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NANJING ALAS INTERNATIONAL CO., LTD
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Chemical Composition (Typical): C 0.32-0.45%, Cr 4.75-5.50%, Mo 1.10-1.75%, V 0.80-1.20%, Si 0.80-1.20%, Mn 0.20-0.50%.
Cr and Mo make it more wear-resistant and heat-resistant.
V boosts hardness and keeps the edge sharp longer.
Proper heat treatment (vacuum quenching + tempering) makes it tough and not brittle.
Very wear-resistant, tough, and heat-resistant.
Does not easily bend or chip during long, heavy cutting.
Best for large-scale cutting of high-strength rebar.
Chemical Composition (Typical): C 1.45-1.70%, Cr 11.00-12.50%, Mo 0.40-0.60%, V 0.15-0.30%, Si ≤0.40%, Mn ≤0.40%.
High C and Cr make it very hard and wear-resistant.
Mo and V slightly improve toughness (but not much).
Avoid heavy impact or large-clearance cutting—it may chip.
Much harder and more wear-resistant than regular alloy blades.
Good for cutting hard cold-rolled rebar.
Not very tough—unsuitable for heavy-impact work.
Chemical Composition (Typical): C 0.85-0.95%, Cr 1.20-1.60%, Si 1.50-2.00%, Mn 0.30-0.60%.
Si makes it easier to harden and machine.
Cr improves wear resistance and hardness.
Low alloy content makes it cheap but limits high-strength cutting.
Cheap and practical.
Easy to harden and machine.
Good for cutting ordinary medium and low-strength rebar.
Widely used in small and medium construction projects.
Square blades: Can use all four edges, lasts longer. Good for large-scale processing.
Rectangular blades: Single or double-edged. Fits small-tonnage machines.
Follow the equipment manual for thickness, length, and bolt hole spacing (match models like GQ40, GQ50).
Ordinary round steel (low hardness): Use 9CrSi or Cr12MoV blades to save cost.
High-strength ribbed rebar (hard, ribbed): Use H13 blades (wear-resistant and tough).
Uniform hardness.
Stable sharp edge.
Not easy to chip or go dull.
Optimized hardening depth and toughness.
Solves brittle fracture when cutting high-strength rebar.
Good replacement blades are key for productivity and safety.
Made of high-quality tool steels (H13, 9CrSi).
Hardness: 58-62 HRC (balances toughness and hardness).
Made via vacuum heat treatment.
Four-sided cutting edge: Lasts 4 times longer than single-sided blades.
Universal fit: Works with models like GQ40, GQ42.
CNC precision grinding: Reduces machine vibration.
Rebar ends have more burrs (jagged or deformed).
Loud cracking sounds when cutting.
Visible chips on the blade.
| NO. | Product Name | Specification Dimensions (length x width x height/thickness) ） | Material | Remarks |
| 1 | Rebar Cutting Replacement Blades size,rebar cutting blade size | 78*78*17 mm | 9crsi，SKD-11，H13 | Customization services are available; we can manufacture according to your drawings, with a minimum order quantity of 2 piece. |
| 2 | 80*80*17mm | |||
| 3 | 80*80*30 mm | |||
| 4 | 83*83*16 mm | |||
| 5 | 83*83*26mm | |||
| 6 | 83*83*26 mm | |||
| 7 | 90*90*20 mm | |||
| 8 | 90*90*26mm | |||
| 9 | 100*100*20 mm | |||
| 10 | 100*100*30mm | |||
| 11 | 110*110*20mm | |||
| 12 | 100*30*75 mm | |||
| 13 | 85x65x30 mm | |||
| 14 | Portable Rebar Cutter Replacement Blades size | 26×20×10 mm | ||
| 15 | 30×24×11 mm | |||
| 16 | 36×28×14 mm | |||
| 17 | 40×30×15 mm | |||
Base Grade | Steel Category | Chinese Standard GB/T 1299 | American Standard ASTM | German Standard DIN (W-Nr.) | Japanese Standard JIS |
H13 | Hot Work Die Steel | 4Cr5MoSiV1 | H13 | 1.2344 | SKD61 |
Cr12MoV | Cold Work Die Steel | Cr12MoV | 1.2601 | SKD11 | |
9CrSi | Alloy Tool Steel (Cutting Tool Steel) | 9CrSi | 1.2108 |
Based on different working conditions and budget requirements, we offer three general industrial-grade alloy steel materials:
9CrSi (Alloy Tool Steel): An economical choice. It has good hardenability and machinability, suitable for cutting ordinary medium-to-low strength rebar, and is widely used in small and medium-sized projects.
Cr12MoV (Cold Work Die Steel): High-end wear-resistant type. High carbon and high chromium content, after heat treatment, it has excellent wear resistance, making it an ideal choice for continuous cutting of high-strength rebar. Its service life is much longer than 9CrSi.
H13 (Hot Work Die Steel/Red Hard Steel): High toughness and high wear resistance. It exhibits excellent resistance to chipping and thermal stability in rebar cutting applications, especially suitable for high-speed production lines or online cutting of hot-rolled rebar, and cutting of ultra-thick rebar and composite materials of scrap rebar.
Chipping is usually caused by the following factors:
Insufficient toughness: Using ultra-hard but low-toughness materials to cut large-diameter or ultra-hard rebar can easily lead to brittle fracture. In this case, we recommend switching to H13 material, as its excellent toughness can effectively absorb impact forces.
Improper clearance: Too large or too small a gap between the upper and lower blades will lead to uneven stress, resulting in chipping.
Insufficient heat treatment: Internal stress is not completely eliminated. All our blades use vacuum heat treatment technology to ensure uniform hardness from the inside out, greatly reducing the chipping rate.
Wear resistance: Cr12MoV has significantly better wear resistance than 9CrSi. Under the same working conditions, the number of cuts for Cr12MoV is usually 2-3 times that of 9CrSi.
Cost: 9CrSi is more cost-effective, suitable for projects sensitive to initial purchase costs; although the unit price of Cr12MoV is slightly higher, its lower replacement frequency results in a lower overall cutting cost per ton of rebar.
For high-strength or ribbed rebar, we strongly recommend H13:
If you are facing extremely high operating intensity and are concerned about downtime due to blade chipping, choose H13. Its impact fatigue resistance is top-notch in the rebar processing industry.
Yes. We understand that blade specifications vary among different equipment brands (e.g., from Italy, Germany, or China). We are equipped with a full set of CNC machining equipment, and you only need to provide the following information:
Detailed drawings (including length, width, thickness, and hole dimensions).
Material requirements (9CrSi, Cr12MoV, or H13).
Specifications of the workpiece to be processed (rebar diameter and strength grade).
We can provide a 1:1 precise customized solution.
Regular rotation: Our blades are usually designed with 4 or 8 cutting edges. Please rotate the blade promptly when one cutting edge becomes dull.
Tighten bolts: Ensure the blades are securely installed. Any slight looseness will cause destructive impact during the cutting process.
Control the gap: Adjust a reasonable blade gap according to the rebar diameter, usually about 10% of the rebar diameter.
Nanjing Alas International Co., Ltd. is a professional industrial tooling manufacturer focused on shear blades, bending dies, shredder blades, and custom wear parts. We offer full application engineering, material selection, setup guidance, and after-sales support to global customers.
Tell us your requirements, and our engineering team will provide professional solutions for blade specification, tool life optimization, and cost-effective production.