SG Powder High Metal
Description
SG Powder High Metal is Okawa's flagship powder high-speed steel at 62-65 HRC. Sub-zero treated for superior edge life in professional scissors.
SG Powder High Metal
Quick look
- Hardness window: 62–65 HRC once Okawa’s sub-zero cycle is complete.1
- Toughness: Powder high-speed steel balances extreme hardness with enough toughness for pro salon workloads.1,2
- Corrosion profile: Stainless matrix plus sub-zero processing resist staining even in chemical-heavy chairs.1
- Weight/feel: Dense yet balanced blank delivers authoritative, controlled closing for precision cuts.1
Why it matters
SG Powder High Metal is Okawa’s flagship—powder high-speed steel refined with sub-zero treatment to purge retained austenite. Stylists get powder-level longevity, tight tolerances, and slide-ready polish that beats conventional cobalt blends on wear.1,2
Shear pairing & edge compatibility
- Precision convex shears: Mirror edges stay sharp for months of dry detailing.1
- Texturising tools: Powder toughness keeps polished teeth crisp for advanced channeling work.1
Technique map
- Advanced dry cutting, shaping, and point detailing where drag or roll can ruin the finish.
- Wet-to-dry salon rotations that still demand stainless reliability between clients.1,2
- Educator or platform work showcasing premium metallurgy.
Real-world stress tests
- Edge retention: Expect 1,300–1,500 salon cuts before noticing glide loss—powder high-speed steel outlasts cobalt and VG-series alloys.1,2
- Impact/drop resilience: Edge will roll slightly rather than chip; professional powder sharpeners can reset the apex cleanly.1
- Weight & in-hand feel: Slightly firmer closing feel gives excellent feedback for precision tension adjustments.1
Maintenance notes
Wipe and oil after each guest, keep tension neutral, and send to powder-capable sharpeners once or twice a year (more often if you live on dry work). Store in padded cases to protect the fine apex.1,2
Industry snapshot
- Okawa SG Cut Series: Flagship Japanese shears cut from SG Powder High Metal for stylists who need top-tier longevity with a stainless safety net.1
Trade-offs
- Premium cost and limited service providers; schedule maintenance in advance.1
- Extreme hardness can bruise if you wrench the pivot tight—stay on top of tension.1
- Slightly heavier feel than lightweight cobalt alloys; pair with stylists who like feedback.1,2
Context and comparison
SG Powder High Metal sits in the same tier as ZA-18 and NPM powder steels: all three are vacuum-atomised particle alloys achieving 63–65 HRC while retaining toughness that would cause conventional high-carbon steel to chip or crack at the same hardness. The key differentiator from ZA-18 is fine carbide size: SG processing typically produces smaller vanadium carbides, which translates to a smoother edge feel on fine hair at the cost of slightly lower chip resistance in dry cutting on coarse textures. For stylists choosing between powder steel options, the tactile edge quality difference is usually more meaningful than the hardness specification alone.
See Also
Verified Sources
- Tertiary 🇯🇵 OKAWA pro-scissors (オオカワプロシザーズ) (reference)
- Secondary 🇯🇵 SisRma — Scissor Information Portal (industry reference)
Frequently Asked Questions
Hard steels like SG Powder High Metal give a crisper, more controlled cut on fine and dry hair compared to mid-range grades. The edge geometry is more stable under friction and heat, which matters for chipping, point-cutting, and precision blunt lines. That precision comes at the cost of sharpening complexity — only specialists with the appropriate wheel should work on blades at this hardness.
Day-to-day care for SG Powder High Metal is straightforward: correct tension, blade dried after colour or water contact, protected storage. At 62–65 HRC, SG Powder High Metal asks little between services — the interval runs to every 12–18 weeks at full capacity. Service must go to someone equipped for high-hardness work; a standard sharpener may flatten SG Powder High Metal’s convex geometry rather than restore it.
Powder metallurgy produces a uniform grain structure throughout the blade — no large carbide clusters, no soft zones. At 62–65 HRC, SG Powder High Metal holds that consistency edge-to-edge, meaning the cutting feel at the tip of the blade matches the heel. For intricate cutting where the whole blade is used — graduation work, feathering — that evenness is the practical benefit.
Comments & questions
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