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M42 Cobalt HSS Slotter Cutting Blade with HRC 66-68 Hardness and Red Hardness Up to 600 °C for Corrugated Carton Slotter Machines

M42 Cobalt HSS Slotter Cutting Blade with HRC 66-68 Hardness and Red Hardness Up to 600 °C for Corrugated Carton Slotter Machines

MOQ: 1 piece / 1 pair / 1 set
Price: Negotiation
Standard Packaging: Carton boxes, wooden cases
Delivery Period: Within 25 days
Payment Method: L/C, D/A, D/P, T/T, Western Union
Supply Capacity: 1 piece will take 15 days
Detail Information
Place of Origin
Shanghai, China
Brand Name
ZHIJING
Certification
ISO9001
Model Number
ZJ-M42-SB03
Material:
M42 Cobalt HSS (W2Mo9Cr4VCo8)
Cobalt Content:
Approximately 8%
Hardness:
HRC 66-68
Red Hardness:
Up To 600 °C
Precision:
Within 0.02 Mm
Surface Finish:
Ra 0.4 µm
Blade Thickness:
3-10 Mm, Customized
Blade Size:
Customized Per Drawing
Applicable Board:
Double Wall BC/EB Flute, 7-ply
Advantage:
Hot Hardness, Long Regrind Intervals
OEM & ODM:
Accepted
Warranty:
6 Months
Highlight:

M42 Cobalt HSS Slotter Blade

,

HRC 66-68 Slotter Cutting Blade

,

Red Hardness 600 °C Slotting Blade

Product Description

The ZHIJING M42 Cobalt HSS Slotter Cutting Blade is a premium replacement part built for corrugated carton slotter machines that run double wall board at high speed. M42, also known as W2Mo9Cr4VCo8, is a cobalt high speed steel containing roughly eight percent cobalt, which dramatically improves red hardness, the ability of the steel to keep its cutting edge when friction raises the temperature at the cutting zone. Where ordinary blades soften and wear quickly once the edge heats up, this cobalt alloy steel maintains hardness at elevated temperatures, so slotting stations keep producing clean cuts during long runs of heavy BC and EB flute board, thick 7-ply sheets, and board with abrasive recycled content.

Every M42 blade is hardened through a carefully controlled austenitizing and triple tempering cycle to reach HRC 66-68, then precision ground to tight tolerances. The combination of extreme room-temperature hardness and retained hot hardness means the blade resists abrasive wear and edge deformation at the same time, giving converters noticeably longer intervals between regrinds on demanding applications. When the edge finally needs attention, standard grinding practices restore the blade, and the cobalt steel body can be reground many times over its working life, which makes the higher initial material cost a sound investment for high-throughput plants.

Key Features
  • Eight Percent Cobalt High Speed Steel: M42 alloy composition delivers the highest hardness available in conventional high speed steels together with superior toughness.
  • Excellent Red Hardness: The cutting edge keeps its hardness at elevated temperatures, preventing softening and rapid wear during continuous high-speed slotting.
  • HRC 66-68 Working Hardness: A triple tempered microstructure supports a very hard, wear-resistant edge that still resists chipping on well-set machines.
  • Precision Ground Geometry: Flatness, parallelism and edge straightness are held within 0.02 mm for consistent slot depth across the full working width.
  • Ideal for Double Wall Board: Heavy BC and EB flute constructions and multi-ply sheets cut cleanly without crushing or tearing the liner.
  • Multiple Regrind Cycles: The wear-resistant steel body can be reground repeatedly, extending the effective life of every blade well beyond one service interval.
Technical Specifications
ParameterSpecification
MaterialM42 cobalt high speed steel (W2Mo9Cr4VCo8)
Cobalt ContentApproximately 8%
Working HardnessHRC 66-68
Red HardnessRetains cutting ability up to about 600 °C
Grinding ToleranceWithin 0.02 mm
Surface FinishRa 0.4 µm
Blade Thickness3-10 mm, customized per drawing
Length & WidthCustomized per drawing or original sample
Recommended BoardDouble wall BC/EB flute, 7-ply and abrasive board
Warranty6 months under normal operation
Applications

This M42 slotter blade is the first choice for slotting stations on heavy-duty flexo printer slotters, rotary slotters and folder gluer lines that process double wall containers, heavy-duty shipping cases and board grades that generate high cutting resistance. It is particularly valuable in hot climates or summer production, where line speeds and friction push edge temperatures up and shorten the life of standard blades. Beyond slotting, the same M42 cobalt steel can be supplied for creaser knives, slitter knives and rotary cutoff knives, enabling a converter to run one high-performance steel family across the entire corrugator and converting operation with simplified stock holding.

Packaging & Quality Assurance

Because precision-ground M42 edges are valuable, they are protected with anti-rust oil and rigid edge guards before being packed in carton boxes or plywood cases sized to the blade. ZHIJING operates an ISO9001 quality management system: each batch of M42 steel is verified by spectrometer analysis, hardness is confirmed after heat treatment, and every blade passes a final dimensional and edge inspection before dispatch. Material certificates, test reports and pre-production samples are available on request. Share your machine model, board constructions and blade sizes with our engineers, and we will confirm the correct hardness, geometry and coating option for your production targets.

