Materials Encyclopedia
Defined materials. Verified criteria.
Materials used by FireForge Knives are selected based on defined performance requirements — not labels, trends, or visual appeal.
This reference exists for one purpose: to allow any buyer to understand what a material does, what it demands in return, and whether it is the right choice for their use.
It does not rank materials. It does not promote them.
Each material is correct for a specific context. None is universally superior.
HOW TO READ THIS REFERENCE
Every steel entry contains five elements:
→ What it is — composition and manufacturing process in plain terms
→ What it does — real cutting behaviour
→ What it demands — maintenance requirements
→ Who it is for — buyer profile and skill level
→ What it is not for — honest limitations
Read the entry for the steel in the knife you are considering.
If the description of the buyer matches you, the steel is appropriate.
If it does not, a different steel will serve you better.
HARDNESS REFERENCE (HRC SCALE)
Hardness is measured on the Rockwell C scale (HRC). In kitchen knives, hardness governs the relationship between edge retention, toughness, and sharpening difficulty.
Understanding this relationship is more useful than the number itself.
LOWER HARDNESS (54–58 HRC)
→ Edge retention: moderate
→ Toughness: high — resists chipping under variable technique
→ Sharpening: fast, forgiving, standard equipment
→ Best for: daily use, variable technique, low-maintenance priority
MID HARDNESS (59–62 HRC)
→ Edge retention: good — longer intervals between sharpening
→ Toughness: balanced — requires more consistent technique than lower-hardness steels
→ Sharpening: standard equipment, predictable response
→ Best for: experienced home cooks and professionals who maintain their knives regularly
HIGH HARDNESS (63–65 HRC)
→ Edge retention: high — significantly longer intervals
→ Toughness: reduced — more sensitive to lateral force and hard surfaces
→ Sharpening: quality whetstones required; more time and patience
→ Best for: experienced users with established knife care habits
EXTREME HARDNESS (65+ HRC)
→ Edge retention: very high
→ Toughness: low — brittle under misuse or hard surfaces
→ Sharpening: specialist equipment required
→ Best for: experienced collectors and precision cutting specialists only
CORE STEELS
Blade core steels define cutting behaviour.
All other materials — cladding, handle, fittings — support the core but do not define the cut.
ENTRY PREMIUM
These steels prioritise reliability, corrosion resistance, and ease of maintenance over maximum edge performance. Appropriate for daily use environments where the knife is used frequently, sharpened regularly, and handled by cooks of any skill level.
7Cr17MoV
Hardness range: 54–57 HRC
Type: Stainless steel
What it is: A chromium-molybdenum-vanadium stainless alloy with conservative hardness. One of the most durable and corrosion-resistant steels in this category.
What it does: Provides a stable, forgiving edge that tolerates inconsistent technique without chipping or rolling. Cutting resistance is moderate. Not optimised for fine sharpness but reliable under repeated use and varied conditions.
What it demands: Frequent honing. Sharpening on standard stones is fast and straightforward. No specialist equipment or technique required.
Who it is for: Cooks who prioritise durability and low maintenance above edge performance. Entry-level purchases. Environments where knives are used heavily and maintained casually.
What it is not for: Cooks seeking refined cutting performance, thin geometry, or extended time between sharpenings.
9Cr18MoV
Hardness range: 56–58 HRC
Type: Stainless steel
What it is: A chromium-molybdenum-vanadium stainless alloy with a step up in hardness over 7Cr17MoV. More edge stability without significantly increasing maintenance difficulty.
What it does: Provides a more refined edge than 7Cr17MoV with improved retention. Responds well to frequent sharpening. Corrosion resistance is high — suitable for humid or high-frequency kitchen environments.
What it demands: Regular honing. Sharpening on standard stones. Fast response — does not require extended time on the stone.
Who it is for: Cooks who want reliable daily performance without specialist knowledge or equipment. First serious knife purchase.
