You are here: Home » Products » Metal Shear Blade » Industrial Guillotine Shear Blades for Stainless Steel Cutting

Product Category

Rebar Machinery Parts & Tooling

Press Brake Tooling & Bending Dies

Crusher Blade & Chipper blade & Shredder blade

Ironworker Tooling & Replacement Blades

Tire Profiling & Cutting Knives

PHC&Concrete pile machine accessories

Precision Circular Slitting Blades & Rotary Slitter Knives

Industrial Guillotine Shear Blades for Stainless Steel Cutting

Name: Industrial Guillotine Shear Blades for Stainless Steel Cutting
Brand: ALAS
Rating: 5.0 (29 reviews)

Brand: ALAS
Port: Nanjing, China
Payment Terms: T/T, Money Gram
Min. Order: 2
Transport Package: Wooden Crate Packaging

Product Description

If you’re cutting stainless steel on a guillotine shear, you already know the pain—standard blades simply don’t last.

At Nanjing Alas, we engineer heavy-duty shear blades from five proven tool steels: H13, LD, DC53, D2, and Cr12MoV (SKD11). Instead of forcing a single blade past its structural limits, we precisely match each steel grade to a specific thickness range. The result? Maximum blade life, cleaner cuts, and minimized downtime.

All Nanjing Alas blades undergo advanced vacuum heat treatment and precision tempering to achieve an optimal HRC 50–62 balance. We engineer for real-world toughness matched to the actual impact load—not just inflating hardness numbers for a spec sheet. Built to withstand the intense lateral thrust and work-hardening forces that stainless steel exerts on the cutting edge, our blades are fully compatible with Amada, Cincinnati, Peddinghaus, and most other major shear brands.

Recommended Working Range & Thickness Guide

To ensure long service life and predictable maintenance, Nanjing Alas optimizes each of our five blade grades for a comfortable, reliable working range—never pushing materials to their theoretical limits. The table below maps each material to its recommended stainless and mild steel thickness ranges, helping you choose the perfect balance of performance and ROI.

Why Does Blade Material Matter So Much for Stainless Steel?

Stainless doesn't shear like mild steel, and the thicker the plate, the more it punishes the wrong blade.

On 10 mm+ plate, every hit is an impact load — get a blade that's too hard and it chips, sometimes in under 1,500 cuts.

On mid-range sheet (3–10 mm), you're dealing with both wear and shock, so balance is everything.

On thin sheet under 3 mm, the edge just needs to stay sharp, and a soft blade will dull fast enough that you're resharpening every other week.

Pick the right material for the thickness you actually run, and you'll immediately see:

Longer blade life
Fewer sharpening cycles
Less scrap

It's really that simple.

"We see it all the time — shops buy the hardest blade they can find, throw it on everything, then wonder why it chips on thick plate. You don't need the 'best' blade. You need the right blade for what you're cutting."— Senior Metallurgical Engineer, Nanjing Alas Machinery

What's the Recommended Working Range for Each Blade Material?

We don't quote maximum theoretical thicknesses — those numbers look good on a datasheet but kill blade life in real production.

The table below shows the recommended working range for each material: stay inside these bands, and you'll get consistent, long service life with normal maintenance.

Recommended Working Range Table

Material Grade	Standard Equivalents	Hardness (HRC)	Recommended Stainless Steel Thickness	Recommended Mild Carbon Steel Thickness	Best Suited For
H13	GB 4Cr5MoSiV1 / JIS SKD61	50–55	10 mm to 20 mm	12 mm to 25 mm+	Heavy-duty steel service centers, heavy plate fabrication, and high-impact hydraulic shears.
LD	GB 7Cr7Mo2V2Si	58–62	5 mm to 10 mm	6 mm to 12 mm	High-performance, medium-thick plate production with an optimal balance of wear and shock resistance.
DC53	JIS DC53 (Daido)	60–62	3 mm to 6 mm	4 mm to 8 mm	High-precision heavy shearing, continuous long-run automation lines, and clean, burr-free edge requirements.
D2	GB Cr12Mo1V1 / ASTM D2	58–62	1.5 mm to 4 mm	2 mm to 6 mm	Standard metal workshops processing light-to-medium sheets with superior wear resistance.
Cr12MoV / SKD11	GB Cr12MoV / JIS SKD11	58–60	Under 2 mm	Under 4 mm	High-volume general shearing of thin sheets, offering the most cost-effective solution for standard materials.

