Short Answer
14C28N is a martensitic stainless chromium steel, and its chemistry is optimized for high-quality professional knife applications. Before you write a specification, you need the baseline facts.
Why a Specification Checklist Matters for 14C28N
14C28N is a martensitic stainless chromium steel, and its chemistry is optimized for high-quality professional knife applications.
The manufacturer's datasheet states that hardening and tempering are needed to achieve the correct finish and the properties required by the end user.
The manufacturer's datasheet lists excellent edge performance, very high hardness, and good corrosion resistance among the grade's properties.
Key 14C28N Material Facts for Procurement
Before you write a specification, you need the baseline facts. The manufacturer, Alleima, describes 14C28N as a martensitic stainless chromium steel with chemistry optimized for high-quality professional knife applications. The nominal composition is 0.62 percent carbon, 14 percent chromium, and 0.11 percent nitrogen.
The grade is mainly recommended for knife applications with high demands on edge sharpness, edge stability, and corrosion resistance.
The steel must be hardened and tempered to achieve the correct finish and the properties required by the end user.
The manufacturer's datasheet provides nominal composition values of 0.62 percent carbon, 14 percent chromium, and 0.11 percent nitrogen.
The manufacturer's datasheet lists excellent edge performance, very high hardness, and good corrosion resistance among the grade's properties. The grade is mainly recommended for knife applications with high demands on edge sharpness, edge stability, and corrosion resistance.
The manufacturer mainly recommends 14C28N for knife applications with high demands on edge sharpness, edge stability, and corrosion resistance.
Specifying 14C28N Strip Steel Dimensions
The first part of your checklist is the physical specification of the strip. The manufacturer can supply 14C28N in coils or straightened lengths from 0.5 to 4.0 metres. The standard dimension range is 1.0 to 4.5 millimetres thick and 5 to 380 millimetres wide.
In addition to the standard dimensions, other sizes are offered on request.
The strip steel can be supplied in coils or straightened lengths from 0.5 to 4.0 metres. The published standard dimension range is 1.0 to 4.5 millimetres thick and 5 to 380 millimetres wide, with other sizes offered on request.
The strip steel can be supplied in coils or straightened lengths from 0.5 to 4.0 metres.
The published standard dimension range is 1.0 to 4.5 millimetres thick and 5 to 380 millimetres wide, with other sizes offered on request.
Hardness Verification: What You Can and Cannot Expect
That standard says Rockwell hardness testing can provide useful information for quality control and material selection and is considered satisfactory for acceptance testing of commercial shipments.
However, ASTM E18 also cautions that a Rockwell measurement at one location may not represent the physical characteristics of the whole part or end product.
ASTM E18 states that Rockwell hardness testing can provide useful information for quality control and material selection and is considered satisfactory for acceptance testing of commercial shipments. However, it also cautions that a Rockwell measurement at one location may not represent the physical characteristics of the whole part or end product.
ASTM E18 says Rockwell hardness testing can provide useful information for quality control and material selection and is considered satisfactory for acceptance testing of commercial shipments. ASTM E18 cautions that a Rockwell measurement at one location may not represent the physical characteristics of the whole part or end product.
ASTM E18 says Rockwell hardness testing can provide useful information for quality control and material selection and is considered satisfactory for acceptance testing of commercial shipments.
ASTM E18 cautions that a Rockwell measurement at one location may not represent the physical characteristics of the whole part or end product.
Building a Cautious Incoming Hardness-Verification Request
Here is a cautious approach:
Second, specify a sampling plan.
Third, define acceptance criteria.
When requesting hardness verification, it is important to note that ASTM E18 cautions that a Rockwell measurement at one location may not represent the physical characteristics of the whole part or end product.
Common Mistakes in 14C28N Procurement
ASTM E18 explicitly warns that one location may not represent the whole part.
Putting Together Your Request for a Documented Specification
To move forward, you need to ask the supplier for a documented specification that covers the following:
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3. Heat treatment: State that the steel must be hardened and tempered to achieve the required properties.
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FAQ
What is 14C28N steel?
14C28N is a martensitic stainless chromium steel with a nominal composition of 0.62% carbon, 14% chromium, and 0.11% nitrogen. It is optimized for high-quality professional knife applications, offering excellent edge performance, very high hardness, and good corrosion resistance.
What dimensions are available for 14C28N strip?
The standard dimension range is 1.0 to 4.5 mm thick and 5 to 380 mm wide. The strip can be supplied in coils or straightened lengths from 0.5 to 4.0 meters. Other sizes are available on request.
How should I verify hardness of 14C28N blades?
However, a single measurement may not represent the whole blade.
Does the manufacturer guarantee hardness?
The manufacturer lists 'very high hardness' as a property, but hardness is achieved through hardening and tempering.