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440 Series Stainless Steel
DSM
1.1125
440A,440B,440C,440F
SUS440A,SUS440B,SUS440C,SUS440F
68Cr17,85Cr17,108Cr17,Y108Cr17
In the hardened state, it is hard and has high toughness, used for cutting tools, measuring tools, and bearings
Composition of 400 Series Stainless Steel
| C | Mn | Si | P | S | Mo | Cr | |
|---|---|---|---|---|---|---|---|
| 440A | 0.6-0.75% | 1% | 1% | 0.04% | 0.03% | 0.75% | 16-18% |
| 440B | 0.75-0.95% | 1% | 1% | 0.04% | 0.03% | 0.75% | 16-18% |
| 440C | 0.95-1.20% | 1% | 1% | 0.04% | 0.03% | 0.75% | 16-18% |
The main difference between the three lies in the carbon content. The higher the carbon content, the stronger the hardness and wear resistance, but the worse the corrosion resistance and toughness.
Mechanical & Physical Properties
| 440A | 440B | 440C | |
| HRC | 54-58 | 56-59 | 58-61 |
| Wear resistance | ☆☆☆ | ☆☆☆☆ | ☆☆☆☆☆ |
| Corrosion resistance | ☆☆☆☆ | ☆☆☆ | ☆☆ |
| toughness | ☆☆ | ☆ | ☆ |
| Polishing performance | ☆☆☆☆ | ☆☆☆ | ☆☆☆☆ |
| Processability (annealed state) | ☆☆☆ | ☆☆ | ☆ |
Applications
| Knives | Medical Devices | Industrial Uses | |
| 440A | Kitchen knives, food processing knives, folding knives | Surgical scissors, scalpels | Food Machinery Knives |
| 440B | Mid-to-high-end kitchen knives and utility knives | - | Engineering Tools |
| 440C | High-end tactical knives, surgical knives, bearing blades | Surgical blades, precision blades | Precision cutting, bearing parts |
Advantages and disadvantages comparison
| 440A | 440B | 440C | |
| advantage | Good corrosion resistance, moderate toughness, high cost performance | Higher hardness and improved strength | Extremely high hardness and wear resistance, best sharpness retention |
| shortcoming | Slightly lower hardness | Compromise is obvious, not commonly used | Relatively poor corrosion resistance, brittle |
| Recommended Uses | Food industry, outdoor knives | Special knives | Professional high-end cutting tools and precision parts |
Material selection suggestions
| Usage scenarios | Recommended steel grades |
| Long-term contact with water/humidity, corrosive environment | 440A |
| General-purpose tools that require a balance between strength and cost | 440B |
| Pursuing extreme sharpness, high hardness and strong cutting performance | 440C |
Surface
DSM offers a variety of different surface treatments for stainless steel plates. There are1U, 1C, 1D, 1E, 2B, BA, No.4, TR, HL etc.
Label
The label on each pallet shows the relevant material information, including coil number, steel type, size, net weight, etc.; it is convenient for customers to count the goods.
Packing
We can package stainless steel coils according to your specifications. We pack stainless steel coils on wooden pallets. We can also create custom packaging if our export clients ask for it.
Composition of 400 Series Stainless Steel
| C | Mn | Si | P | S | Mo | Cr | |
|---|---|---|---|---|---|---|---|
| 440A | 0.6-0.75% | 1% | 1% | 0.04% | 0.03% | 0.75% | 16-18% |
| 440B | 0.75-0.95% | 1% | 1% | 0.04% | 0.03% | 0.75% | 16-18% |
| 440C | 0.95-1.20% | 1% | 1% | 0.04% | 0.03% | 0.75% | 16-18% |
The main difference between the three lies in the carbon content. The higher the carbon content, the stronger the hardness and wear resistance, but the worse the corrosion resistance and toughness.
Mechanical & Physical Properties
| 440A | 440B | 440C | |
| HRC | 54-58 | 56-59 | 58-61 |
| Wear resistance | ☆☆☆ | ☆☆☆☆ | ☆☆☆☆☆ |
| Corrosion resistance | ☆☆☆☆ | ☆☆☆ | ☆☆ |
| toughness | ☆☆ | ☆ | ☆ |
| Polishing performance | ☆☆☆☆ | ☆☆☆ | ☆☆☆☆ |
| Processability (annealed state) | ☆☆☆ | ☆☆ | ☆ |
Applications
| Knives | Medical Devices | Industrial Uses | |
| 440A | Kitchen knives, food processing knives, folding knives | Surgical scissors, scalpels | Food Machinery Knives |
| 440B | Mid-to-high-end kitchen knives and utility knives | - | Engineering Tools |
| 440C | High-end tactical knives, surgical knives, bearing blades | Surgical blades, precision blades | Precision cutting, bearing parts |
Advantages and disadvantages comparison
| 440A | 440B | 440C | |
| advantage | Good corrosion resistance, moderate toughness, high cost performance | Higher hardness and improved strength | Extremely high hardness and wear resistance, best sharpness retention |
| shortcoming | Slightly lower hardness | Compromise is obvious, not commonly used | Relatively poor corrosion resistance, brittle |
| Recommended Uses | Food industry, outdoor knives | Special knives | Professional high-end cutting tools and precision parts |
Material selection suggestions
| Usage scenarios | Recommended steel grades |
| Long-term contact with water/humidity, corrosive environment | 440A |
| General-purpose tools that require a balance between strength and cost | 440B |
| Pursuing extreme sharpness, high hardness and strong cutting performance | 440C |
Surface
DSM offers a variety of different surface treatments for stainless steel plates. There are1U, 1C, 1D, 1E, 2B, BA, No.4, TR, HL etc.
Label
The label on each pallet shows the relevant material information, including coil number, steel type, size, net weight, etc.; it is convenient for customers to count the goods.
Packing
We can package stainless steel coils according to your specifications. We pack stainless steel coils on wooden pallets. We can also create custom packaging if our export clients ask for it.
Type 440 Stainless steel is also known as "razor-blade steel" and is a high-carbon chromium alloy steel that can be hardened. Heat treatment gives it the highest level of hardness of any stainless steel grade. Type 440 Stainless Steel is available in four grades: 440A 440B 440C. It offers excellent corrosion resistance and abrasion resistant. All grades are easily machinable in their annealed condition. They also resist mild acids, alkalis and foods as well as fresh water and air. Type 440 is hardenable to Rockwell 58 harness.