What it is not for: Cooks seeking extended intervals between sharpening or precision cutting performance.
10Cr15
Hardness range: 56–58 HRC
Type: Stainless steel
What it is: A stainless alloy selected for balanced hardness, clean polishability, and neutral cutting behaviour. Sits alongside 9Cr18MoV in performance profile.
What it does: Provides reliable corrosion resistance and a neutral cutting feel. Surface finishes cleanly — appropriate for polished or satin blade aesthetics.
What it demands: Standard maintenance. Responds predictably on any sharpening equipment.
Who it is for: Daily use environments where consistency and low maintenance are the priority.
What it is not for: High-performance or precision-focused cutting.
X50CrMoV15 (1.4116)
Also known as: German steel, 1.4116
Hardness range: 56–58 HRC
Type: Stainless steel
Origin: Germany
What it is: The standard professional kitchen steel used by the major European knife manufacturers for decades. Chromium, molybdenum, vanadium composition. Monosteel construction — no laminate, no cladding.
What it does: Delivers stable, predictable cutting behaviour across a wide range of tasks and ingredients. Tolerates variable technique without edge failure. Corrosion resistance is high. The edge does not reach the sharpness potential of harder steels but maintains functional performance reliably over time.
What it demands: Regular honing — this steel benefits from a honing rod between sharpening sessions. Sharpening is fast on any standard stone. No specialist equipment or skill required.
Who it is for: Cooks who want a workhorse blade that performs consistently, sharpens easily, and requires no specialist knowledge to maintain. Daily professional use. The knife that gets used every day without ceremony.
What it is not for: Cooks who want extended time between sharpenings, thin Japanese geometry, or high edge retention. This steel trades retention for durability and ease — that is its design intent.
10Cr15CoMoV
Also known as: Chinese VG10
Hardness range: 60–62 HRC
Type: Stainless steel
What it is: A chromium-carbon-cobalt-molybdenum-vanadium stainless alloy. The cobalt addition improves wear resistance and edge stability beyond standard stainless steels without the maintenance demands of powder metallurgy steels. Often referenced as the Chinese equivalent of Japanese VG-10.
What it does: Provides better edge retention than X50CrMoV15 and standard entry steels. The edge holds its geometry longer between maintenance cycles. Cutting resistance is lower than X50 at equivalent thickness due to the finer grain structure achievable at higher hardness. Corrosion resistance remains high.
What it demands: Regular honing. Sharpening on standard whetstones (1000–3000 grit). Responds predictably without specialist technique. Faster edge recovery than high-carbide steels.
Who it is for: Cooks who have used entry-level knives and want meaningfully better edge retention without moving into specialist maintenance territory. Experienced home cooks. Entry-level professionals.
What it is not for: Cooks who need maximum retention, fine PM steel performance, or who are unwilling to hone regularly.
12Cr18MoV
Hardness range: ~60 HRC
Type: Stainless steel
What it is: A chromium-molybdenum-vanadium stainless alloy calibrated for structural stability and consistent behaviour rather than maximum hardness. Used in multi-material laminated constructions where the cladding layers carry structural stress and the core handles edge performance.
What it does: Provides consistent edge response and predictable sharpening behaviour across extended use. Designed for stability under load rather than maximum retention. Well-suited to blades with complex laminate structures where the core needs to remain tough and cohesive.
What it demands: Standard sharpening equipment. No specialist abrasives. Maintenance intervals are moderate.
Who it is for: Cooks who want reliable, consistent performance from a laminated blade. Appropriate for all skill levels.
What it is not for: Cooks seeking maximum edge retention or long intervals between sharpening.
ADVANCED PREMIUM
These steels deliver improved edge retention and refined cutting behaviour. They require more consistent maintenance habits than entry steels — not more difficult, but more regular and deliberate.
