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High-precision custom sheet metal shear blades made of premium D2 tool steel

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Custom Industrial Metal Shear Blades & Sheet Metal Shear Knives

High-grade sheet metal shear blades deliver precise cutting performance for metal processing work.
Made from premium tool steel including Cr12MoV, D2 and H13, every blade gets professional vacuum heat treatment to gain steady hardness and strong shock resistance.
Compatible with hydraulic, mechanical and guillotine shearing equipment. It cuts carbon steel, stainless steel and aluminum neatly with no rough edges. Durable structure cuts maintenance frequency and prolongs working lifespan.

Port:
Nanjing, China
Payment Terms:
T/T, Money Gram

Availability:

Quantity:



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Precision Grinding Process of Premium Metal Shear Blades | Industrial Knife Manufacturing

See how we pursue ultimate precision. This video displays the precise sharpening and surface grinding work of our heavy-duty metal shear blades.

Every sheet metal shear blade goes through strict CNC grinding with steady liquid cooling. This processing avoids tiny heat cracks, delivering smooth cuts without burrs and longer service life. We craft aftermarket shear knives from top-grade D2 and H13 tool steel, fitting most mainstream metal cutting equipment models

Sheet Metal Shear Blades FAQ

Q: What are sheet metal shear blades?

A: Heat treated steel cutting parts mounted on shearing equipment, used to cut metal sheets by shear force.

Q: What materials are used for metal shear blades?

A: Common blade materials are 9CrSi, 6CrW2Si, Cr12MoV, D2, H13 and carbide steel.

Q: How do I choose the right shear steel knife for my cutting needs?

A: Pick blades based on material hardness, cutting thickness, workload and machine type. Select 9CrSi for mild steel below 6mm. Cr12MoV and D2 work well for 1mm to 4mm stainless steel. H13 fits plates thicker than 10mm. Match blade shape and performance to actual cutting requirements.

Q: What is blade clearance in metal shearing?

A: It refers to the gap between upper and lower blades. Standard gap ranges 5% to 10% of sheet thickness, 8% to 10% for stainless steel cutting.

Q: What problems come with improper blade clearance?

A: Narrow gap easily chips blade edges and creates high heat. Excess gap causes rough burrs and uneven cutting surfaces.

Q: What leads to burrs on cut metal edges?

A: Dull edges, incorrect gap distance, displaced blades and worn blade bodies are the main causes.

Q: How to maintain shear blades daily?

A: Inspect and lubricate blades every day. Check and adjust blade position weekly. Carry out full inspection and edge grinding every month. Keep blades dry in storage and avoid edge collision.

Q: When to sharpen or replace shear blades?

A: Sharpen blades that turn blunt. Replace blades with cracks, broken edges and severe wear.

Q: Can one blade cut different metal types?

A: Not recommended. Long term mixed use accelerates wear and ruins cutting effect.

Q: What factors cause blade cracks and edge damage?

A: Wrong blade material, improper gap adjustment, insufficient lubrication, irregular material cutting and poor heat treatment all damage blades.

Q: What is the average service life of shear blades?

A: Blades last 2 to 6 months for common steel cutting, 1 to 3 months for stainless steel. Regular maintenance helps prolong service time.

Q: When to purchase custom shear blades?

A: Custom blades are needed for special sizes, high strength metal cutting, mass production and four-edge usable designs.

Q: What safety notes for blade handling?

A: Wear gloves and safety glasses during operation. Hold blade sides only, do not touch sharp edges. Power off and lock equipment before installing or removing blades.

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

Introduction

In metal fabrication, the first cut determines the quality of your final product. Sheet metal shearing blades (also called guillotine knives) are the most important parts of any shearing machine.

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

Every blade we make goes through a special vacuum heat treatment process. This process offers key benefits:

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

To get clean, square cuts, blade clearance and edge shape must be exact. Our blades are ground to a precision of ±0.02mm. This accuracy means:

Less friction when your guillotine shear runs.
Lower energy use.
Longer life for both the blades and your machine.

Common Blade Materials Overview

Different blade materials work for different jobs. Below are the most common types and their uses:

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

Choose the right material based on what you’re cutting:

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

Don’t settle for poor cutting quality. Choose industrial-grade blades from Alas Machinery—made with good materials and precision engineering. Contact our technical team today for a custom quote.

Metal shear blade technical specifications

NO.	Product Name	Specification Dimensions (length x width x height/thickness) ）	Material	Remarks
1	metal shear blade size shearing machine blade size	508x70X22	55CrSi， 9crsi，6crw2si ，cr12mov， H13	Customization services are available; we can manufacture according to your drawings, with a minimum order quantity of 1 piece.
2		508x80x25
3		1025x63x16
4		1025x80x20
5		1025x100x25mm
6		1100x64x16mm
7		1100x80x20mm
8		1100x100x25
9		1300x63x16
10		1300x63x18
11		1300x80x20
12		1300x80x25
13		2030x80x25mm
14		3200x100x30mm
15	Manual sheet metal shear blades szie	1703010
16		2053010
17		3503010

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)
9CrSi	-	-	90CrSi5	1.2108	-	9XC	-
6CrW2Si	-	-	60WCrV7	1.255	55WC20	6XB2C	-
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
45	1450	S45C	C45E	1.1191	C45E	45	C40E
42CrMo	4140	SCM44O	42CrMo4	1.7225	42CD4	-	708M40