Heavy-Duty Guillotine & Scrap Shear Knives for Metal Fabrication
Metal Shear Knives
Premium straight shear blades for hydraulic guillotines, alligator shears, and heavy scrap metal shears. Forged from D2, S1 (6CrW2Si), and H13 tool steels. Surface-ground to ±0.05 mm full-length parallelism for burr-free shearing of mild steel, stainless plate, and heavy scrap billets.
- ■Material: D2 (Cr12MoV), S1 (6CrW2Si), H13, High Carbon Steel
- ■Application: Plate Shearing, Alligator Shears, Scrap Metal Balers
■ ISO 9001:2015 Certified
■ In-House Heat Treatment
■ Strict Dimensional Tolerances
■ Global Door-to-Door Delivery
[ Engineering Reference ]
Decisive Specifications
| Material | D2 (Cr12MoV), S1 (6CrW2Si), H13, High Carbon Steel |
|---|---|
| Cold / Mild Steel | High Carbon Tool Steel (HRC 57–59) |
| Stainless / Heavy | D2 / Cr12MoV (HRC 58–60) |
| Scrap / High Impact | S1 / 6CrW2Si / H13 (Shock Resistant) |
| Length Capacity | Up to 6000 mm (Single Piece Seamless) |
| Edge Geometry | 1, 2, or 4 Usable Cutting Edges |
| Tolerance | ±0.05 mm Full-Length Parallelism |
| Application | Plate Shearing, Alligator Shears, Scrap Metal Balers |
■ All values verified via CMM inspection · ISO 9001:2015
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[ Standard Reference ]
Common Standard Dimensions
| Typical Size (L × W × T) | Length (mm) | Width (mm) | Thickness (mm) |
|---|---|---|---|
| 500 × 70 × 22 | 500 | 70 | 22 |
| 510 × 80 × 25 | 510 | 80 | 25 |
| 1025 × 80 × 20 | 1025 | 80 | 20 |
| 1025 × 100 × 25 | 1025 | 100 | 25 |
| 1300 × 80 × 20 | 1300 | 80 | 20 |
| 1300 × 125 × 32 | 1300 | 125 | 32 |
| 3100 × 100 × 25 | 3100 | 100 | 25 |
| Heavy Scrap Shear | Custom | Custom | Up to 100+ |
[ Technical Audit ]
Engineering Advantages
D2 for Stainless & Heavy Plate
Utilizing premium D2 (Cr12MoV) steel deep-hardened to HRC 58–60. It withstands the extreme abrasive wear and work-hardening forces when shearing stainless steel and thick alloy plates.
S1 Shock-Resisting Steel for Scrap
For alligator shears and heavy scrap balers, standard blades shatter. We forge these blades from S1 (6CrW2Si) shock-resisting steel, providing massive core toughness to shear rebar and I-beams without fracturing.
Precision Parallelism (±0.05 mm)
Surface-ground to absolute perfection. Maintaining strict parallelism across lengths up to 6 meters ensures your machine maintains a uniform shear gap, delivering burr-free cuts every time.
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[ Knowledge Base ]
Product FAQs & Buying Guidance
Technical FAQs
01Which alloy should I use for shearing 304 stainless steel?+−
We recommend D2 (Cr12MoV) for stainless steel (304, 316L) and high-strength plates like Hardox. D2's high chromium-carbide matrix withstands the severe work-hardening wear imposed by austenitic stainless. For standard mild steel, high-carbon tool steel provides maximum toughness at a lower cost.
02Our blades keep chipping when cutting mixed scrap metal. What is wrong?+−
You are likely using a blade that is too hard (like D2). Mixed scrap contains unpredictable, heavy solids (like rebar or bolts). When extreme impact hits a hard, brittle blade, it chips or shatters. You need to switch to a shock-resisting alloy like S1 (6CrW2Si) or H13, tempered to a slightly lower hardness (HRC 54–56) to absorb the massive kinetic shocks elastically.
03What edge profile minimizes burrs when shearing high-tensile steel plates?+−
The critical factor is contact uniformity. Uneven blade-to-blade contact concentrates shear force at one end, producing the compressive rollover and tearing burr characteristic of high-work-hardening steels. Our standard tolerance is ±0.05 mm parallelism over 1000 mm; premium ±0.02 mm is specified for stainless and precision applications.
04How do double-edge reversible blades reduce my annual tooling cost?+−
A double-edge (or 4-edge) reversible blade provides multiple independent cutting faces from a single blade body. When edge 1 shows wear, loosen the mounting bolts, flip or rotate the blade, and retorque. This multiplies the blade's lifespan before regrinding is required, reducing per-cut tooling costs drastically.
Why Choose Sureay
01Can you manufacture blades to match my TRUMPF, AMADA, or Durma guillotine exactly?+−
Yes. We carry OEM-matching dimensions for TRUMPF, AMADA, BYSTRONIC, Durma, and Haco platforms. Single-piece blades up to 6000 mm, multi-segment designs for longer tables, and single, double, or quad-edge profiles are all available. Custom lengths are manufactured to drawing within 15 working days.
02Can Sureay manufacture replacement blades for obsolete heavy scrap shears?+−
Yes. For heavy scrap shears (Lefort, Harris, Genesis) or obsolete models, we work from customer-supplied drawings or physical blade samples. A dimensional survey template is available on request for accurate measurement of the blade profile and counter-sunk mounting holes.
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