Products
PRODUCTS DETAILS
M42 Cobalt HSS Slotter Cutting Blade with HRC 66-68 Hardness and Red Hardness Up to 600 °C for Corrugated Carton Slotter Machines
MOQ: 1 piece / 1 pair / 1 set
Price: Negotiation
Standard Packaging: Carton boxes, wooden cases
Delivery Period: Within 25 days
Payment Method: L/C, D/A, D/P, T/T, Western Union
Supply Capacity: 1 piece will take 15 days
Detail Information
Place of Origin
Shanghai, China
Brand Name
ZHIJING
Certification
ISO9001
Model Number
ZJ-M42-SB03
Material:
M42 Cobalt HSS (W2Mo9Cr4VCo8)
Cobalt Content:
Approximately 8%
Hardness:
HRC 66-68
Red Hardness:
Up To 600 °C
Precision:
Within 0.02 Mm
Surface Finish:
Ra 0.4 µm
Blade Thickness:
3-10 Mm, Customized
Blade Size:
Customized Per Drawing
Applicable Board:
Double Wall BC/EB Flute, 7-ply
Advantage:
Hot Hardness, Long Regrind Intervals
OEM & ODM:
Accepted
Warranty:
6 Months
Minimum Order Quantity:
1 piece / 1 pair / 1 set
Price:
Negotiation
Packaging Details:
Carton boxes, wooden cases
Delivery Time:
Within 25 days
Payment Terms:
L/C, D/A, D/P, T/T, Western Union
Supply Ability:
1 piece will take 15 days
Highlight

M42 Cobalt HSS Slotter Blade

,

HRC 66-68 Slotter Cutting Blade

,

Red Hardness 600 °C Slotting Blade

Product Description

The ZHIJING M42 Cobalt HSS Slotter Cutting Blade is a premium replacement part built for corrugated carton slotter machines that run double wall board at high speed. M42, also known as W2Mo9Cr4VCo8, is a cobalt high speed steel containing roughly eight percent cobalt, which dramatically improves red hardness, the ability of the steel to keep its cutting edge when friction raises the temperature at the cutting zone. Where ordinary blades soften and wear quickly once the edge heats up, this cobalt alloy steel maintains hardness at elevated temperatures, so slotting stations keep producing clean cuts during long runs of heavy BC and EB flute board, thick 7-ply sheets, and board with abrasive recycled content.

Every M42 blade is hardened through a carefully controlled austenitizing and triple tempering cycle to reach HRC 66-68, then precision ground to tight tolerances. The combination of extreme room-temperature hardness and retained hot hardness means the blade resists abrasive wear and edge deformation at the same time, giving converters noticeably longer intervals between regrinds on demanding applications. When the edge finally needs attention, standard grinding practices restore the blade, and the cobalt steel body can be reground many times over its working life, which makes the higher initial material cost a sound investment for high-throughput plants.

Key Features
  • Eight Percent Cobalt High Speed Steel: M42 alloy composition delivers the highest hardness available in conventional high speed steels together with superior toughness.
  • Excellent Red Hardness: The cutting edge keeps its hardness at elevated temperatures, preventing softening and rapid wear during continuous high-speed slotting.
  • HRC 66-68 Working Hardness: A triple tempered microstructure supports a very hard, wear-resistant edge that still resists chipping on well-set machines.
  • Precision Ground Geometry: Flatness, parallelism and edge straightness are held within 0.02 mm for consistent slot depth across the full working width.
  • Ideal for Double Wall Board: Heavy BC and EB flute constructions and multi-ply sheets cut cleanly without crushing or tearing the liner.
  • Multiple Regrind Cycles: The wear-resistant steel body can be reground repeatedly, extending the effective life of every blade well beyond one service interval.
Technical Specifications
ParameterSpecification
MaterialM42 cobalt high speed steel (W2Mo9Cr4VCo8)
Cobalt ContentApproximately 8%
Working HardnessHRC 66-68
Red HardnessRetains cutting ability up to about 600 °C
Grinding ToleranceWithin 0.02 mm
Surface FinishRa 0.4 µm
Blade Thickness3-10 mm, customized per drawing
Length & WidthCustomized per drawing or original sample
Recommended BoardDouble wall BC/EB flute, 7-ply and abrasive board
Warranty6 months under normal operation
Applications

This M42 slotter blade is the first choice for slotting stations on heavy-duty flexo printer slotters, rotary slotters and folder gluer lines that process double wall containers, heavy-duty shipping cases and board grades that generate high cutting resistance. It is particularly valuable in hot climates or summer production, where line speeds and friction push edge temperatures up and shorten the life of standard blades. Beyond slotting, the same M42 cobalt steel can be supplied for creaser knives, slitter knives and rotary cutoff knives, enabling a converter to run one high-performance steel family across the entire corrugator and converting operation with simplified stock holding.

Packaging & Quality Assurance

Because precision-ground M42 edges are valuable, they are protected with anti-rust oil and rigid edge guards before being packed in carton boxes or plywood cases sized to the blade. ZHIJING operates an ISO9001 quality management system: each batch of M42 steel is verified by spectrometer analysis, hardness is confirmed after heat treatment, and every blade passes a final dimensional and edge inspection before dispatch. Material certificates, test reports and pre-production samples are available on request. Share your machine model, board constructions and blade sizes with our engineers, and we will confirm the correct hardness, geometry and coating option for your production targets.

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