Evidence-led material guide
14C28N Steel Composition and Properties Explained
Read the official 14C28N composition and learn which properties chemistry can—and cannot—predict in a knife.
Short answer
Alleima lists nominal 14C28N composition at 0.62% carbon, 14.0% chromium, 0.11% nitrogen, 0.2% silicon and 0.6% manganese, with phosphorus and sulfur limits. These numbers identify the grade and help explain its design direction; only controlled processing and finished-knife testing show what the blade actually delivers.
- Carbon and heat treatment work together to create hardness.
- Chromium supports stainless behavior but can be compromised by poor processing.
- Nitrogen is part of the grade design; it is not a stand-alone performance score.
- Nominal chemistry is not a certificate for a particular batch.
Published facts and what they mean
| Decision layer | What the buyer should record |
|---|---|
| C / Cr / N | 0.62 / 14.0 / 0.11% nominal. |
| Si / Mn | 0.2 / 0.6% nominal. |
| P / S limits | Maximum 0.025 / 0.010%. |
A material datasheet describes controlled steel from its producer. It should be treated as the starting specification, while the finished knife is approved through its own drawing, heat-treatment record and test results.
How to use the facts in a knife decision
From chemistry to microstructure
Alloy content only becomes useful after austenitizing, quenching and tempering create the intended microstructure. Temperature, holding time and cooling rate can change hardness, retained austenite, carbide condition and corrosion response.
Why chromium is not a rust-proof switch
The alloy has enough chromium to be classified as stainless, but the available chromium in the finished structure, surface finish, contamination, edge condition and use environment still influence staining.
Why composition charts get misused
Adding alloy percentages or comparing carbon numbers cannot rank complete knives. More wear resistance may also mean slower sharpening; a higher hardness target may need a more conservative edge.
Worked buyer scenario
Decision example
Two suppliers can quote the same nominal composition and still deliver different blades. One sample may have an even grind and controlled heat treatment; the other may show hardness scatter and overheated edges. The chemistry table cannot distinguish them—sample and batch QC can.
Verification and sample plan
- Use the official nominal composition in the material specification.
- Request batch-level material evidence when identity is critical.
- Keep hardness testing separate from chemistry verification.
- Inspect the edge for heat tint, decarburization clues and grind damage.
- Confirm production controls with repeat samples, not one showcase piece.
The acceptance plan should say who tests, which samples are selected, what counts as pass/monitor/reject and what happens when one result falls outside the approved boundary.
Frequently asked questions
Does 0.62% carbon mean every blade has the same hardness?
No. Hardness depends on heat treatment and the final microstructure, not carbon percentage alone.
What does nitrogen do in 14C28N?
It is part of the designed alloy balance. Buyers should use the producer datasheet for grade facts and avoid turning one element into a universal performance claim.
Can handheld XRF confirm 14C28N?
XRF can support alloy screening but is weak for light elements such as carbon and nitrogen. Use a suitable test plan and traceable documents for definitive identification.
Why list phosphorus and sulfur?
They are controlled residual elements. The official limits form part of the grade specification.
Sources and limits
14C28N facts were checked against the Alleima 14C28N product page, 14C28N material datasheet and hardening guide, accessed 13 July 2026.
Producer data gives material guidance, not a warranty for an unspecified finished knife. Current feasibility, compliance, quantity, lead time and sample performance require project-level confirmation.
Turn the guide into a sample brief
Send the knife type, target grade, drawings or reference images, quantity, target market, packaging and acceptance criteria. We will use those details to confirm current feasibility rather than assuming catalog availability.