Metal Shear Blade

The Science of Sharpness: Choosing the Right Metal Shear Blade for Your Shop

• Distorted sheet edges

• Lots of burrs

• Damage to your shearing machine’s hydraulic system

1. Material Selection

Blade Materials & Details

9CrSi Alloy Tool Steel

• Key Traits: Hard, wear-resistant, balanced performance, low cost, most widely used

• Hardness: HRC 58–60 (after heat treatment)

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

6CrW2Si Alloy Tool Steel

• Key Traits: Tungsten/silicon alloy, stays hard at high temps, harder/stronger than 9CrSi, less likely to chip

• Hardness: HRC 60–62 (after heat treatment)

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

Cr12MoV / SKD11 Steel

• Key Traits: Very wear-resistant, easy to harden, little distortion after heat treatment, long life

• Hardness: HRC 58–60 (after heat treatment)

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

H13 Hot Work Die Steel

• Key Traits: Strong at high temps, tough, resists heat fatigue, no softening/deformation

• Hardness: HRC 50–55 (after heat treatment)

• Uses: Hot shearing (strip steel, thick plate), cold shearing (high-strength alloy, thick stainless steel)

D2 (American Standard)

• Key Traits: High carbon/chromium, very wear-resistant, hard to deform, no chipping

• Hardness: HRC 58–62 (after heat treatment)

• Uses: Medium-low hardness plates (Q195/Q235/45# steel, 40Cr), aluminum, copper, brass, non-metallics (plastic, rubber, paper)

LD Cold Work Die Steel

• Key Traits: High strength/toughness, fine grain (vanadium/molybdenum), very wear-resistant, no chipping

• Hardness: HRC 58–62 (after heat treatment)

• Uses: High-strength steel, thick plate, stainless steel, large hydraulic/CNC shears

Powder Metallurgy Steel (ASP23, ASP60)

• Key Traits: Made via powder metallurgy, ultra-hard (HRC 62–65+), very wear-resistant, stable performance

• Uses: High-precision shearing, heavy-duty/high-frequency operations (long life needed)

2. Precision Grinding & Straightness

• Flatness Control: Straightness error ≤ 0.02mm (even for multi-meter blades) via precision grinding

• Optimal Clearance: Proper gap reduces heat, creates smooth cuts, no need for secondary polishing

3. How to Choose the Right Blade

• General carbon steel (Q195, Q235): 9CrSi or Cr12MoV (low cost, reliable)

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

• Light stainless steel, medium-strength steel: SKD11 or D2 (balances wear resistance and anti-chipping)

• Thick stainless steel, high-strength alloys: H13 or LD (tough, no fracture)

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

• High-precision, heavy-duty shearing: Powder metallurgy (ASP23/ASP60) (longest life, best precision)

4. Extend Blade Life: Tips

• Rotate Blades: Most blades have 2–4 cutting edges. Flip them regularly to double their use.

• Adjust Clearance: Change the blade gap based on sheet thickness to avoid chipping.

• Lubricate Blades: Proper lubrication reduces wear by 15% and keeps blades sharp.

Important Notes

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

• Heat treatment matters: Even good materials need professional quenching/tempering to work well.

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

• Replacement blades for top brands (Amada, LVD, Accurpress)

• Custom solutions for all steel cutting needs

• Industrial hydraulic shear knife customization

Our Core Products

• Scrap steel shearing blades

• Hot shearing blades

• Shearing machine blades (we are professional manufacturers)

• Industrial hydraulic shear knives customization

• Hot shearing blades for steel rolling mills

• Replacement blades for mobile hydraulic shears and excavators

ALAS Series Blades

• Materials: 9CrSi, 6CrW2Si, Cr12MoV, H13, H13K, LD

• Design: Rectangular cross-section

• Hardness: HRC50–62

• Performance: High-precision, burr-free cuts

• Customization: Available per your drawings