14C28N SandvikComplete Technical Guide for Knifemakers
14C28N is the most balanced knife-grade stainless steel available today. Developed by Sandvik Materials Technology (Sweden), it combines exceptional toughness — the best in its category according to tests by metallurgist Larrin Thomas —, solid corrosion resistance and remarkable ease of sharpening. It is the steel we selected at VolcanBlades after rigorous analysis, and this guide explains precisely why.
The Sandvik Formula
The composition of 14C28N is the result of precision engineering. Each element plays a defined role: carbon brings hardness, chromium ensures corrosion resistance, and nitrogen — the absolute distinguishing feature of this steel — strengthens both without forming brittle carbides.
| Element | % by mass | Role in steel |
|---|---|---|
| Carbon (C) | 0.28 % | Hardening ability, abrasion resistance — intentionally low content to preserve toughness |
| Chromium (Cr) | 14.0 % | Passive layer Cr₂O₃ → corrosion resistance. No chromium carbides → all Cr remains in solution |
| Nitrogen (N) | 0.11 % | Differentiating element: strengthens passive layer, forms fine nitrides, improves toughness and corrosion resistance |
| Manganese (Mn) | 0.70 % | Deoxidizer, improves hardenability |
| Silicon (Si) | 0.40 % | Deoxidizer, thermal stability |
| Phosphorus (P) | ≤ 0.025 % | Controlled impurity — becomes brittle at grain boundaries if too high |
| Sulphur (S) | ≤ 0.010 % | Controlled impurity — kept at very low levels for knife-grade quality |
Relative visualization of key elements
Nitrogen: the 14C28N Secret
In the designation 14C28N, the final N is the element that fundamentally distinguishes this steel from its direct competitors (440C, AEB-L, VG-10). Nitrogen plays three simultaneous roles:
- 1.Strengthening the passive layer: nitrogen incorporates into the Cr₂O₃ oxide layer that protects the steel. This layer is denser and more stable against food acids, perspiration and humid environments.
- 2.Formation of fine nitrides rather than coarse carbides: with only 0.28% carbon, practically no coarse chromium carbides form. Nitrogen complements carbon action through very fine nitrides, which do not affect toughness. Result: all the chromium content (14%) remains in solid solution, available for corrosion resistance.
- 3.Ultra-fine grain: the presence of nitrogen restrains grain growth at high temperature during austenitisation. Finer grain = superior toughness and better surface finish after polishing.
Source: Sandvik Materials Technology — Technical data 14C28N · Larrin Thomas, KnifeSteel Nerds, “What Is the Best Budget Knife Steel?” (2020)
This combination explains the apparent paradox of 14C28N: a stainless steel with toughness equal to the best non-stainless knife steels (5160, 52100), but with zero rust maintenance.
Mechanical Properties After Heat Treatment
Interpretation of Scores
These scores come from standardised tests by Dr Larrin Thomas, metallurgist and author of Knife Engineering. Toughness is measured by unnotched Charpy test (bars 2.5 × 10 × 55 mm), edge retention by CATRA test (abrasive media, 15° per side sharpening), corrosion by salt spray. The toughness score of 9/10 places 14C28N at the level of the best non-stainless steels (5160, 3V) — an exceptional result for stainless steel.
Professional Heat Treatment Protocol
14C28N is a steel with very predictable thermal behaviour, making it one of the most reliable for industrial or craft production. Here is the optimal protocol:
Cleaning and stainless steel bagging
Dust-off and wrap parts in a stainless steel bag under neutral atmosphere (argon or nitrogen) to avoid decarburisation and scale. Critical for bare laser finishes.
Austenitisation — 1,025–1,040 °C
Optimal temperature: 1,030 °C ± 10 °C. Hold time: 5 to 10 min depending on thickness (3 min/mm). At this temperature, almost all carbon and nitrogen pass into solid solution in austenite. DO NOT exceed 1,050 °C: grain growth becomes explosive and toughness drops.
Quench — hot oil or forced air
Quench in oil at 60–80 °C (preferred). Forced air is acceptable for thin sections (< 3 mm). Avoid water: the brutal thermal shock can induce residual stresses and micro-cracks on laser-cut parts.
Cryogenic treatment (optional)
Cool to −73 °C (dry ice) or −196 °C (liquid nitrogen), hold 30 min. Converts residual austenite to martensite. Hardness gain: +0.5 to +1 HRC. Dimensional stability gain. Recommended for high-end knives requiring perfect mirror finish.
Double tempering — 175–200 °C × 2 × 1 h
Two tempering cycles separated by complete air cooling. Target temperature: 180 °C → ~61–62 HRC. 200 °C → ~60–61 HRC. MANDATORY: never temper above 350 °C — fine chromium carbide precipitation at 400–500 °C destroys corrosion resistance (chromium leaves solid solution).
⚠ Common Mistakes to Avoid
- → Austenitisation above 1,050 °C: coarse grains, toughness drop up to −40%
- → Tempering at 500 °C: loss of corrosion resistance (Cr precipitates as carbides)
- → Single tempering: residual austenite unconverted, dimensional instability
- → HRC target 58–59: insufficient edge retention for demanding use
Performance Profile — Radar Comparison
This chart compares five determining criteria for a knife steel. The larger and more balanced the covered area, the more versatile the steel.