AUS-8
Hardness range: 57–59 HRC
Type: Stainless steel
Origin: Japan (Aichi Steel)
What it is: A Japanese stainless alloy with fine grain structure and balanced hardness. Slightly finer carbide distribution than comparable Chinese alloys at similar hardness.
What it does: Provides a refined edge with good stability. Sharpens easily and predictably. Corrosion resistance is solid. A reliable mid-range performer that does not demand specialist handling.
What it demands: Standard sharpening equipment. Frequent honing for best results.
Who it is for: Cooks who want a refined Japanese stainless option with accessible maintenance.
What it is not for: Extended intervals between sharpening or high-performance cutting demands.
AUS-10
Hardness range: 60–62 HRC
Type: Stainless steel
Origin: Japan (Aichi Steel)
What it is: A step above AUS-8 in hardness potential. Higher carbon content supports a finer, more stable edge at higher HRC values.
What it does: Improved edge retention over AUS-8. Polishes to a finer edge. Cutting resistance is lower at equivalent geometry. Corrosion resistance remains high.
What it demands: Standard whetstones. More attention to technique than entry steels — the harder edge responds better to consistent sharpening angles.
Who it is for: Experienced home cooks who maintain their knives regularly and want improved retention over entry-level Japanese stainless.
What it is not for: Casual maintenance habits or high-impact cutting tasks.
VG-10
Hardness range: 60–62 HRC
Type: Stainless steel
Origin: Japan (Takefu Special Steel)
What it is: A Japanese chromium-cobalt-vanadium stainless alloy. The cobalt addition improves structural stability at high hardness. One of the most widely used premium daily-use steels in Japanese knife manufacturing.
What it does: Delivers consistent edge retention, predictable sharpening behaviour, and high corrosion resistance. The fine grain structure supports a refined, sharp edge. Well-documented long-term performance across professional environments.
What it demands: Standard whetstones (1000–3000 grit for maintenance, 6000 for refinement). Regular honing. Consistent sharpening angle.
Who it is for: Experienced home cooks and professionals who want a well-established, predictable premium steel with good retention and manageable maintenance.
What it is not for: Cooks seeking extreme hardness, maximum retention, or minimal maintenance. VG-10 rewards regular care — it is not a set-and-forget steel.
Sandvik 14C28N
Hardness range: 58–62 HRC depending on heat treatment
Type: Stainless steel
Origin: Sweden (Sandvik)
What it is: A Swedish nitrogen-chromium stainless alloy. The nitrogen addition refines grain structure and improves corrosion resistance beyond standard stainless steels at equivalent hardness.
What it does: Provides excellent corrosion resistance — among the highest of any steel in this category. Edge stability is reliable and consistent. Sharpening behaviour is straightforward and predictable.
What it demands: Standard sharpening equipment. Responds well to stropping for edge maintenance between sessions.
Who it is for: Cooks in high-moisture environments, or those who prioritise corrosion resistance alongside good edge performance. Professionals in fish or seafood-focused kitchens.
What it is not for: Maximum edge retention or extreme hardness applications.
HIGH PERFORMANCE
These steels deliver significantly improved edge retention over standard stainless. They require deliberate, consistent maintenance. The buyer must understand what they are committing to before choosing a knife in this category.
N690
Hardness range: 58–62 HRC
Type: Stainless steel
Origin: Böhler (Austria)
What it is: A cobalt-enhanced chromium-molybdenum-vanadium stainless alloy from Böhler. The cobalt content improves edge stability and wear resistance compared to cobalt-free alloys at equivalent hardness.
What it does: Delivers strong corrosion resistance with noticeably improved edge retention over standard stainless. The edge holds its geometry under sustained use. Sharpening remains accessible on standard equipment.
What it demands: Standard whetstones. Regular honing. More consistent technique than entry steels.
Who it is for: Experienced cooks who want European steel heritage with performance above standard stainless and maintenance that remains practical.
What it is not for: Casual maintenance or high-impact tasks.
