Our Blog

D2 vs 14C28N – The Comprehensive Comparison Guide

D2 steel and 14C28N steel are two different knife‑making steels. D2 material is a high‑carbon high‑chromium cold‑work tool steel under the AISI standard. On the other hand, 14C28N is a Swedish powder‑metallurgy stainless steel. In this article, we will cover seven key aspects. These aspects include chemical composition, hardness, toughness, wear resistance, corrosion resistance, grinding difficulty and price. By comparing these points, you can clearly learn the main differences between D2 vs 14C28N.

Table of Content

Hot product

D2 vs 14C28N
D2 Steel
D2 Metal
D2 Tool Steel
D2 Material
Japanese d2 Tool Steel Powdered Version
Steel D2

Chemical Composition - D2 vs 14C28N

Steel Grade

Standard

C

Si

Mn

P

S

Cr

Mo

V

W

N

D2 (%)

ASTM A681-2008(R2015)

1.4-1.60

0.10-0.60

0.10-0.60

 ≤ 0.030

 ≤ 0.030

11.00-13.00

0.70-1.20

0.50-1.10

/

/

14C28N (%)

/

0.62-0.68%

0.50-0.70

0.50-0.70

≤0.025

≤0.010

13.5-14.5%

/

/

/

0.09-0.12

D2 material has more than twice the carbon content of 14C28N, at 1.5 % compared to 0.62 %. Because of this, D2 delivers higher hardness and better wear resistance. On the other hand, 14C28N comes with a higher chromium level, 14 % versus 12 %. Besides chromium, 14C28N adds 0.11 % nitrogen. This nitrogen element can greatly improve its corrosion resistance.

Hardness - D2 vs 14C28N

  • D2 steel: It can reach 60‑64 HRC after heat treatment. Its typical working hardness falls between 60‑62 HRC. AISI D2 contains high carbon at 1.5 % and high chromium at 11.5 %. These elements form plenty of hard carbides. These hard carbides give D2 its high hardness.
  • 14C28N steel: Its recommended hardness range is 55‑62 HRC. The common working hardness is 58‑60 HRC. It can hit 60‑62 HRC with optimized heat treatment.
When we compare hardness between D2 vs 14C28N, D2 shows higher hardness. The hardness gap between D2 vs 14C28N is around 2‑4 HRC. For this reason, D2 offers better wear resistance.

Toughness Comparison - 14C28N vs D2 Steel

  • D2 tool steel: It has relatively low toughness. D2 is a ledeburite steel. Large chromium carbides exist inside its structure. Its microstructure is like concrete mixed with hard stone particles. Stress tends to build up along carbide edges, and cracks may form easily. Its Charpy impact energy is about 24‑30 J.
  • 14C28N material: It features extremely high toughness. 14C28N has very fine and uniform grain structure. When it takes impact force, it tends to roll the edge instead of chipping.
When talking about toughness for D2 vs 14C28N, 14C28N wins clearly. The toughness of 14C28N is several times higher than that of material D2.

Wear Resistance

  • D2 metal: It has excellent wear resistance. Large chromium carbides deliver great resistance against abrasive wear.
  • 14C28N metail: It offers medium‑level wear resistance. Under abrasive wear conditions, its service life is obviously shorter than steel D2.
In the 14C28N vs D2 steel, Wear resistance is one major strength of D2. Even so, D2 tool steel chips more easily compared with 14C28N. Besides, D2 material is harder to grind and repair.

Corrosion Resistance - D2 vs 14C28N

  • AISI D2: It is often referred to as “semi‑stainless steel”. Even if its chromium content is 11.5‑13.0 %, 1.5 % carbon binds most chromium to create chromium carbides. Therefore, there is insufficient free chromium for rust protection. Rust spots may show up under humid conditions or after contact with sweat.
  • 14C28N: It is genuine stainless steel. With 14 % chromium and 0.11 % nitrogen added, 14C28N shows far better corrosion resistance than D2 tool steel.
There is a very large corrosion‑resistance gap between D2 vs 14C28N. This is the most significant difference between D2 and 14C28N.

Machining Difficulty - D2 vs 14C28N

Annealed Condition

Annealed condition: The machinability of the two steels differs greatly under the annealed state. D2 metal contains a large amount of carbides, with a volume fraction of about 13‑15 %. Even though its annealed hardness is no more than 255 HB, the carbide particles themselves are hard. They tend to scratch cutting tools during turning and milling, so tool wear happens fast. On the other hand, 14C28N has fewer carbides at around 5‑7 %. Its annealed microstructure is more uniform. It creates lower cutting force, and cutting tools can serve a longer life.

QT Condition of 14C28N vs D2 Steel

After quenching and tempering, both steels reach roughly 60 HRC. Even so, their grinding performance still shows differences. D2 metal has coarse carbides up to 40 micrometers. Heavy heat generates during grinding with grinding wheels. The grinding wheel wears out quickly, and processing efficiency becomes low. By comparison, the maximum carbide size of 14C28N is only 2 micrometers. It brings low grinding resistance and less heat build‑up. Besides, it is easy to get a smooth finished surface.

FAQ:

Q1: D2 vs 14C28N: What are the differences in chemical composition and key properties between the two steels?

A: Steel D2 is a high‑carbon high‑chromium tool steel with 1.55 % C and 12 % Cr. It delivers high hardness and great wear resistance. However, it has low toughness and tends to rust. On the other hand, 14C28N is a nitrogen‑added stainless steel. Its chemical content includes 0.62 % C, 14 % Cr and 0.11 % N. This steel offers excellent toughness, good rust protection and easy grinding work.

A: 14C28N wins by a wide margin. Its toughness ranks among the top of knife steels, so it can handle heavy impact very well. In contrast, D2 has low toughness. Its toughness is roughly one‑third of 14C28N. It may crack easily with thin edges or rough operation.

A: 14C28N provides much better rust resistance. It contains 14 % chromium plus nitrogen. These elements form a dense passive film. Therefore, its anti‑corrosion performance beats many common stainless steels. As for D2, it is only “semi‑stainless steel”. It does not have enough free chromium. Light rust will easily appear under humid conditions or after sweat contact. You need frequent oil maintenance for D2.

A: D2 steel commonly reaches 58‑62 HRC Rockwell hardness. With ideal heat treatment, it can hit 60‑62 HRC. This high hardness gives it outstanding wear resistance.

A: D2 steel has a tensile strength of about 1600‑1800 MPa. Meanwhile, its yield strength can reach around 1480 MPa. It also owns high compressive strength. Besides, its elastic modulus is roughly 190‑210 GPa.

Conclusion

📩 Contact Keyspark Steel now if you need →

📧 Email: Sales@keysparksteel.com
📱 Mobile/WhatsApp: +86 150 2405 6480

These are our related articles if you want to learn more tool steel comparison:

DC53 Steel vs D2 – Source: Keyspark Steel

The Full Manufacturing Processes of D2 Steel

What is D2 Steel – Source: Keyspark Steel

 

Related Posts