440C Stainless Steel Powder Price & List
| Spec. |
Shape |
Particle Size |
Application |
| 440C-DS045 |
Spherical |
15-45 um |
3D printing / additive manufacturing |
| 440C-DS053 |
Spherical |
15-53 um |
3D printing / additive manufacturing |
| 440C-DS105 |
Spherical |
45-105 um |
3D printing / additive manufacturing |
| 440C-DS150 |
Spherical |
45-150 um |
3D printing / additive manufacturing |
| Customizable |
Spherical |
Customizable |
3D printing / additive manufacturing |
Note: We provide customized service. If you don't find the powder you want, please send us an email directly. We can customize it according to your requirements.
440C Stainless Steel Powder
Stainless Steel 440C (
UNS S44004) is a high-carbon, high-chromium martensitic stainless steel. It is renowned for its extremely high hardness, outstanding wear resistance, and certain corrosion resistance capabilities. 440C is a classic material for manufacturing wear-resistant components such as bearings and cutlery. Essentially, it is a tool steel that achieves high hardness through heat treatment (quenching + low-temperature tempering).
Core Characteristics
Extremely High Hardness and Wear Resistance:This is its core characteristic. After proper heat treatment, the hardness of 440C can reach HRC 58-60, or even higher. Its wear resistance surpasses that of the vast majority of stainless steels.
Moderate Corrosion Resistance:Its corrosion resistance is better than that of ordinary carbon steel and low-alloy tool steels, but far lower than that of austenitic stainless steels like 304 and 316. The high chromium content (16-18%) provides basic corrosion resistance, but the high carbon content forms chromium carbides with chromium, slightly reducing the chromium content in the matrix and thereby affecting corrosion resistance.
High Strength and Moderate Toughness:It possesses high compressive strength and tensile strength, but its toughness is relatively low, making it somewhat brittle, especially in the high-hardness state.
Magnetism:As a martensitic steel,
440C is strongly magnetic.
440C Stainless Steel Powder
440C stainless steel powder is an iron-based alloy powder with iron as the main component, chromium content of 16.0-18.0% and carbon content of 0.95-1.2%. 440C stainless steel is used for bearings, nozzles, wear parts of pumps, mold inserts, knives, surgical tools, etc. It can be also used for severe service such as valves, needle valves, balls and seats for check valves and ball bearings.
Preparation Process of 440C Stainless Steel Powder
① Using high-purity
chromium powder, carbon powder, and iron powder melted into 440C stainless steel base material according to the standard composition ratio of 440C stainless steel;
② Producing spherical
440C stainless steel powder through gas atomization process;
③ Screening and vacuum packaging.
Chemical Composition of 440C Stainless Steel Powder
| C |
Si |
Mn |
Ni |
Cr |
Co |
Mo |
| 0.95-1.2% |
≤ 1.0% |
≤ 1.0% |
≤ 0.6% |
16.0-18.0% |
/ |
≤0.75% |
| Al |
Cu |
Ti |
Nb |
P |
S |
Fe |
| / |
/ |
/ |
/ |
≤ 0.035% |
≤0.03% |
Balance |
440C Stainless Steel Powder Application
440C stainless steel powder is primarily used to manufacture small and medium-sized parts that require extremely high wear resistance and hardness, and may have complex shapes. Powder metallurgy technology not only enhances its formability but also fundamentally optimizes its microstructure, thereby improving the material's overall performance. Its applications are mainly concentrated in the fields of high-performance bearings, wear-resistant tools and cutters, industrial wear-resistant components, and surface strengthening. The details are as follows:
Powder Metallurgy - Pressing and Sintering / Metal Injection Molding (MIM)
These are the two main application directions for
440C powder, used to manufacture large batches of highly complex, wear-resistant parts.
Application Advantages:Manufacturing Complex-Shaped Wear-Resistant Parts: Enables direct forming of complex-shaped parts difficult to process by traditional methods, such as cutlery with internal cavities, special bearing cages, etc.
