Iron-based
Iron-based powder is a raw material of alloy powder with iron as the main component, which is widely used in the fields of mechanical parts, 3C products, porous materials, tooling materials, magnetic materials, shielding materials, surface coatings, etc., and it is the raw material of powder metallurgy with a large dosage, and it has a high cost performance ratio.
4340 Alloy Steel Powder · AISI 4340
Ultra-high strength · Excellent toughness · Specifically for structural components 15-53μm / 50-150μm
Core Advantages
Ultra-high strength
Extremely high hardenability, with both strength and toughness.
Uniform composition
Pre-alloyed with no segregation
Heat treatment flexibility
Quenching and tempering can tailor strength and toughness.
Process adaptation
Adaptation for Additive Manufacturing and Powder Metallurgy
Product Real-World Photos & Microscopic Morphology
Powder SEM morphology
High sphericity, narrow particle size distribution, and excellent flowability.
Real-life photos of the powder
Gray powder, packaged in vacuum-sealed aluminum foil bags or iron drums.
Typical Applications
3D-Printed Parts / Finished Product Showcase
4340 alloy steel powder
TIJO employs a non‑vacuum atomization process to produce 4340 pre‑alloyed powder, which is widely used in high‑strength structural components such as aerospace landing gear, gears, and shafts.
Corresponding grade
| Standard system | Corresponding grade |
|---|---|
| American AISI | 4340 |
| China GB | 40CrNiMoA |
| Japanese JIS | SNCM439 |
| German DIN | 1.6511 |
Chemical Composition (wt%)
| element | C | Yes | Mn | Cr | Ni | Mo | Fe |
|---|---|---|---|---|---|---|---|
| Content range | 0.38-0.43 | 0.15-0.35 | 0.60-0.80 | 0.70-0.90 | 1.65-2.00 | 0.20-0.30 | Bal. |
* The batch COA test report shall prevail.
Particle Size Specifications & Physical Properties
| Particle size specification | D10(μm) | D50(μm) | D90(μm) | Loose packing density (g/cm³) | Tap density (g/cm³) | Flowability (s/50g) | Oxygen content |
|---|---|---|---|---|---|---|---|
| 15–53 μm | 17-23 | 30-35 | 50-58 | ≥3.90 | 4.4-4.9 | ≤25 | ≤500ppm |
| 50-150 μm | 62-72 | 100-115 | 150-175 | ≥4.46 | ≥4.85 | ≤18 | ≤500ppm |
* D10/D50/D90, loose‑packed and tapped densities, and flowability are provided as typical range values; the specific values shall be determined by the COA for each batch. The flowability of ultrafine powder (≤25 μm) is assessed using a powder rheometer.
Heat Treatment Process Reference
| Heat treatment stage | Process parameters | Explanation |
|---|---|---|
| Stress-relief annealing | Hold at 500–600°C, then cool slowly. | Relieve internal stresses |
| Quenching + Tempering | Tempered after quenching, with a hardness of HRC 40–55. | Achieve target resilience |
Typical application areas
Landing gear
Typical application scenarios
Gear
Typical application scenarios
Drive shaft
Typical application scenarios
Structural component
Typical application scenarios
3D printing
Typical application scenarios
4340 Alloy Steel Powder vs. Related Materials
| Material Type | Key Features | Hardness (HRC) | Typical Applications |
|---|---|---|---|
| 4340 | Ultra-high strength and excellent hardenability | 40-55 | Gears, shafts |
| 8620 | Carburizing steel, surface wear resistance | 58–62 after carburizing | Gears, gear shafts |
Recommended Process Parameters
| Process Type | Recommended particle size | Key Process Parameters | Post-processing |
|---|---|---|---|
| L-PBF additive manufacturing | 15–53 μm | Laser power: 200–350 W; layer thickness: 30–50 μm. | Stress-relief annealing + heat treatment |
| Laser Direct Energy Deposition (DED) | 53-150 μm | Power: 1.5–3 kW | Stress-relief annealing |
| MIM injection molding | -300 mesh | Catalytic degreasing + sintering | Carburizing/Quenching |
* The parameters are typical recommended values; actual settings should be adjusted based on the equipment and workpiece.
End-to-end testing capability
Each batch is tested for major elements (C, Cr, Ni, Mo), impurities, particle size distribution, oxygen content, flowability, and density, with a Certificate of Analysis (COA) provided.
Packaging & Delivery
Powder packaging
Vacuum-sealed in a double-layer aluminum foil pouch (to prevent oxidation), with an outer iron or plastic drum.
Specifications: 1 kg, 5 kg, 10 kg, 25 kg, 50 kg per drum
Export packaging
Export orders are packed in wooden crates or palletized and reinforced to protect against moisture and impact.
Compatible with sea freight, air freight, and international express delivery.
Delivery time
Standard particle size in stock; ships within 5–7 days after order confirmation.
Custom particle size or minor formulation adjustments: 7–15 days
Batch Traceability
For each batch, a sample is retained, and the COA report is shipped with the goods.
Supports third-party testing (e.g., SGS)
Free sample
Free samples are provided for process validation.
Small-batch samples; bulk supply upon quality confirmation.
Customized Services
Custom particle size, fine-tuned formulation
Meets special operating conditions and equipment requirements
Shipping documents
COA, MSDS, ingredient list, packing list
Meets export customs clearance requirements and customer in-plant inspection standards.
Technical Support
Providing heat treatment and process parameter guidance.
Assist in resolving issues encountered during use.
Inquire Now for Free Samples
Fill out the form on the right or contact us directly; we will provide product samples, technical data sheets, and price quotes to help you quickly complete your additive manufacturing process validation.
Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
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Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
