AUS-8 Steel
AUS-8 is an Aichi stainless blade-steel grade used in documented scissor products. Producer and processor information describes the material, while a finished model supplies its own geometry, size and hardness specification. A useful comparison keeps those evidence levels separate instead of assigning every AUS-8 pair the same service life or cutting role.
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 AUS-8 Steel
- 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.
AUS-8 Steel
Quick look
- Identity: Aichi lists AUS-8 within its blade-steel range.
- Chemistry basis: The structured table transcribes Fukaumi’s published rolled-plate ranges and limits.
- Material hardness: Fukaumi’s 59.0 HRC is a processing reference, not a universal scissor value.
- Finished example: Kanetsune USA specifies WS-38 thinning scissors at 58–59 HRC.
Why it matters
Aichi’s blade-steel page groups AUS-8 with related grades and lists scissors among the application examples. That connects the grade to a documented field of use. It does not say that every AUS-8 product is a hair-cutting tool, that its edge must be convex, or that all makers use the same heat treatment. Aichi application information.
Fukaumi identifies its work as rolling and supplying Aichi’s AUS-series material. Its product table is therefore a useful material source with a specific product-form context. It is not a test certificate for an individual scissor. Retain the publisher, grade, units and table basis when comparing a retailer’s figures. Plate specification.
The selected table lists carbon at 0.70–0.80% and vanadium at 0.10–0.25%. These replace this page’s former 0.70–0.75% and 0.10–0.26% figures. Silicon, manganese, phosphorus, sulfur and nickel are maximum limits in that table; they must not be read as exact additions. Nitrogen is not disclosed, so a corrosion calculation cannot silently treat it as zero.
Shear pairing & edge compatibility
Two named listings show why an alloy label cannot identify an edge or a profession. Kanetsune’s WS-38 is a hair-thinning scissor. Utsumi America places NOVA Slim L in its grooming range and describes a beveled edge with a flat blade. Both listings identify AUS-8. The same material name can accompany different finished designs. WS-38, NOVA Slim L.
| Information to compare | Evidence to request |
|---|---|
| Material identity | The exact grade attached to the model and blade component |
| Edge and blade form | Maker description of the actual variant |
| Size and tooth arrangement | Complete model code and published dimensions |
| Intended work | The maker’s hairdressing, thinning or grooming description |
| Service | Instructions and support for that geometry and model |
A product photograph can help identify a model and visible handle features. It cannot verify the alloy, finished hardness or internal blade contact. The retained NOVA catalog image should be read with the named product description, rather than as metallurgical evidence.
Technique map
Select a tool for the intended task using its complete design and a suitable practical assessment. Blade length, tooth arrangement, edge shape, balance and grip can differ within one material family. A grade table cannot establish that a pair is ideal for wet cutting, dry sliding, point work or a learner’s first professional kit.
For a useful trial, record the exact pair, its adjustment and the task being assessed. Keep observations about that tool separate from claims about every AUS-8 blade. “This pair felt controllable for this task” is a more precise record than attributing the result to a universal steel ranking.
Real-world stress tests
The reviewed sources do not establish that an AUS-8 edge always rolls before chipping, survives a drop, or recovers through quick honing. A dropped or damaged pair needs an assessment of blade contact, pivot condition and the affected edge. The grade name does not diagnose the damage or prescribe material removal.
Likewise, stainless classification does not establish compatibility with a salon chemical or cleaning process. Use instructions for the finished tool, including its coatings and components. A composition range is not an exposure test on the assembled scissors.
Maintenance notes
Follow the model’s cleaning, drying, lubrication and adjustment instructions. Describe changes in cutting or closing behavior to the service provider instead of requesting a new edge profile solely because the blade is AUS-8. The earlier universal semi-convex finishing advice is withdrawn; changing geometry requires the actual model and condition to be understood.
Industry snapshot
Kanetsune USA’s WS-38 listing identifies a 140 mm / 5.5-inch hair-thinning model, AUS-8 blades and 58–59 HRC. This corrects the earlier vague reference to a six-inch Kanetsune cutting shear. It is a named seller-published model specification, not independent testing or a standard for all AUS-8 scissors. Exact model listing.
