Technical guide · 2026-08-14
Iron and Steel Powders
Iron and steel powders range from sponge and water-atomized press-and-sinter feedstock to prealloyed AM powder; compressibility, green strength and alloying route distinguish them.
01
Definition and boundary
This page covers ferrous powders as powder feedstock; it excludes automatic transfer of wrought or cast properties to consolidated parts.
Reference information only: final acceptance is controlled by the ordered product specification, condition, dimensions and certified test results.
02
How the material system works
Powder production controls morphology and compressibility, green strength and carbon potential.
Particle-size distribution governs packing, spreading or compaction.
Consolidation route creates the final microstructure and defects.
03
Representative grades and systems
| Grade or system | Selection focus | Qualification |
|---|---|---|
| ASC 100.29 iron | ASC 100.29 iron powder requires chemistry and process-specific qualification. | Confirm the governing product specification, delivery condition, section size and acceptance tests before treating designations as interchangeable. |
| FLN2-4405 diffusion-alloyed | FLN2-4405 diffusion-alloyed powder requires chemistry and process-specific qualification. | Confirm the governing product specification, delivery condition, section size and acceptance tests before treating designations as interchangeable. |
| 18Ni300 maraging AM | 18Ni300 maraging AM powder requires chemistry and process-specific qualification. | Confirm the governing product specification, delivery condition, section size and acceptance tests before treating designations as interchangeable. |
04
Properties and trade-offs
PSD and morphology
Flow and apparent/tap density
compressibility, green strength and carbon potential
05
Product forms and supply conditions
06
Applications and selection
Applications and selection
- press-and-sinter gears and structural PM
- Powder metallurgy components
- Additive or spray processing
Properties and trade-offs
- Choose process before PSD limits.
- Qualify oxide reduction and lubricant removal.
- Validate consolidated properties separately.
07
Fabrication, durability and inspection
Control oxide reduction and lubricant removal.
Use inert/dry handling appropriate to Ferrous powders.
Apply documented sieving and reuse rules.
08
Procurement checklist
- State Ferrous powders alloy and powder production method.
- Specify particle-size distribution (PSD) range/method, morphology, flow and apparent/tap density.
- Define chemistry, oxygen/interstitial limits, sampling plan, lot blend and virgin/reuse history for Ferrous powders.
09
Standards, sources and review
Standards and designation context
- ASTM B09 powder methods
- ASTM F3049
- ISO/ASTM 52907 and 52928
Authoritative research sources
ASTM International · 2025 fact sheet and active methods
ASTM International · F3049-14(2021)
ISO · ISO/ASTM 52907:2019
ISO · ISO/ASTM 52928:2024