440A stainless steel is a high carbon martensitic stainless steel, this alloy can be heat treated to reach omegahigh hardness. Its carbon content is lower than 440B and 440C giving it improved processability. Known for its good corrosion resistance, high hardness and good wear resistance. Its uses include tool manufacturing, cutting tools, and other applications.
| execution standard | ZEICIN Grade | GB | ASTM | JIS | DIN |
| GB | SUS440A | 68Cr17（7Cr17） | S44002 | SUS440A | 1.4109 |
| C | Cr | Mn | Si | Mo | V |
| 0.65~0.75 | 16.00~18.00 | ≤1.00 | ≤1.00 | ≥0.75 | – |
| Co | S | P | Ni | Nb | W |
| — | ≤0.03 | ≤0.04 | ≥0.60 | – | – |
Our company is one Member of National Ministry of Science and Technology Key Projects “The 13th Five-Year plan ” And enjoy the National government support and financial subsidies.
As Shanghai University and Beijing Iron and Steel Research Institute joint development of production techniques. Due to the high hardness, wear resistance, and corrosion resistance are made of a cutting tool, industrial blade, and surgical instruments, Tellas skilled heat treatment and forging process of SUS440A stainless steel.
Our products are used widely in various industries as high-performance stainless steel raw materials like SUS440A. With both custom and standard sizes for industrial applications, our steady supply chain guarantees a stable quality.
We are honest and sincere to obtain teh purpose of being customer service:
Our SUS440A stainless steel is equally and perhaps better than many leading European, American, or Japanese brands, in terms of performance and reliability, making it a high demand material semlor for many various applications.
The cost performance of our SUS440A products is superior to that of products in Europe, America, and Japan, so that our customers can enjoy great benefits.
SUS440A stainless steel production cycles can be flexible and tailored to your needs. Normal-sized orders can reach in 40 days, so both urgent and normal needs can be satisfied.
SUS440A stainless steel from our company provides the best dimensional stability and durability. It allows customers to save money while still enjoying high-performance, making it a cost-savvy option compared to other premium stainless steels.
| Process | Temperature Range | Processing specification |
| Annealing | 850~900℃ | It is heated to 850~900 ° C, and slowly cooled to 600 ° C in the furnace, after which the air becomes cool. |
| Hardening | 1010~1065℃ | Rapid heating and quenching, quenching should be carried out in air or hot oil. |
| Tempering | 150~370℃ | A lower tempering temperature produces a harder final product. |
Note：1. Tempering: > 370℃, the impact resistance of the material will be damaged.
Tempering: 590~675℃, can improve the impact, offset is the reduction of hardness.
| Property | Value |
| Density | 7.70 g/cm³ |
| Hadness （Rockwell） | 56-59 HRC |
| Tensile Strength | ≥700 MPa |
| Yield Strength | ≥570 MPa |
| Elongation | ≥12% |
| Melting Point | 1427-1515℃ |
440A stainless steel can reach high hardness level (56-59 HRC) after suitable heat treatment, providing good wear and abrasion resistance, making it suitable for tools and cutting edges.
440A presents good corrosion protection due to high chromium content and is particularly effective in fresh water, sub-neutral and weakly basic conditions.
When well heat treated, 440A has excellent edge retention and is well suited for knife blades and cutting tools.
Though it is high hardness, 440A has a good toughness, which can resist moderate impacts without cracking.
440A stainless steel is widely utilized for applications requiring high hardness, wear and corrosion resistance. Common Use Cases are as follows:
Knives, razors, and surgical instruments
Bearings, Valve parts and other industry components
Precision tools, such as drills, chisels, and cutting dies
Tactical knives, hunting knives and other outdoor tools
Is it possible for you to customize the 440A stainless steel as per the customer needs?
Yes, we provide customized service, such as according to customer need to cut size, thickness or surface treatment requirements of 440A stainless steel raw materials. We offer exactly what you need, from knives to medical devices to industrial parts.
Yes, We offer 440A stainless steel as per the requirements in numerous shapes & sizes including stainless steel pipe, stainless steel sheet, stainless steel plate，stainless steel strips, stainless steel rolls, etc. All products can cut and process the needs of customers as per their requirements.
Is 440A stainless steel easy to machine into shape?
440A stainless steel has better machine ability than 440C and it is easier to cut, weld and form than other high-carbon stainless steels. We offer precision machining services to help ensure your products are dimensioned precisely and perform well in high loads.
Reach out to us — The best way to contact us is:
Tel：+86 578-3213463
WhatsApp：+86-13757896261
Email：zeicin@zeicin.com