High Material Utilization: Near-net shape forming reduces waste of expensive materials.
More Uniform Performance: The powder metallurgy process avoids carbide segregation possible in traditional casting, resulting in a finer, more uniformly distributed structure, thereby enhancing overall performance.
Typical Processes:Traditional Powder Metallurgy (P/M): Forming by mold pressing followed by sintering, suitable for relatively simple structural parts like bearings and bushings.
Metal Injection Molding (MIM): 440C powder is mixed with a binder and then injection molded, suitable for manufacturing small, precision parts with complex three-dimensional shapes.
Specific Application Components:Wear-Resistant Parts: Bearings, bearing rings, bushings, valve parts, wear-resistant components for pumps.
Cutlery: High-end pocket knives, surgical blades, scissors, industrial cutting blades.
Daily Hardware: Watch cases, high-end stationery parts, wear-resistant tool components.
Additive Manufacturing (3D Printing)
Manufacturing high-performance 440C stainless steel parts using 3D printing technology is still in the development and exploration stage.
Typical Printing Process:Laser Powder Bed Fusion (L-PBF/SLM): Can directly manufacture high-density, high-hardness 440C parts.
Application Characteristics and Challenges:High Crack Sensitivity: The high-carbon martensitic characteristics of
440C make it highly prone to cracking during the rapid laser melting and solidification process. The process window is narrow, requiring extremely high control over process parameters.
Requires Strict Heat Treatment: Precise quenching and tempering heat treatment must be performed after printing to achieve the expected ultra-high hardness.
High Design Freedom: Suitable for creating complex, lightweight wear-resistant structures unachievable by traditional processes, such as customized cutters, special fixtures, etc.
Application Components:Customized cutter prototypes, special wear-resistant fixtures, model bearing components, etc.
Laser Cladding and Surface Strengthening
Using
440C stainless steel powder as a coating material for surface repair or strengthening.
Application Process:Laser Cladding.
Application Purpose:Surface Wear Resistance Strengthening: Cladding a layer of 440C onto substrates like carbon steel or low-alloy steel significantly improves wear resistance at key areas, while the substrate provides toughness and support, reducing costs. For example, strengthening journal surfaces or mold surfaces.
Repair and Remanufacturing: Repairing worn 440C components, such as bearing races or cutter edges.
Hot Isostatic Pressing (HIP)
Used to manufacture fully dense, defect-free high-performance material billets.
Application Process:440C powder is loaded into a canister and formed into a dense billet via Hot Isostatic Pressing.
Application Purpose:Producing High-Performance Billets: The resulting billets have an extremely uniform, segregation-free structure. Their mechanical properties and wear resistance are superior to traditional cast and forged materials. Such billets can be used for subsequent processing into critical components with extremely high reliability requirements, such as aerospace bearings.
Technical Points and Advantage SummaryAdvantages of Powder Metallurgy: Compared to traditional cast and forged 440C, powder metallurgy 440C has finer carbide particles and a more uniform microstructure. This results in:
Better Wear Resistance: Finer, uniformly distributed carbides provide superior wear resistance.
Higher Toughness: Reduces the adverse effect of coarse carbides on toughness.
Improved Grindability: The uniform structure makes finishing and edge grinding easier.
Heat Treatment is Key: Regardless of the powder process used, standardized quenching and low-temperature tempering heat treatment is essential to achieve the high hardness of HRC 58-60.
| Spec. |
Shape |
Particle Size |
Application |
| 440C-DS045 |
Spherical |
15-45 um |
3D printing / additive manufacturing |
| 440C-DS053 |
Spherical |
15-53 um |
3D printing / additive manufacturing |
| 440C-DS105 |
Spherical |
45-105 um |
3D printing / additive manufacturing |
| 440C-DS150 |
Spherical |
45-150 um |
3D printing / additive manufacturing |
| Customizable |
Spherical |
Customizable |
3D printing / additive manufacturing |
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