14Cr14MoVNb
Hardness range: 63–65 HRC
Type: Powder metallurgy steel
What it is: A proprietary powder metallurgy steel developed as a high-performance alternative to imported Japanese PM steels. The niobium addition refines carbide structure and improves wear resistance beyond conventional stainless steels.
What it does: Delivers significantly higher edge retention than standard stainless steels. The edge holds its geometry across extended use without requiring frequent sharpening. Cutting resistance is lower at equivalent geometry due to finer carbide distribution. Corrosion resistance is good.
What it demands: Quality whetstones (1000 grit for setting, 3000–6000 for refinement). More time on the stone than conventional steels — but not dramatically more than VG-10. Consistent sharpening angle. End-grain wood or quality plastic cutting boards only.
Who it is for: Experienced cooks who sharpen their own knives and want meaningfully better retention than standard stainless without the extreme demands of ZDP-189. Professionals who maintain their knives regularly.
What it is not for: Casual maintenance habits. Ceramic, glass, or bamboo cutting surfaces. Dishwashers.
Böhler M390
Hardness range: 60–62 HRC (kitchen knife heat treatment)
Type: Powder metallurgy stainless steel
Origin: Böhler (Austria)
Heat treatment: Performed by Böhler
What it is: A powder metallurgy stainless steel from Böhler. The PM process produces a refined, uniform carbide distribution that standard steel manufacturing cannot achieve. Heat treatment is performed by Böhler directly to ensure consistency.
What it does: Delivers high edge retention, strong corrosion resistance, and a dense, stable edge geometry that holds under repeated use. The refined carbide structure means the edge feels consistent throughout its life — it does not degrade unevenly.
What it demands: Quality whetstones. Longer sharpening sessions than standard stainless. Consistent technique. End-grain wood or quality plastic cutting boards. Hand washing and immediate drying.
Who it is for: Serious collectors, experienced professionals, and cooks who invest in knife maintenance and want a blade that holds its performance across extended periods.
What it is not for: First high-end knife purchases. Casual sharpening habits. Hard cutting surfaces.
SRS13
Hardness range: 63–65 HRC
Type: Powder metallurgy high-speed steel
Origin: Japan
What it is: A Japanese powder metallurgy steel with high wear resistance and edge retention. Occupies similar performance territory to SG2/R2 in the Japanese PM steel hierarchy.
What it does: Delivers high edge retention and a refined cutting edge that holds up under professional use. Edge stability is strong across sustained cutting tasks.
What it demands: Quality whetstones, starting at 1000 grit. More time and patience than standard steels. Consistent sharpening angle. End-grain or quality plastic cutting boards only.
Who it is for: Experienced professionals and serious home cooks who maintain their knives with care and want Japanese PM steel performance.
What it is not for: Casual maintenance, hard cutting surfaces, or cooks new to high-hardness steels.
SPECIALIST
These steels operate at the upper boundary of kitchen knife performance. They are not appropriate as a first high-end knife. They reward experience, correct handling, and deliberate maintenance.
ZDP-189
Hardness range: 65–67 HRC
Type: Ultra-high carbon powder metallurgy steel
Origin: Japan — Nippon Shoryu Metals (Hitachi Metals subsidiary)
Lamination: Sanyo Riki Co. Ltd (Japan)
Heat treatment: Hatta Koygo Co. (Japan)
What it is: An ultra-high carbon powder metallurgy steel with approximately 3% carbon and 20% chromium. Developed in Japan and processed entirely in Japan through the full lamination and heat treatment stages. The highest-performance steel used in FireForge knives.
What it does: Delivers extreme edge retention and sharpness. A correctly maintained ZDP-189 blade holds its edge significantly longer than any other steel in this range. Cutting resistance through fine ingredients is exceptionally low. Corrosion resistance is moderate — not as strong as lower-carbon stainless steels.
