Industrial Rebar Shearing Blades for Heavy-Duty Machinery
Industrial Rebar Shearing Blades undergo computer-controlled vacuum gas quenching to eliminate retained austenite and resist mill-scale friction. D2 blocks are locked at 58–60 HRC (batch tolerance ±1.0 HRC) for standard profiles, while H13 blocks are tempered 3 times to 50–55 HRC to stop edge cracking under cyclic peak shocks. All blocks maintain a linear flatness and parallelism tolerance ≤ 0.03 mm/100mm and a total dimensional deviation ≤ 0.05 mm for direct tool holder installation.
ALAS Machinery manufactures custom Rebar Shearing Blades from certified D2 (1.2379, with 1.5% C, 12% Cr, 1% Mo, 1% V) and H13 (1.2344) tool steel grades. Every block undergoes multi-stage vacuum heat treatment to achieve precision structural stability. We maintain strict linear flatness and parallelism tolerances ≤ 0.03 mm/100mm with a total dimensional deviation ≤ 0.05 mm to enable direct tool holder installation on heavy-duty steel fabrication shears worldwide.
Metallurgical Processing & Heat Treatment Records
ALAS eliminates internal residual stresses through advanced computer-controlled vacuum gas quenching and a precise 3-time tempering process to eliminate retained austenite. Hardness values are calibrated strictly to each alloy's chemical specifications: D2 blocks are locked at 58–60 HRC (batch tolerance ±1.0 HRC) to resist abrasive wear from rebar rib friction, while H13 units are tempered to 50–55 HRC to establish a high-toughness, shatter-proof matrix under cyclic dynamic peak shock.
Our steel grade selection directly matches international concrete reinforcement profiles: D2 is engineered for cold-shearing of standard HRB400 (equivalent to ASTM A615 Grade 60), while H13 is mandatory for processing high-strength HRB500 and HRB600 deformed bars (equivalent to ASTM A615 Grade 75 and Grade 80). Field production metrics indicate a single cutting edge yields 18 to 26 tons of sheared rebar under normal operation parameters. To ensure batch consistency, every block undergoes Rockwell hardness verification at three independent surface positions.
Key Strength: High wear resistance and high hardness achieved through multi-stage vacuum gas quenching to eliminate retained austenite.
Best Application: Continuous cold cutting of HRB400 (ASTM A615 Grade 60) deformed steel bars with diameters ranging from 6 mm to 25 mm.
Performance Metric: Delivers a 90% increase in tons per edge compared to ordinary alternative knives, maintaining a strict linear flatness ≤ 0.03 mm/100mm.
2. H13 Steel Specification (1.2344)
Chemical Composition: Standard chromium-based hot-work tool steel formulations.
Locked Hardness Baseline: 50–55 HRC (Stabilized via a computer-controlled 3-time tempering process to thoroughly relieve internal residual stresses).
Key Strength: Ultimate impact toughness and thermal stability to prevent premature cracking under continuous high-frequency heavy loads.
Best Application: Heavy shock-intensive cutting of high-tensile HRB500 (ASTM A615 Grade 75) and HRB600 (ASTM A615 Grade 80) reinforced steel bars with diameters above 32 mm, including inline hot-rolled bar shearing lines.
Performance Metric: Delivers an 85% increase in tons per edge compared to non-vacuum treated components, with a total dimensional deviation restricted to ≤ 0.05 mm.
Universal Alignment Standards: All Rebar Shearing Blades are machined to an absolute linear flatness and parallelism tolerance of ≤ 0.03 mm/100mm.
Dimensional Constraint Limits: Total dimensional deviation is strictly restricted to ≤ 0.05 mm to guarantee direct tool holder installation without extra shims, gaskets, or manual mechanical adjustments.
Precision Level: Matches official OEM dimensional specifications to prevent axial play and restore mechanical factory-level cutting precision instantly upon mounting.
Compatible Machinery Categories
Production Lines: Automatic rebar straightening and cutting production lines.
European Machinery Models: Schnell, Göçmaksan, and MEP.
Standard Series Models: Domestic GQ-series rebar cutters.
Regional Fleet Specifications: Standard American and Asian rebar processing machinery models.
Blueprints & Custom Production
Drawing-Based Machining: Custom fabrication of Bar Cutter Blade and Bar Cutter Blocks directly from customer technical drawings or original physical samples.
Metallurgical Lock: Custom geometries are matched to specific material baselines—D2 tool steel locked at 58–60 HRC (batch tolerance ±1.0 HRC) or H13 tool steel locked at 50–55 HRC (3-time tempering process).
Application Focus: Engineered specifically to eliminate fitment issues for non-standard, obsolete, or imported specialty machines.
The "Working Condition – Material – Hardness" Selection Framework for Rebar Shearing Blades
This structural selection framework implemented by ALAS directly prevents premature blade failure caused by incorrect metallurgical deployment and optimizes total cost of ownership across heavy-duty steel processing environments.
Step 1: Audit Specific Working Conditions
Identify Concrete Reinforcement Profiles: Document the exact steel grades processed, such as standard HRB400 (ASTM A615 Grade 60) versus high-tensile HRB500 / HRB600 (ASTM A615 Grade 75 / Grade 80).
Measure Dimensional Ranges: Categorize production by bar diameters, isolating small-to-medium runs (6–25 mm) from heavy-gauge operations (above 32 mm).
Evaluate Operational Stress Profiles: Define the production mode as either 24-hour continuous automated shearing lines or intermittent batch cutting, alongside the corresponding mechanical impact intensity.
