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Technical procurement data
Standards, supply and inspection
AISI 440C Stainless Steel Bar X105CrMo17 1.4125 SUS440C 440C is a high-carbon martensitic stainless steel designed for high hardness and wear resistance after heat treatment. It offers moderate corrosion resistance, but procurement must focus on annealed condition, cleanliness and the intended hardening route.
| Material / grade | AISI 440C / UNS S44004 / EN 1.4125 / SUS 440C. |
|---|---|
| Product form | Bar |
| Standards and order reference | ASTM A276 and ASTM A484/A484M are common bar references; the final heat-treatment and hardness requirement belongs on the drawing or PO. |
| Dimensions and tolerances | Diameter, length, straightness, stock allowance and end condition are supplied for the planned machining and heat treatment. |
| Surface and supply condition | Annealed hot-finished, peeled, ground or polished bar. |
| Inspection options | PMI, chemistry, annealed hardness, dimensions, surface and optional ultrasonic testing. |
| MTC and traceability | EN 10204 3.1 MTC, heat traceability and inspection report. |
| Typical applications | Bearings, valve components, knives, measuring tools and wear-resistant precision parts. |
| RFQ checklist | Send the bar grade and standard, required dimensions and tolerance, quantity, surface/condition, inspection and certificate requirements, packing preference and delivery destination. |
Final compliance is defined by the purchase order, approved drawing and issued mill documentation. Availability is confirmed for each grade, size and production route.
AISI 440C Stainless Steel Bar X105CrMo17 1.4125 SUS440C
Request AISI 440C Stainless Steel Bar X105CrMo17 1.4125 SUS440C by standard, size and finish, with inspection and mill test certificates from SAKY METAL.
- Material: CrMo17 1.4125 SUS440C
- Dia.: 1mm – 400mm
- Standard : ASTM A276
- Surface : Black, Rough Machined, Turned
What is 440C Stainless Steel?
ASTM A276 standard grade 440c stainless steel is a high carbon martensitic stainless steel, which is generally supplied in the annealed condition with a maximum Brinell hardness of 269 (Rc29) or annealed and cold drawn with a maximum Brinell hardness of 285 (Rc31).
AISI 440C steel is characterized by good corrosion resistance in mild domestic and industrial environments, including fresh water, organic materials, mild acids, various petroleum products, coupled with extreme high strength, hardness and wear resistance when in the hardened and tempered condition. Grade 440C stainless steel is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Small AISI 440C steel sections can be air cooled and quite large sections oil quenched for maximum through hardness.
Otai Steel is one of professional supplier of 440c stainless steel supplier with reliable quality. The following is our supply range and 440c steel chemical composition and other properties.
Equivalent Steel Grades
Chemical Composition
Mechanical Properties
Physical Properties
Equivalent Steel Grades
| Country | USA | BS & DIN | Japan |
| Standard | ASTM A276 | EN 10088 | JIS G4303 |
| Grades | S44004/440C | X105CrMo17/1.4125 | SUS440C |
Chemical Composition
| Standard | Grade | C | Mn | P | S | Si | Cr | Mo |
| ASTM A276 | S44004/440C | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | ≦0.75 |
| EN10088 | X105CrMo17/1.4125 | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | 0.40-0.80 |
| JIS G4303 | SUS 440C | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | ≦0.75 |
Mechanical Properties
| Tempering Temperature (°C) | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness Rockwell (HRC) | Impact Charpy V (J) |
| Annealed* | 758 | 448 | 14 | 269HB max# | – |
| 204 | 2030 | 1900 | 4 | 59 | 9 |
| 260 | 1960 | 1830 | 4 | 57 | 9 |
| 316 | 1860 | 1740 | 4 | 56 | 9 |
| 371 | 1790 | 1660 | 4 | 56 | 9 |
Physical Properties
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (mm/m/°C) | Thermal Conductivity(W/m.K) | Specific Heat | Electrical Resistivity (nW.m) | |||
| 0-100°C | 0-200°C | 0-600°C | at 100°C | at 500°C | 0-100°C (J/kg.K) | ||||
| 440 C | 7650 | 200 | 10.1 | 10.3 | 11.7 | 24.2 | – | 460 | 600 |
Features & Benefits
- After appropriate heat treatment, 440C stainless steel can achieve a high level of hardness, typically between 58-60 HRC, making it suitable for applications requiring high hardness.
- Due to its high carbon content and excellent heat treatment properties, 440C stainless steel exhibits outstanding wear resistance, making it suitable for various applications such as cutting tools, bearings, etc.
- 440C stainless steel can be effectively machined under appropriate conditions to meet various component requirements. However, due to its high hardness and strength, machining may be relatively challenging and requires suitable machining processes and tools.
- 440C stainless steel demonstrates good high-temperature stability, maintaining its hardness and wear resistance under elevated temperature conditions, making it suitable for applications in high-temperature environments.
- The mechanical properties of 440C stainless steel can be adjusted through heat treatment, such as hardness, strength, and toughness, to meet specific application requirements.
Part of Our Clients
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Why Choose Us?
You can get the perfect material according to your requirement at the least possible price.
We also offer Reworks, FOB, CFR, CIF, and door to door delivery prices. We suggest you to do deal for shipping which will be quite economical.
The materials we provide are completely verifiable, right from raw material test certificate to the final dimensional statement.(Reports will show on requirement)
We guarantee to give a response within 24hours(usually in the same hour)
Provide SGS TUV report.
We are fully dedicated to our customers. If it will not possible to meet your requirements after examining all options, we will not mislead you by making false promises which will create good customer relations.
Provide one-stop service.
Feedback From Our Clients
400 series stainless steel rods have several notable advantages, making them favored in various applications.400 series 440C is a high-carbon martensitic stainless steel designed for high hardness and wear resistance after heat treatment. It provides moderate corrosion resistance and is used for bearings, valve components and precision wear parts., such as the manufacturing of mechanical components.
Packaging
1. Packing is quite important especially in a case of international shipments in which consignment pass through various channels to reach the ultimate destination, so we put special concern regarding packaging.
2. SAKY METAL packages every order in numerous ways based on the products. We pack our products in multiple ways, such as,
Our Services
Cutting and Processing Services
Offering customized cutting and processing services to produce metal products that meet specific size and shape requirements.
Heat Treatment
Providing heat-treatment support for applicable metal products when hardness, strength, or other properties need to be adjusted.
Quality Control and Inspection
Implementing strict quality control and inspection processes to ensure that metal products meet relevant standards and customer requirements.
Get a Quote
Please fill in the form below to get a quotation for your project. Moreover, you can get more discount on your first order.
The price is affected by many factors, such as size, quantities, materials, etc., so please provide us with as much project information as possible. In this way, we can offer you the most accurate price shortly.
For more information, tailored products and solutions or any other requirements, you are also welcome to directly get in touch with us via WhatsApp or Email. (Tel/ WhatsApp : +8613764965049 Email: sales@sakymetal.com)