What it demands:
- Diamond plates or high-quality ceramic whetstones
- Starting at 400–600 grit if edge is significantly dulled
- Finishing at 3000–6000 grit
- Wider edge angles than standard — 15–18° per side recommended to reduce chipping risk
- End-grain wood or quality soft plastic cutting boards only — glass, ceramic, marble, granite, and bamboo will chip this edge
- Hand washing only — never dishwasher
- Immediate drying after washing
- No lateral force, twisting, or hard ingredient contact
Who it is for: Experienced knife users who understand the limitations of extreme hardness, maintain their knives with discipline, and want the highest edge retention available. Collectors. Precision cutting specialists.
What it is not for: First high-end knife purchase. Cooks who sharpen casually or infrequently. Any environment where the knife may be misused, left wet, or placed on hard cutting surfaces.
Note: ZDP-189 is a specialist tool. Its performance is unmatched within its conditions. Outside those conditions, it underperforms significantly compared to tougher, lower-hardness steels.
CLADDING AND OUTER LAYER MATERIALS
Cladding materials surround the core steel. They do not define cutting performance.
Their functions are: structural stress distribution, corrosion protection, blade stability under load, and surface pattern production.
316 / 316L Stainless Steel
The most common cladding material in FireForge laminated knives. High corrosion resistance. Used in multi-layer Damascus constructions as a structural buffer. Does not contribute to edge behaviour.
SUS420J2
Japanese stainless steel used as outer cladding in ZDP-189 Damascus constructions. Provides corrosion protection for the blade body while the core handles edge performance.
SUS405
Outer cladding in 3-layer composite constructions. Anti-rust function. Compatible with high-performance cores.
440C Stainless Steel
High-chromium stainless used in some cladding applications. Provides corrosion resistance and structural support.
Sandvik 14C28N (as cladding)
Used in some constructions as an outer layer. Provides corrosion resistance above standard stainless cladding materials.
1.4116 Stainless Steel
Monosteel blade material in some constructions. Also used as structural cladding where a higher-performance core is paired with a German stainless outer layer.
SECONDARY AND DECORATIVE METALS
Used for bolsters, spacers, ferrules, and structural fittings. Do not affect cutting performance.
- Brass — warm tone, structural bolsters and spacers
- Copper and purple copper — reactive material; develops patina with exposure
- Bronze — structural fittings, warm tone
- Nickel and nickel silver (cupronickel) — corrosion-resistant bolsters and spacers
- Titanium (anodised) — lightweight, corrosion-resistant fittings
- 316L stainless fittings — neutral tone, high corrosion resistance
- Phosphor bronze — accent spacers in specialist constructions
Note: Copper, brass, and bronze elements will develop surface oxidation if exposed to moisture. Blades containing these materials must be dried immediately after use. This is a material behaviour, not a manufacturing defect.
HANDLE MATERIALS
Handle materials are selected for dimensional stability, moisture resistance, tactile response, and long-term durability.
Natural Woods
**Ebony**
Dense, stable hardwood. Very low moisture absorption. Grip remains consistent in dry and lightly wet conditions. Darkens uniformly with age.
**Rosewood**
Dense hardwood with moderate moisture resistance. Natural oils provide some water resistance. Polished surface may reduce grip in very wet conditions.
**Padauk / Padauk Burl**
Dense, dimensionally stable hardwood. Distinctive red-orange grain. Low moisture absorption. Burl variation adds grain complexity without reducing structural integrity.
**Desert Ironwood (North American)**
One of the densest and hardest woods used in knife handles. Exceptional dimensional stability. Very low moisture absorption. Grain is tight and consistent.
**Olive Wood**
Medium-density hardwood with distinctive irregular grain. Natural oil content provides moderate moisture resistance. Each handle has unique grain variation.
**Figured Sycamore**
Light-toned hardwood with distinctive figure. Moderate density. Decorative grain pattern.
