How To Choose Rebar Cutting Blades?

This guide simplifies key points for choosing and using rebar cutting blades, focusing on anti-brittle H13 blades. It covers material selection, equipment matching, rebar types, manufacturing, and buying tips.

1. Blade Material Selection

• H13 (4Cr5MoSiV1)Mainstream high-quality material

• Good wear resistance, toughness, and heat resistance

• No deformation or chipping during long-term, high-intensity cutting

• Ideal for high-strength rebar and large-scale processing

• Long service life reduces transport and customs costs (great for international trade)

• Solves the common problem of brittle fracture when cutting high-strength rebar

• Cr12MoVHigh hardness and wear resistance

• Suitable for hard cold-rolled rebar

• Low toughness – avoid high-impact, large-gap cutting

• 9CrSi (Alloy Tool Steel)Affordable and practical

• Easy to process and harden

• Suitable for ordinary medium/low-strength rebar

• Widely used in small and medium construction projects

2. Equipment Matching & Custom Sizes

Shape Matching

• Square blades: 4 usable sides (rotate to extend service life) – good for large-scale processing

• Rectangular blades: 1 or 2 usable sides – good for small-tonnage cutting machines

Size Matching

• Different cutting machines (GQ40, GQ50, GQ60) need specific blade size, thickness, and bolt hole spacing

• Follow the machine’s instruction manual strictly

3. Choose Based on Rebar Type

• Ordinary round steel: Low hardness, low cutting resistance – use 9CrSi or Cr12MoV (saves cost)

• High-strength ribbed rebar (Grade 3/4): High hardness, ribbed surface wears blades – use H13

• Waste rebar: Corroded, with sand/dirt (wears blades badly) – use high-nickel blades

4. Manufacturing Process

• Choose blades with full grinding and vacuum heat treatment

• Benefits: Uniform hardness, sharp edge, less chipping or dulling

• Poor heat treatment = brittle (easily breaks) or soft (loses sharpness fast)

5. Key Buying Tips

1. Confirm material grade (decides basic performance)

2. Match blade size to your cutting machine (measure original blade first)

3. Check heat treatment and manufacturing quality

4. Choose based on work intensity:            24-hour continuous work: High-alloy, long-life blades

5. Intermittent small-site work: Affordable medium-hardness blades

6. Large-diameter rebar: Blades with strong impact resistance

7. Pick reliable suppliers (stable quality, fast delivery, after-sales support)