Premium Shearing Machine Blades & Guillotine Shear Knives
ALAS high-performance shearing machine blades eliminate burrs, plate tearing and production downtime for metal fabrication workshops.
Made of D2, Cr12MoV, H13 and five other premium tool steels, all blades are processed with vacuum heat treatment to gain uniform hardness ( HRC 50–62) and micrometer precision grinding for high parallelism. Our hydraulic guillotine shear knives cut thin cold-rolled sheets and heavy hot-rolled plates squarely and cleanly, meanwhile protecting machine cylinders from impact damage.
Check our product catalog, or contact our engineers for drawing-based custom blade manufacturing (MOQ: 1 piece).
Industrial Metal Shear Blades: Advanced Metallurgy for Zero Downtime
Shearing efficiency depends largely on blade condition. Worn or misaligned guillotine shear blades will generate heavy burrs, cause material dragging and bring shock load to machine frames, leading to frequent equipment failure and production loss.
ALAS Machinery develops matched blade material formulas and precise gap calibration, to achieve burr-free cutting and prolong your shearing machine service life.
Advanced Metallurgy: Why ALAS Blades Last Longer
Six Premium Tool Steels with Proven Field Performance
9CrSi (HRC 58–60) — Thin Sheets & Non-Ferrous MetalsSuitable for thin steel sheets, galvanized steel, aluminum and copper. Low thermal deformation, cost-effective for daily regular shearing jobs.
6CrW2Si (HRC 54–58) — General-Purpose Conventional SteelCost-effective common blade with good wear resistance and anti-deformation performance. Compatible with standard mechanical and hydraulic shears. It has poor red hardness and toughness, easy to chip under heavy load. Applicable for 0.5–12mm ordinary steel plates. Recommended hardness: 55–57 HRC.
Cr12MoV / SKD11 (HRC 58–60) — Stainless & Silicon Steel Mass CuttingDesigned for mass production. Effectively reduce material galling and adhesion when cutting sticky alloy plates and silicon steel.
D2 (Cr12Mo1V1) (HRC 58–62) — Multi-Material Universal BladeUniversal blade for mixed material cutting. Features reliable wear resistance, stable hardness and durable cutting edge for batch production.
H13 / H13K (4Cr5MoSiV1, HRC 50–55) — Heavy-Duty High-Temp BladeHigh toughness, impact resistance and red hardness for hot shearing and thick plate cutting. Lower room-temperature wear resistance and higher material cost compared with other blade steel.
LD (7Cr7Mo2V2Si) (HRC 58–62) — Ultra-High Strength Alloy BladeHigh-grade blade steel for thick stainless steel and high-hardness structural plates. Combines D2 wear resistance and H13 impact toughness for heavy-duty extreme cutting work.
Quick Blade Material Selection Guide
Ordinary carbon steel (Q195, Q235) → 9CrSi / Cr12MoV | HRC 58–60
Medium-hard steel, aluminum, copper → SKD11 / D2 | HRC 58–62
Light stainless steel, medium-strength steel → SKD11 / D2 | HRC 58–62
Thick stainless steel, high-strength hard plates → LD | HRC 58–62
Thick plates, heavy scrap, high-impact cutting → H13 / 6CrW2Si | HRC 50–55
Hot shearing & high-temperature working scenarios → H13 / H13K | HRC 50–55
Not sure about steel grade selection? Send us your plate thickness and material type, we provide free professional blade selection service.
Note: Keep blade hardness at HRC 50–62 to balance hardness and impact resistance.
Blade Gap Clearance: Core Factor Determining Cutting Quality
Even high-quality blades fail with improper gap clearance. Follow industry standard clearance settings below:
Risks of incorrect clearance
Too tight: Extra friction, blade overheating, edge chipping
Too wide: Plate bending, heavy burrs, uneven cuts, increased machine load
Proper gap calibration ensures square cuts and protects shear machine parts.
Vacuum Heat Treatment & Precision Manufacturing Process
Raw material quality cannot decide final blade performance. ALAS implements complete precision processing procedures:
Vacuum heat treatment: Eliminate internal soft spots, ensure uniform overall blade hardness
Micron precision grinding: Guarantee high parallelism and straight cutting edges
Professional surface finishing: Reduce material adhesion when cutting galvanized steel, titanium and copper alloys
Core Usage Notes & Blade Chipping Causes
Key Operation Guidelines
Balance hardness and toughness: Excessively hard blades chip easily; soft blades turn dull quickly
All D2, SKD11 and custom blades adopt standard vacuum quenching and tempering process
Choose Cr12MoV or SKD11 for sticky alloy cutting to reduce adhesion and burr generation
Custom service available: Custom size, bevel angle and mounting holes per customer technical drawings
Top 5 Causes for Blade Chipping
Over-tight blade gap clearance
Mismatched blade material and cutting workpiece
Long-term running with dull cutting edges
Improper installation, blade misalignment or machine vibration
Cutting plates with hard impurities or uneven thickness
Global Machine Compatibility & After-Sales Support
Our upper and lower shear blades are fully compatible with global mainstream shear machine brands:
Amada, Accurpress, LVD, Cincinnati, Komatsu, Yawei and more.
ALAS Service Highlights: Stocked standard blades, fast delivery, full technical support on blade selection and gap adjustment, to keep your production running normally.
Frequently Asked Questions (FAQ)
Q: What is the best material for shearing blades? Is alloy tool steel recommended?
A: Yes. Alloy tool steel is the optimal choice for industrial shearing work. Common grades: 9CrSi, Cr12MoV/SKD11, D2, H13. Ordinary carbon steel only fits occasional light cutting. Alloy steel delivers stable wear resistance and edge toughness for long-term mass production.
Q: How often to regrind shearing blades?
A: • Intermittent light use: Every 2–4 weeks • Daily regular production: Every 1–2 weeks • Heavy continuous cutting: Every 3–7 days Regrind blades immediately once burrs, plate tearing, abnormal noise or heavy machine load occurs.
Q: What is the standard blade clearance?
A: Adjust based on plate hardness and thickness: • Mild steel: 5%–10% plate thickness • Alloy / high-carbon steel: 8%–12% plate thickness
Q: How to pick matched blades for different cutting jobs?
A: • Thin mild steel: 9CrSi / Cr12MoV (cost-effective daily use) • Medium hard plates: SKD11 / D2 (long service life) • Thick heavy plates: H13 / LD (high impact resistance) Keep blade hardness within HRC 50–62 for balanced performance.
Q: When to replace blades instead of regrinding?
A: Replace blades if regrinding cannot restore clean cutting edges, or the edge suffers excessive wear. Regular gap inspection and proper material selection extend blade service life.
Q: Do you make custom blades for old-model shears?
A: Yes. We offer drawing-based custom shear knives with any size, bevel angle and mounting holes. MOQ: 1 piece.
Q: What is the hardness of ALAS D2 blades?
A: HRC 58–62 after vacuum heat treatment, uniform hardness across the whole blade surface.
Q: Do you offer blade gap adjustment technical support?
A: Yes. Our engineers provide gap calculation tables and remote guidance for on-site blade adjustment.
Want stable cutting and less downtime?
Contact ALAS Machinery for consultation and quotation on standard and custom shearing blades.