**Burnt White Oak**
Heat-treated surface produces a darkened, more stable surface. Moderate density and moisture resistance.
**Walnut**
Warm-toned hardwood. Moderate density. Stable under typical kitchen conditions.
**Acacia**
Moderate-density hardwood. Used in some handle constructions and cutting boards.
**Stabilised Wood**
Natural wood infused with resin under vacuum pressure. Improves moisture resistance and dimensional stability beyond untreated wood. Maintains natural grain appearance.
Synthetic and Composite
**G10**
Fibreglass composite laminate. High durability, dimensional stability, and moisture resistance. Grip is consistent in wet conditions. Low thermal expansion. Does not absorb moisture.
**Micarta**
Linen or paper phenolic composite. Stable under moisture and heat. Develops a worn-in surface texture with use. High impact resistance.
**POM (Acetal / Polyoxymethylene)**
Engineering polymer. Very high dimensional stability and moisture resistance. Neutral grip surface. Common in professional food service environments.
**Carbon Fibre**
High-strength composite with very low weight. Distinctive visual pattern. Stable under moisture. Used in performance-oriented and collector handles.
**Resin / Wood Composite**
Natural wood grain combined with stabilising resin. Combines visual character of natural wood with improved durability.
Natural Accent Materials
**White Ox Bone / White Buffalo Horn**
Used for spacers and ferrules. Structural function at blade-handle junction.
**Black Buffalo Horn**
Used for ferrules. Dense, stable under moisture. Structural function.
MAINTENANCE REFERENCE BY STEEL
**STANDARD MAINTENANCE (entry steels — 7Cr17MoV, 9Cr18MoV, 10Cr15, X50CrMoV15)**
- Hone regularly with a honing rod
- Sharpen on any standard whetstone (1000–3000 grit)
- Hand wash and dry
- Store on magnetic strip, in block, or with blade guard
**CONSISTENT MAINTENANCE (mid-high steels — 10Cr15CoMoV, 12Cr18MoV, AUS-8, AUS-10, VG-10, N690, Sandvik 14C28N)**
- Hone regularly
- Sharpen on quality whetstones (1000–3000 grit maintenance, 6000 for refinement)
- Hand wash and dry immediately
- End-grain wood or quality plastic cutting boards — avoid hard surfaces
- Store properly — blade contact with other metal objects will damage the edge
**DELIBERATE MAINTENANCE (high-performance steels — 14Cr14MoVNb, M390, SRS13)**
- Hone regularly with a quality honing rod or leather strop
- Sharpen on quality whetstones starting at 1000 grit
- More time required per sharpening session than standard steels
- Hand wash and dry immediately
- End-grain wood or quality plastic cutting boards only
- Never dishwasher
**SPECIALIST MAINTENANCE (ZDP-189)**
- Diamond plates or ceramic whetstones required
- Start at 400–600 grit for significant dulling
- Finish at 3000–6000 grit
- Edge angles: 15–18° per side
- End-grain wood or quality soft plastic cutting boards only — no exceptions
- Hand wash and dry immediately after every use
- Never expose to hard surfaces, lateral force, or impact
PROCESSES AND VERIFICATION
Materials used in FireForge knives are processed under controlled manufacturing systems including:
- Vacuum heat treatment
- Cryogenic tempering (selected steels)
- Precision machining and grinding
- Hand finishing
For M390 blades: heat treatment performed by Böhler (Austria).
For ZDP-189 blades: steel sourced from Nippon Shoryu Metals (Japan); lamination by Sanyo Riki (Japan); heat treatment by Hatta Koygo Co. (Japan).
Compliance verified through: CE · LFGB · SGS · FSC (where applicable)
This reference defines materials by use, behaviour, and limits.
It does not rank them.
It does not promote them.
The correct material is the one that matches how you cook, how you maintain your knives, and what you are willing to commit to over time.
FireForge Knives
Defined by use.