Extramarise II Cobalt Alloy
Extramarise II is Mizutani’s proprietary cobalt-alloy blade-material name, used on models including ACRO Type-K and ACRO Slider. Mizutani also uses Extramarise for a heat-treatment process. The material designation connects a product to the maker’s specification; blade design and model details remain essential for understanding its intended cutting use.
Read a steel claim as a four-layer record
A grade can be useful evidence, but a finished shear adds maker execution, geometry, condition, and service history. Apply to Extramarise II Cobalt Alloy
- 01 Identify the grade Use a producer or traceable maker designation.
- 02 Name the source layer Separate mill data, maker data, seller copy, and measurement.
- 03 Record execution Heat treatment, geometry, assembly, and finished-blade values stay model-specific.
- 04 Keep the history Condition, use, care, impacts, and service affect the working edge.
Do not inferOne element, HRC value, country adjective, price tier, or steel name cannot rank sharpness, toughness, corrosion resistance, or service life.
Material and process
Mizutani’s global Extramarise II material page describes a cobalt alloy treated through its Extramarise process and lists the products assigned to that material. It supplies a useful link between material name and finished model. It does not provide a full chemical recipe, processing schedule or HRC value.
The maker’s North American materials account adds a relative comparison: I has more molybdenum, II more vanadium, and both have the same cobalt amount. It also describes a process including a sub-zero step. Keep those statements attributed to that regional maker account; no percentages or controlled finished-blade comparison are supplied there.
The names I and II therefore identify different maker materials. They do not, by themselves, establish a generational upgrade, a hardness ranking or an edge-life guarantee. A heat-treatment name is also a separate part of the specification from the alloy’s chemical composition. See the composition guide for how to record those fields.
Named models and intended work
The global material catalog supplies the following examples. Application labels and ratios are the maker’s catalog descriptions, not results of an independent cutting test.
| Model | Published context | Practical comparison |
|---|---|---|
| ACRO Type-K | Blunt-cutting model in several sizes | Compare the chosen size, reach and control |
| ACRO Slider | Slide/stroke-cutting model | Assess the blade designed for that application |
| YURAGI ZERO | Thinning model with a stated 10% ratio | Keep the ratio attached to this model |
| YURAGI 4 and 6 | Thinning models with stated ratios of 15–20% and 25–30% | Compare tooth configuration and intended effect |
These examples show why the model is as important as the material. The same material category contains cutting and thinning tools and more than one intended technique. A thinning percentage is a model specification; the section of hair, placement and number of passes still affect the actual result.
Comparing Extramarise II with I
ACRO Type-K and ACRO Slider offer a comparison within Extramarise II itself. One is cataloged for blunt work, the other for slide/stroke work. Their shared material cannot explain that difference on its own. Read the blade and application specifications before transferring expectations from one model to the other.
For a thinning tool, make a separate comparison. YURAGI ZERO, 4 and 6 have different stated ratios within this same material group. Record the exact model and tooth configuration, then consider the section, placement and intended effect. A material name cannot turn those different tools into a single texturizing specification.
The relative vanadium statement distinguishes II in Mizutani’s regional account, but does not quantify a carbide structure or prove a smoother, denser or tougher finished blade. Likewise, “II” does not establish a second generation or a longer-blade-only material. Those would need their own evidence.
Reading a specification or seller listing
A useful comparison record contains four separate entries:
- The full model name and size, including any version or handedness.
- The maker’s material designation and source page.
- The published blade, handle and application details.
- Any hardness statement with its scale, responsible source and material or finished-model scope.
The cited global and regional material pages leave the hardness field unspecified. If a seller supplies a number, trace it to that exact model rather than importing a value from another Mizutani alloy. A complete record can honestly contain an unknown field; a borrowed number would make it less reliable.
Care and selection
Use the cleaning, drying, lubrication and adjustment instructions supplied for the actual model. Protect the blades in storage and arrange assessment if the tool is damaged or its cutting action changes. Keep previous sharpening and repair information with a used scissor so the technician can assess its current geometry.
Confirm the service route and warranty applicable to the region and version you are buying. The material label does not determine those arrangements or supply a universal service interval.
Sources
- Mizutani global: Extramarise II: material identity and the model/application examples above.
- Mizutani North America: About Mizutani: relative alloying and processing account.
- Mizutani global: Extramarise I: comparison material catalog.
See Also
Extramarise I · Cobalt Alloy · Hardness guide · Scissor Maintenance
Sources
2 sources- 🌐 Mizutani Scissors — Global (Japan HQ) (manufacturer official)
- Mizutani Scissors — North America (manufacturer official)
Frequently Asked Questions
3 answers you can open one at a timeWhat is Extramarise II?
It is Mizutani’s proprietary cobalt-alloy blade-material name. Extramarise also names the heat-treatment process. Identify the exact finished model to understand its design and intended use.
How does Extramarise II differ from I?
Mizutani’s North American account says I has more molybdenum, II more vanadium and both the same cobalt amount. It provides no percentages or controlled performance comparison; the global catalogs list separate model groups.
Does Extramarise II have a published HRC?
The global material page and regional account cited here do not publish a material or finished-model hardness for Extramarise II. A value from another material should not be transferred to it.
Comments & questions
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