GIN1 — Silver Steel
Steel typesRead 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 GIN1 — Silver 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.
Description
GIN1 (Silver Steel #1) is Hitachi's entry specialty stainless from Yasuki Works, offering clean edges and easy sharpening for salon scissors.
GIN1 — Silver Steel #1
Quick look
- Hardness: Proterial lists a hardening hardness of HRC 57 or higher.
- Toughness: Moderate carbon with clean stainless matrix; forgiving enough for everyday salon rotation.
- Corrosion profile: 15–17% chromium keeps blades well above the stainless threshold for moisture-heavy environments.
- Weight/feel: Standard stainless density; no surprises in the hand for stylists coming from 440C or VG-series tools.
Why it matters
GIN1—銀紙1号 (ぎんがみいちごう), literally “Silver Paper #1”—is the entry point of Hitachi Metals’ specialty stainless line produced at the Yasuki Works in Shimane Prefecture. The name comes from the 紙鋼 (かみはがね/kami-hagane, “paper steel”) family tradition: each grade is wrapped in colored paper at the mill for identification. Silver paper denotes the stainless series, distinguishing it from the non-stainless white paper (白紙/Shirogami) and blue paper (青紙/Aogami) grades that share the same production lineage. GIN1 sits at the bottom of the silver series, offering a clean stainless matrix with enough carbon to take and hold a working edge without demanding the maintenance attention of its higher-carbon siblings.
GIN-1 is a proprietary steel developed by Hitachi Metals (now Proterial). It is not classified under JIS G 4303 but is part of the Yasuki Hagane (安来鋼) specialty steel series developed specifically for cutlery and scissors applications.
Composition breakdown
GIN1 runs 0.80–0.90% carbon, 15–17% chromium and 0.3–0.5% molybdenum. The restrained carbon keeps the steel predictable during heat treatment while the chromium load comfortably clears the stainless barrier. There is no tungsten, vanadium, or cobalt in the recipe—this is a deliberately simple alloy designed for consistency and ease of sharpening rather than extreme hardness or edge retention.
Manufacturer composition data
Proterial (formerly Hitachi Metals) publishes the full composition for GIN-1:
| Element | Range |
|---|---|
| Carbon (C) | 0.80–0.90% |
| Silicon (Si) | ≤0.35% |
| Manganese (Mn) | 0.45–0.75% |
| Chromium (Cr) | 15.0–17.0% |
| Molybdenum (Mo) | 0.3–0.5% |
| Phosphorus (P) | ≤0.030% |
| Sulfur (S) | ≤0.020% |
Source: Proterial — GIN-1 Product Page
Key fact: Proterial explicitly lists “Various Kitchen knife, Scissors” as the intended application for GIN-1. This is significant — only GIN-1 and GIN-3 in the entire Proterial catalog specifically name scissors as an application.
Heat Treatment (Proterial specifications)
Source: Proterial — GIN-1 Product Page
Shear pairing & edge compatibility
- Semi-convex 5.5–6.0 in cutters: Solid match for general salon work where easy resharpening matters more than maximum edge life.
- Student and apprentice shears: The forgiving matrix lets beginners learn tension and technique without risking expensive chips.
Technique map
- Everyday wet cutting and blunt foundations where a reliable, retensionable edge keeps pace with client flow.
- Scissor-over-comb barbering; the moderate hardness resists rolling through coarse hair without brittleness.
- Color salon rotations where chemical exposure is frequent and easy maintenance is non-negotiable.
Real-world stress tests
- Impact/drop resilience: Moderate hardness means dropped tips tend to roll rather than chip—most damage is field-repairable with a quick hone.
- Weight & in-hand feel: Standard stainless density around 7.7 g/cm³; no lamination tricks, so blade weight is honest and predictable.
Maintenance notes
Wipe and dry after each client; the chromium handles humidity but not standing chemical residue. Oil the pivot as the maker directs and keep tension neutral. GIN1 responds well to conventional whetstones and doesn’t demand specialist convex equipment, making it one of the easiest Hitachi steels to service.
Trade-offs
- Shorter edge life than GIN3, VG-10, or ATS-34—budget for more frequent sharpening cycles.
- No exotic carbide formers, so the edge won’t match the glassy slide of vanadium- or cobalt-enriched steels.
- Limited availability outside Japan; many shear brands skip GIN1 in favor of the higher-spec GIN3.
Sources
- Proterial — GIN-1 Product Page (manufacturer primary)
- Matrix Aida — GIN Steel
- Hayashi Scissors — Steel Materials 刃材 (Japanese)
Related: GIN3 • Steel Types • Edge Types • Scissor Maintenance
See Also
Sources
2 sources- Proterial / Yasugi Specialty Steel (旧日立金属・安来鋼) (GIN-1 product page)
- 🇯🇵 Hayashi Scissors — Official Japan (steel materials)
Frequently Asked Questions
3 answers you can open one at a timeWhat does HRC 57+ mean in practical terms for GIN1 scissors?
Proterial lists GIN1 at a hardening hardness of HRC 57 or higher. Compared to ultra-hard grades above 63 HRC, it is easier to sharpen and more forgiving of minor blade impacts.
How long does GIN1 hold an edge in professional salon use?
There is no set interval for GIN1. Sharpen when the scissor starts to push or fold hair, and follow the maker’s service advice.
What should I know before buying GIN1 scissors?
The main practical point with GIN1 at HRC 57+: it needs a sharpener who works regularly on hard Japanese steels. When service is needed, incorrect technique at this hardness can chip the edge and cut the blade’s working life short.
Comments & questions
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