T=Toughness · ER=Edge retention · CR=Corrosion · ES=Ease of sharpening · VM=Value for money
Detailed Comparison Table
Data from CATRA and Charpy tests published by Larrin Thomas (KnifeSteel Nerds, 2020–2021). Comparison at equivalent hardness (~61 HRC). Powder metallurgy steels (PM) are noted.
| Steel | Toughness | Edge Retention | Corrosion | HRC |
|---|---|---|---|---|
| ★ 14C28N | 9 | 3.5 | 7.5 | 60–62 |
| AEB-L | 9 | 3 | 7 | 60–62 |
| 440C | 6 | 4.5 | 7.5 | 57–59 |
| VG-10 | 5 | 5 | 7 | 60–61 |
| N690 | 5.5 | 5.5 | 7.5 | 59–61 |
| S30V (PM) | 4 | 6.5 | 7 | 59–61 |
| MagnaCut (PM) | 9 | 7.5 | 9 | 61–63 |
Toughness Compared — at equivalent hardness ~61 HRC
Source: Larrin Thomas, Knife Steel Nerds (2021). Scale 0–10, normalised unnotched Charpy data.
For Which Uses?
Kitchen Knives
RecommendedResistance to food acids (lemon, vinegar, proteins) is excellent. High toughness allows sharpening at 10–13° per side — angles impossible with a fragile steel. Minimal maintenance: rinsing after lemon cutting is enough.
Bushcraft & Outdoor
RecommendedToughness 9/10 means a green wood bevel or aggressive batoning produces no micro-chipping. The steel resists rain and perspiration without blackening. Performance similar to 5160 in toughness, but stainless.
EDC (Every Day Carry)
Recommended14C28N is the dominant steel on the mid-to-high-end EDC market. The combination of toughness + corrosion resistance + ease of sharpening is perfect for varied daily use without maintenance.
Knifemakers in Production
RecommendedVery stable and predictable laser behaviour. Affordable material cost. Heat treatment tolerance broader than expensive PM steels. Ideal for series of 10 to 500 pieces without excessive specialised equipment.
Hunting Knives
Well SuitedRust resistance is a real advantage for a knife in contact with game, blood and humidity. Toughness prevents chipping on accidental bone contact.
Ultra-Fine High-Performance Blades
Worth ConsideringIf you target more than 400 CATRA cards cut or very abrasive uses (corrugated cardboard, sisal rope in production), 14C28N shows its limits against S30V, N690 or CPM-MagnaCut. In this specific case, investment in PM steel is justified.
Why 14C28N is Optimal for Laser Cutting
VolcanBlades' choice of 14C28N is not commercial chance. It is the result of in-depth technical analysis of compatibility between the steel and our laser cutting and professional heat treatment processes.
Minimal heat-affected zone (HAZ)
With only 0.28% carbon, 14C28N presents a narrow HAZ during laser cutting. Less carbon means less brittle un-tempered martensite in the cut zone. Result: sharp cutting edges without micro-cracks.
No sensitivity to hydrogen-assisted cracking
High-carbon steels (> 0.5%) are susceptible to delayed cracking during gas-assisted laser cuts. 14C28N with its low carbon is practically insensitive to this phenomenon.
Wide heat treatment tolerance
The optimal austenitisation window for 14C28N is ±10 °C — significantly wider than high-carbide steels (±5 °C for some PM). This allows batch production without risk of local overheating.
Predictable deformation behaviour
Low coarse carbide content and fine grain guarantee minimal and reproducible deformation on quenching. Your blanks come out straight — warping is rare and manageable on standard geometries.
Availability and Consistent Quality
Sandvik is one of the world's most rigorous steel producers. Coil dimensional tolerances are tight (< 0.05 mm on thickness), and composition is perfectly homogeneous from lot to lot. No surprises.
3 Common Misconceptions about 14C28N
✗ Myth: ”It doesn't have enough edge retention.”
✓ Reality:Edge retention is not just about abrasion as measured by CATRA test. The high toughness of 14C28N allows sharpening at much sharper angles (10–13° per side vs 17–20° for fragile steel) — which far outweighs moderate abrasion resistance. Carlos Aldeco, knife distributor with 12 years real-world experience, observes: “low-carbide steels with high toughness often have better edge retention in real use than carbide-loaded steels” (KnifeSteel Nerds, 2021).
✗ Myth: ”440C is better because it's harder.”
✓ Reality:440C achieves 58–60 HRC (vs 60–62 HRC for properly treated 14C28N). Its CATRA edge retention is slightly higher (4.5 vs 3.5) but its toughness is significantly lower (6 vs 9). A 440C knife sharpened at 15° will chip where a 14C28N survives. The edge retention gap disappears in daily use.
✗ Myth: ”14C28N knives for sale are often disappointing.”
✓ Reality:True, but responsibility lies not with the steel — it lies with heat treatment. As Larrin Thomas notes: “Production 14C28N is often treated at 58–60 HRC instead of 60–62 HRC” to reduce warranty returns. At 62 HRC with proper double tempering, 14C28N is outstanding. This is precisely why professional knife-specialised heat treatment service makes all the difference.
Sources and References
- → Larrin Thomas, Knife Steels Rated by a Metallurgist — Toughness, Edge Retention, and Corrosion Resistance (KnifeSteel Nerds, 2021)
- → Larrin Thomas, What Is the Best Budget Knife Steel? (KnifeSteel Nerds, 2020)
- → Sandvik Materials Technology, 14C28N — Technical data sheet (Sandvik AB)
- → Larrin Thomas, Knife Engineering: Steel, Heat Treating, and Geometry, 2020 (2nd ed. 2025)
Ready to Work with 14C28N?
VolcanBlades cuts and heat treats 14C28N at 60–62 HRC with a validated thermal protocol. From a single piece, instant quote after uploading your DXF.