Phone:
86-15852949220
Extended service lifespan: Full integral heat treatment vs surface-only hardened alternatives delivers 200% higher abrasion resistance verified by laboratory abrasion tests.
Heavy-load structural stability: No bending or deformation after over 8,000 cutting cycles on HRB500E high-strength rebar.
Wide machine compatibility: Fits GQ40/GQ50/GQ60 cutters plus mainstream European, Italian and German hydraulic rebar shears.
Custom dimensional processing: MOQ only 2 pcs; send your technical drawings for custom CNC precision grinding of non-standard blades.
In-stock quick dispatch: Single-piece order acceptable for all standard-size blades with shipment within 24 hours.
Optimized H13 anti-chipping property: Vacuum heat treated to an optimal 50–55 HRC, balancing high hardness and sufficient toughness to drastically reduce edge cracking when cutting HRB500E rebar.
| Material Specification | Hardness(HRC) | Impact Toughness(J/cm²) | Application Scenarios | Relative Wear Resistance Rating |
|---|---|---|---|---|
| H13 Anti-Chipping Hot Work Die Steel | 50–62 (optimized 58–62) | ≥25 | HRB500E rebar, large-diameter bars, rusty/scrap contaminated rebar, high-volume continuous production; top-tier anti-edge-cracking performance | ★★★★★ |
| Cr12MoV Cold Work Die Steel | 55–58 | ~12 | Cold-drawn hard round bars; not recommended for high-impact HRB500E cutting | ★★★★☆ (2~3x service life vs 9CrSi) |
| 9CrSi Alloy Tool Steel | 50–55 | ~15 | Low-carbon plain round bar, light-to-medium construction cutting only | ★★☆☆☆ |
Mild plain round bar ≤25mm → 9CrSi or Cr12MoV
High-strength deformed HRB500E (all diameters) → H13 mandatory; its chip-resistant property prevents edge breakage under heavy cutting impact
Rusty, sand-covered scrap rebar → Custom high-nickel special alloy blade
Stationary GQ series cutter (GQ40/50/60): Four-sided square rotatable blade with four usable cutting edges
Portable hydraulic handheld cutter: Rectangular single/double-edge blade
| Rebar Diameter | Average Cuts per Single Edge | Total Cuts (4-edge square rotatable blade) |
|---|---|---|
| Ø12–Ø18 Small-size | 6,000–8,000 | 24,000–32,000 |
| Ø20–Ø28 Medium-size | 4,000–6,000 | 16,000–24,000 |
| Ø32 & above Large-size | 2,000–3,500 | 8,000–14,000 |
Note: Double the single-edge cutting quantity for double-edge rectangular handheld cutter blades (e.g. 12,000–16,000 total cuts for Ø20–Ø28mm rebar).
Rebar diameter (primary factor)
Small Ø12–18mm bars generate low cutting impact to achieve full rated cutting cycles; oversized Ø32+ HRB500E features high tensile strength that accelerates edge wear and chipping and shortens service life significantly.
Heat treatment & finished hardness
Our vacuum heat-treated H13 fixed at 58–62 HRC realizes optimal hardness-toughness balance to hit upper lifespan limits; inferior salt-bath heat treatment with surface decarburization cuts blade service life by over 50% (under 1,500 cuts per edge).
Single vs stacked multi-bar cutting
Cutting 2~3 HRB500E bars in one cut multiplies lateral shear stress, triggering micro chipping and sharp lifespan reduction; we recommend cutting one bar per stroke for maximum blade durability.
Machine blade clearance & equipment stability
Optimal clearance = approx.10% of corresponding rebar diameter for uniform force distribution; excessive clearance leads to rebar twisting, uneven abrasion and premature blade scrappage.
78×78×17, 80×80×17, 80×80×30, 83×83×16, 83×83×26, 90×90×20, 90×90×26, 100×100×20, 100×100×30, 110×110×20, 100×30×75, 85×65×30
Client: Large-scale rebar processing plant in Chile; daily output: 80 tons HRB500E cut rebar
Original issue: Generic 9CrSi blades chipped and dulled rapidly, requiring full blade replacement every 3 working days
Solution: Switch to our vacuum heat-treated H13 cutter blades (finished hardness 59–61 HRC)
Final Results:
Single blade service life extended from 3 days to 22 days (7x lifespan improvement)
Blade-replacement machine downtime cut down by 65%
Comprehensive cutting cost per ton of finished rebar reduced by 42%
Zero unexpected large edge chipping during full production trial period
Improper material selection: Using brittle Cr12MoV on large-size HRB500E → replace with impact-resistant H13
Incorrect blade clearance setting (target gap =10% of rebar diameter)
Substandard heat treatment; our vacuum processing eliminates internal residual stress effectively
Stacked multi-bar cutting which magnifies instantaneous shear impact
Rotate square four-edge blades periodically to utilize all cutting edges fully
Fasten mounting bolts to specified torque; loose fasteners cause abnormal impact chipping
Set blade clearance at roughly 10% of processed rebar diameter
Deploy H13 grade only for continuous HRB500E production (optimized 50–55 HRC)
Never feed multiple bars for one cutting stroke; process single bar per cut
Regularly inspect blade clearance with a feeler gauge
Standard stocked blades: Available for single-piece purchase, shipped within 24 working hours
Custom CNC machined blades: MOQ 2 pcs, production leadtime:7–10 working days
Attached documents per shipment: Factory material certificate + hardness inspection test report
Compatibility: GQ40/GQ50/GQ60 plus H&K, Erdin, Schnell, Benza and other mainstream European hydraulic rebar cutters
Send your technical drawings or cutting parameter details for formal quotation.
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 |
Are high-hardness steel rebar cutting blades prone to chipping?
Watch our GQ40 steel bar cutter undergo a heavy-duty rebar shearing test. This video demonstrates the exceptional cutting efficiency of our premium alloy steel blades, showcasing clean, precise, and burr-free cuts on high-tensile steel bars. Engineered for ultimate stability and continuous construction workloads, our GQ40 machine and replacement knives deliver peak performance that global steel fabricators trust
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.
Choosing the wrong double-shaft shredder blades leads to premature wear, frequent downtime, and catastrophic edge cracking. This ultimate buying guide from ALAS breaks down how to perfectly match blade materials (such as SKD-11, Cr12MoV, and H13) with your specific input waste (metals, hard plastics, municipal waste, or rubber). Learn how to optimize blade thickness, claw configurations (2/3 claws vs. 6/8 claws), and modular installation structures to maximize your equipment torque, lower energy consumption, and extend blade service life by up to 200 hours
Maximizing Efficiency: A Rebar Cutting Machine Blade Working CaseOn any heavy-duty construction site or steel processing shop, downtime is your worst enemy. You cut rebar day in and day out – high-strength deformed bars – and if the blade can’t keep up, you’re losing money fast.This case looks at wh