How Does Vacuum Heat Treatment Affect Real-World Blade Life?

Heat treatment is where the blade actually gets its properties — and it's also where a lot of cheap manufacturers cut corners.

Every blade we make goes through a full vacuum cycle:

Preheat to 850°C
Austenitize at 1,020–1,050°C under vacuum
High-pressure gas quench
Double temper at 500–560°C

What does that mean for you?

Hardness consistency — ±1 HRC through the whole blade, no soft core that bends under load

Low distortion — under 0.02 mm per meter, so your blade gap stays where you set it

Crack resistance — compressive residual stress at the surface fights crack initiation

DC53 is especially good here — its distortion after heat treat is about a third of what you get with SKD11, so it needs less post-treatment grinding and holds its dimensions better.

What Blade Gap Should I Use for My Thickness?

Blade gap is the one setting you can actually adjust on the floor, and it makes a huge difference in both cut quality and blade life.

General rule for stainless steel: set blade clearance to 8–12% of material thickness.

Stainless has high tensile strength and work-hardens easily, so it needs a wider gap than mild steel. Get it wrong and you'll either chip the blade or produce unusable burrs.

Thin stainless (under 2 mm) → Cr12MoV / SKD11

Recommended gap: 0.08 – 0.16 mm

Too wide → heavy burrs, torn edge
Too narrow → edges rub, excessive heat, rapid dulling

Mid-range sheet (3 – 6 mm) → DC53

Recommended gap: 0.24 – 0.72 mm

Clean, burr-free cuts when set correctly
Ideal for automated lines where consistent edge quality matters

Thick stainless plate (10 – 20 mm) → High-toughness wear-resistant steel (LD or similar)

Recommended gap: 1.0 – 2.4 mm

Wider gap accommodates greater material deformation
Prevents corner chipping — the #1 failure mode on thick plate
Requires high-toughness blade material to handle the impact load

All our blades are ground to ±0.01 mm flatness and ±0.005 mm thickness tolerance, so you can actually hit the gap you're aiming for across the full length of the blade.

How Do I Pick the Right Blade for What I Run?

Start with the thickness you cut most — that's your baseline. If you run a mix, pick the blade that covers your highest volume and accept a bit shorter life on the outliers. Or stock two sets and swap them out by material. It's up to you.

Thick plate (10–20 mm stainless) / big hydraulic shears

Go with H13 at HRC 50–55

The molybdenum and vanadium give it great thermal fatigue resistance and toughness — it takes the impact of heavy plate without chipping. This is the workhorse for steel service centers and heavy plate shops running 12–25 mm+ mild steel and 10–20 mm stainless.

Medium-thick plate (5–10 mm stainless) / balanced production

LD at HRC 58–62 is your best bet

It's got the best balance of wear and shock resistance for this range. The high vanadium (1.8–2.2%) refines the grain structure so it resists chipping, while the 58–62 HRC holds an edge through volume runs.

Precision mid-range (3–6 mm stainless) / automated lines

Step up to DC53 at HRC 60–62

This is the premium option for long production runs where you need clean, consistent cuts from start to finish. It's harder than SKD11, tougher than SKD11, and distorts way less in heat treat — so your gap stays precise and the cut quality doesn't drift.

Light-to-medium sheet (1.5–4 mm stainless) / general workshop

D2 at HRC 58–62 is the solid choice

The high chromium (11.5–13.5%) gives it great wear resistance for general shop work on 2–6 mm mild steel and 1.5–4 mm stainless.

Thin sheet (under 2 mm stainless) / high-volume

Cr12MoV/SKD11 at HRC 58–60 gives you the best bang for the buck

It's reliable on under-4-mm mild steel and under-2-mm stainless, and it's the most cost-effective option for shops that mostly run standard thin materials.

Is Upgrading to the Right Blade Actually Worth the Cost?

Short answer: yes, if you're running any kind of volume.

Here's the real math, not the marketing version.

Say you're cutting 12 mm stainless plate with a general-purpose D2 blade. You might get 1,500 cuts before it chips, at $400 a blade** — that's about **$0.27 per cut just in blade cost.

