What Are Slitter Knives?
Slitter knives (also called slitter blades) are key precision cutting tools for metal coil slitting lines. They are made from high-quality materials like alloy tool steel, high-speed steel, or cemented carbide. Their job is to cut wide metal coils into narrow, custom-width strips with clean, smooth edges.
What Are Their Main Uses?
Slitter knives are essential for cutting wide metal coils into narrow strips. They are used in many industries that process metal coils. Key uses include:
Cut steel, stainless steel, aluminum, copper, and other metal coils into custom narrow strips
Create flat, smooth cut edges (no extra processing needed)
Work with fast, continuous slitting production lines
Keep strip width consistent for later manufacturing steps
Common industries using slitter knives:
Metallurgy
Metal fabrication
Automotive parts
Home appliances
Hardware
Special alloy processing
Recommended Slitter Knives by Metal Type
Choose the right blade for your metal strip to get the best performance, longest life, and highest quality cuts. Below are our top recommendations:
1. Ordinary Carbon Steel Strip (Cold-Rolled/Hot-Rolled)
Blade material: Cr12MoV or SKD-11
Blade type: Standard round blades or paired blades
Hardness: HRC 58–60
Benefits: Tough, wear-resistant, long-lasting; great for high-volume, daily slitting
2. Stainless Steel Strip (304, 316, 430)
Blade material: Cr12MoV1 or D2
Blade type: Round blades or paired blades
Hardness: HRC 60–62
Benefits: Very wear-resistant, less likely to chip; creates smooth, burr-free cuts
3. Soft Non-Ferrous Metals (Aluminum, Copper, Brass)
Blade material: High-speed steel (HSS) or alloy tool steel
Blade type: Precision-ground round blades
Benefits: Smooth cut surface; reduces material sticking to the blade and surface scratches
4. Galvanized and Color-Coated Strips
Blade material: Cr12MoV
Blade type: Mirror-polished round blades
Hardness: HRC 58–60
Surface treatment: Nitrided or mirror-polished
Benefits: Protects the strip’s coating; avoids zinc loss and paint scratches during slitting
Why ALAS Engineering-Grade Blades Are Better Than Generic Imports
1. Better Precision
ALAS slitter knives are engineered, not just basic products
We use in-house precision CNC machining and HardnessMap quality control
Strict control over flatness and size ensures less edge chipping, scratching, and downtime
2. Lower Total Cost (TCO)
Our blades use special metallurgy designed for your specific metal
They last longer and can process more tons per sharpening
Fewer blade changes and less grinding mean lower overall costs
3. Expert Engineering Support
You get more than a blade—you get a complete slitting solution
Our team provides custom settings and guidance for your machine, material, and speed
This ensures your line runs efficiently, with less waste and better yield
Blade Metal Materials International Grade Corresponding Table
China (GB) | USA(ASTM) | Japan (JIS) | Germany (DIN) | Germany (W-Nr) | France (NF) | Russia (ROCT) | U.K (BS) |
Cr12MOV | - | SKD11 | X165CrMov12 | 1.2601 | - | X12M | - |
Cr12Mo1V1 | D2 | - | X155Cr12Mo12 | 1.2379 | X160CrMoV12 | - | BD |
4Cr5MoSiVI | H13 | SKD61 | X40CrMoV5-1 | 1.2344 | X40CrMoV5 | 4X5MO1C | BH13 |
LD | - | - | - | - | - | - | - |
W18Cr4V | T1 | SKH2 | S18-0-1 | 1.3355 | HS18-0-1 | P18 | BT1 |
W6Mo5Cr4V2 | M2 | SKH9 | S6-5-2 | 1.3343 | - | P6M5 | BM2 |
|
|
|
|
|
|
|
|
Why Choose Our Slitter Knives?
Source Manufacturer
Own production workshop, complete CNC machining equipment, support for customized orders, and controllable delivery time;
Quality Assurance
Full-process quality inspection, from material selection to finished products, ensuring blade accuracy and wear resistance;
Full Specification Compatibility
Covering round, irregular, upper/lower blades, compatible with all models of slitting machines, meeting the processing needs of different industries;
After-Sales Support
Providing one-stop service including blade selection, installation guidance, and precision grinding and repair, solving processing problems.
Stainless Steel Slitter Knives
Steel Strip Slitter Knives