Step 2: Match Tool Steel Grades Mathematically
Select D2 Tool Steel (1.2379): Mandatory for low-impact, steady cold-shearing scenarios involving standard mesh or medium-diameter reinforcement steel.
Select H13 Tool Steel (1.2344): Mandatory for large-diameter bars, inline hot-rolled bar shearing lines, or high-strength bars subjected to cyclic dynamic peak shocks.
Step 3: Implement Isolated Hardness Standards
Lock D2 Hardness at 58–60 HRC: Keeps batch tolerance within ±1.0 HRC (eliminating the old 58–62 HRC risk window) to resist severe abrasive wear from rebar rib structures while maintaining a linear flatness ≤ 0.03 mm/100mm.
Lock H13 Hardness at 50–55 HRC: Utilizes a computer-controlled 3-time tempering process to thoroughly relieve internal residual stresses, establishing a high-toughness matrix that suppresses edge chipping under cyclic impact stress.
Metallurgical Case Study & Performance Metric
The Industry Failure Mode: Many steel fabrication shops incorrectly run high-hardness D2 tool steel on HRB500/HRB600 high-tensile deformed rebar, triggering immediate macro-fractures and edge chipping due to a lack of material impact toughness.
The Cost Optimization Result: Aligning the mechanical application with the exact metallurgical baseline—enforcing a total dimensional deviation ≤ 0.05 mm—allows medium and large steel service centers to reduce annual operational costs (blade procurement expenditures combined with mechanical downtime losses) by 22%.
Rebar Shearing Blades Structured FAQ Module
Q1: Why do standard rebar cutting components suffer from premature edge chipping during continuous production?
Metallurgical mismatch under shock loads. Running low-toughness materials like high-hardness D2 steel on thick high-strength bars causes structural brittle fractures; continuous impact requires an H13 matrix.
Incomplete stress relief during heat treatment. Alternative blades often retain high levels of internal residual stress and retained austenite, which trigger micro-cracking propagation during automated lines.
Improper operational clearance calibration. Failing to lock the upper and lower cutting clearance to a precise 7% to 10% of the target rebar diameter results in severe uneven load concentration.
Q2: What technical specifications allow replacement blades to integrate into non-standard imported processing equipment?
Linear flatness locked at ≤ 0.03 mm/100mm. This tight parallelism baseline matches official OEM dimensions, eliminating axial play inside imported specialty units without manual adjustments.
Total dimensional deviation limited to ≤ 0.05 mm. Restricting geometric variance allows direct tool holder installation without extra shims, gaskets, or thickness corrections.
Drawing-based blueprint customization. Engineering of custom Bar Cutter Blade and Bar Cutter Blocks relies on 3-position Rockwell hardness audits to resolve fitment errors on obsolete machinery.
Q3: What is the mechanical regrinding capacity and edge geometry of ALAS shearing components?
Four-sided indexable layout. The block architecture features a four-sided usable cutting edge design to maximize wear cycles before tool disposal.
3 to 4 technical regrinds. Every component supports 3 to 4 sequential precision regrinds after edge rotation, resulting in a total effective service life four times longer than conventional single-edge alternatives.
Q4: Which metallurgical specification must be deployed for shearing high-tensile ASTM Grade 75 (HRB500E) steel bars?
H13 tool steel (1.2344) baseline. H13 is mandatory because its chromium-based hot-work composition counteracts cracking stress generated by high-yield rebar ribs under cyclic loads.
Hardness locked at 50–55 HRC. This narrow metallurgical window is stabilized via a computer-controlled 3-time tempering process to establish an optimal balance between wear resistance and structural shock toughness.
Q5: What are the standardized manufacturing lead times for standard versus customized batch orders?
Standard catalog items. Processed and shipped within 3 working days from off-the-shelf inventory.
Customized Bar Cutter Blade / Blocks. Require 10 to 15 working days for vacuum heat treatment and precision grinding, dependent on total volumetric capacity.
Q6: How does optimizing the single-edge wear life lower the total cost of ownership for high-frequency fabrication shops?
Reduction in consumable procurement spending. Doubling the tons-per-edge output directly lowers baseline purchasing budgets.
Elimination of mechanical adjustment labor. Minimizing the frequency of tool changeouts decreases the labor hours spent on blade disassembly and installation.
Prevention of downtime revenue losses. Restricting total dimensional deviation to ≤ 0.05 mm eliminates machine jams, leading to a verified 18% to 22% average reduction in annual processing expenditures.
Q7: What parameters govern the product warranty and engineering support structure?
6-month manufacturing warranty. Covers microstructural defects under verified standard mechanical operating conditions.
Clearance and material diagnostics. If failure occurs due to incorrect blade gap settings or material mismatch, engineering support provides precise thermodynamic and clearance alignment protocols.
Q8: What are the minimum order quantities (MOQ) and evaluation policies for tool testing?
Standard inventory MOQ. Fixed at 10 pcs for initial tool holder compatibility audits.
Custom batch MOQ. Negotiable low-volume production runs mapped directly to technical drawings or physical samples.
Evaluation sample policy. 1 to 2 pieces supplied material-charge exempted, with customer allocated freight costs deductible from subsequent bulk invoices upon negotiation.
Optimize Your Tons-Per-Edge Output Now!
Contact the ALAS engineering team today to eliminate edge cracking, align proper blade clearance, or request a factory-direct wholesale quote!
All tons-per-edge and cost-saving metrics are derived from standardized industrial cutting tests under defined operating parameters. Actual blade performance will vary based on rebar grade (ASTM / EN / GB specification), daily production output, routine equipment maintenance standards and regular blade clearance adjustment practices.
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.