Swap to a heavy-duty H13 blade at $500**, and you'll get **4,000–5,000 cuts**, dropping your per-cut cost to **$0.10–0.13.

That's a 50–60% direct saving right there, before you even count downtime.

Each blade change on a heavy shear takes 45–90 minutes, and if your shop rate is $200–400 an hour, that idle time adds up fast.

Then there's precision — running the correctly matched blade drops part reject and edge-scrap rates from a frustrating 2–3% down to under 0.5%.

On 80+ tons a month of expensive stainless, that is real money.

For most service centers we work with, the payback on matched blades is just 2–3 months.

Frequently Asked Questions

Q: How long do blades actually last in production?

A: The numbers below are benchmark values for 304 stainless on a well-maintained hydraulic shear with proper gap and lubrication. Real-world results can vary — factors like material grade, blade clearance, lubrication, heat treat quality, and machine type can push life 30% lower or up to 50% higher.

Material	Thickness (304 Stainless)	Benchmark Cuts Between Sharpenings
H13	12 mm	4,000–5,000
LD	8 mm	5,000–7,000
DC53	5 mm	6,000–8,000
D2	3 mm	8,000–10,000
Cr12MoV / SKD11	1.5 mm	10,000–12,000

What affects blade life the most?

1. Stainless steel grade

304 / 316 austenitic stainless (high work-hardening, sticky) → life tends toward the lower end of the range
430 / 410 martensitic / ferritic stainless → slower wear, life can reach or exceed the upper end

2. Blade clearance (side clearance angle)

Recommended for stainless: 8–12% of plate thickness
Too small → excessive heat + secondary shearing, life drops sharply
Too large → material tearing + burr formation, edge dulls faster

3. Lubrication & cutting temperature

Using coolant or shearing oil reduces "micro-welding adhesive wear" between stainless and the blade edge
Good lubrication can extend blade life by 20–40%

4. Heat treatment quality

DC53 with deep cryogenic treatment → better wear resistance, longer life
SKD11 that actually hits HRC 58–60 consistently → performs as expected
Poor heat treat (soft spots, uneven hardness) → life can be cut in half

5. Machine rigidity & shearing speed

Hydraulic shears (smooth, steady cut) → longer blade life
Mechanical shears (high impact shock) → shorter blade life due to edge chipping

Q: What if I use a blade outside its recommended range?

A: Nothing good.

Run a thin-sheet blade like Cr12MoV on thick plate and it'll chip or crack from the impact. Run a thick-plate blade like H13 on thin sheet and it'll dull fast because the edge isn't hard enough to hold sharpness.

Either way, you're replacing blades more often and getting worse cuts. Sticking to the range is the cheapest way to operate.

Q: DC53 vs. SKD11 — which one do I actually need?

A: DC53 is basically a better SKD11.

It's about twice as tough, wears 30% slower, and distorts way less in heat treat. For the 3–6 mm range, that means fewer chipping failures and longer runs between sharpenings.

If you're on an automated line or you just hate changing blades, DC53 is worth the premium. If you're a small shop running low volume, SKD11 will do the job fine.

Q: Will these blades fit my Amada / Peddinghaus / Cincinnati shear?

A: Yes. We make custom blades for all the major brands — Amada, Cincinnati, Komatsu, Peddinghaus, you name it.

Send us your OEM drawings or a sample blade and we'll match it.

Q: How long does it take to get custom blades?

A: Standard sizes in all five materials are usually in stock and ship in 3–5 business days.

Custom blades made to your drawings take 15–20 business days, including forging, vacuum heat treat, and precision grinding.

Q: How do I get a quote for my shear?

A: Just send us your machine brand and model, plus the drawing or dimensions of your current blade, through the contact form below.

Our engineering team will look it over and send you a custom quote within 24 hours. We'll also recommend the best material for what you're actually cutting — no upsell, just what works.

If you're tired of burning through blades on stainless and want something that actually lasts, we can help.

Nanjing Alas builds heavy-duty guillotine shear blades in five proven tool steels, each optimized for its own thickness range with vacuum heat treatment and precision grinding. We ship worldwide, offer full technical support, and can make custom blades to your exact machine specs.

Get in touch today for a quote matched to what you actually cut.

English