Utsumi America’s NOVA Slim L page lists 7.5- and 8.5-inch options, with an additional 7.5 MS option. Its stated grooming application and beveled construction should be retained when using it as an AUS-8 example. This page does not infer a hairdressing technique from those lengths. Regional maker listing.
How it compares
| Evidence level | Published example | Meaning |
|---|---|---|
| Material processing reference | Fukaumi: 59.0 HRC | A quench-and-temper reference for its material |
| Finished model specification | Kanetsune WS-38: 58–59 HRC | A stated value for that thinning model |
| Another finished design | NOVA Slim L: AUS-8, beveled edge and flat blade | Geometry and application; no hardness number adopted |
Fukaumi also has a separate mechanical-properties table using HV20. It must not be combined with the HRC reference as if both described the same finished blade or test condition. This page makes no hardness-scale conversion. Comparing two scissors requires matching the evidence level before drawing a practical conclusion.
Trade-offs
A documented grade makes questions more specific; it does not settle the choice. Compare the actual model’s geometry, fit, care requirements, quoted service and intended task. Neither a claim that AUS-8 outlasts all 5Cr/8Cr grades nor a claim that it necessarily trails VG-10 follows from the sources reviewed here.
Sources
The earlier database and trade-summary citations are replaced by the named Aichi, Fukaumi and product records below. The former database fragment remains available. Producer material data and regional product specifications are distinct evidence, with no universal salon-life or toughness ranking inferred.
Related: Steel Types • Edge Types • Scissor Maintenance
See Also
Published material composition
Aichi Techno Metal Fukaumi AUS-8 plate. Published Aichi Techno Metal Fukaumi rolled-plate composition ranges and maximum limits. Not a lot analysis; unreported nitrogen is unknown. Composition source
| Element | Mass % | Value type |
|---|---|---|
| C | 0.7–0.8% | range |
| Si | ≤0.8% | maximum |
| Mn | ≤0.5% | maximum |
| P | ≤0.04% | maximum |
| S | ≤0.005% | maximum |
| Ni | ≤0.3% | maximum |
| Cr | 13–14.5% | range |
| Mo | 0.1–0.3% | range |
| V | 0.1–0.25% | range |
| N | Not disclosed | undisclosed |
Elements absent from this table are unreported in this source, not zero. These material figures do not identify the chemistry of an individual finished scissor.
Indicative PREN: unavailable. No calculation: N lacks a published point value or two-sided range. Missing values and one-sided limits are not zero. Calculation and limits.
Sources
4 sources- 🇯🇵 Aichi Steel: Stainless steels for blades (manufacturer technical guidance)
- 🇯🇵 Aichi Techno Metal Fukaumi: High-strength stainless plate (material supplier)
- Kanetsune USA: WS-38 AUS-8 thinning scissors (regional product listing)
- Utsumi America: NOVA Slim L 75/85 grooming shears (regional product listing)
Frequently Asked Questions
4 answers you can open one at a timeWhat is AUS-8 steel?
AUS-8 is an Aichi stainless blade-steel grade. Aichi lists scissors among its application examples; Aichi Techno Metal Fukaumi publishes a separate rolled-plate composition table. A grade description does not identify every finished scissor’s geometry or condition.
What hardness should AUS-8 scissors have?
There is no universal finished-scissor range in the reviewed evidence. Fukaumi lists 59.0 HRC as a quench-and-temper reference value for its material. Separately, Kanetsune USA lists 58–59 HRC for the WS-38 thinning scissors. Keep each number with its source and scope.
Is AUS-8 always a convex hair-scissor steel?
No. Kanetsune documents AUS-8 in a hair-thinning model, while Utsumi America lists AUS-8 for NOVA Slim L grooming shears with a beveled edge and flat blade. The exact product design determines the edge and intended task.
How should I compare AUS-8 with another steel?
Compare the exact grade sources and the finished models. Check blade material, geometry, handedness, stated hardness, intended use and service support. The name alone does not establish a fixed edge life, sharpening interval, drop response or chemical compatibility.
Comments & questions
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