility

• We make replacement blades for Amada, LVD, Accurpress, and custom machines.

• We offer different hole patterns, T-slots, and edge types (4-edge or 2-edge) to fit your needs.

Our Advantages

• Alas technical support to solve your problems

• Less chipping and breakage

• Smart value for your money

• Engineered for good performance

• Cost-effective

• Lower total cost of ownership (TCO)

• Precision that works for production

Important Notes

• Harder is not always better. Balance hardness and toughness: too hard = chipping; too soft = dulling.

• Heat treatment matters. Good materials need professional quenching and tempering to work well.

• Sticky materials (stainless steel, aluminum, copper): Use Cr12MoV / SKD11 to prevent sticking and chipping.

Conclusion