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In every order
- Full lot COA — PSD, sphericity, flow rate, chemistry
- Qualified parameter sets for the major LPBF systems
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- Free U.S. shipping over $200 · fast dispatch from L.A.
Materials, Iron Base, LPBF (DMLS) 3D Printing Materials, Metal Powders 3D Printing Materials · Metal LPBF
A-Powder 17-4PH Stainless Steel Alloy Powder for Metal 3D Printing | LPBF Compatible – 10 kg / 22 lbs
Additive Plus A-Powder — industrial 17-4PH stainless for LPBF at an accessible price.
- ✓ Gas-atomized, low-oxygen — full COA on every lot
- ✓ Small, workable volumes — no mill minimums
- ✓ Fast dispatch from Los Angeles
NDA standard
Ships in 1–2 business days
Spec-match guarantee on every lot
Built for production teams
What your process engineer actually checks
Locked, traceable lot chemistry
Every lot ships with a COA documenting PSD, sphericity, flow rate, apparent density, and full chemistry — and a lot number you can trace. Aerospace and medical teams reorder 4+ times without re-qualifying.
Qualified parameters, not just powder
Validated parameter sets for EOS M 290, Renishaw 500Q, SLM 280, and our own AO Metal LPBF ship with the order. Load the profile and hit density on the first build — no parameter-development burn.
A materials engineer on the line
Questions on ferrite content, flowability, recyclate ratios, or HIP response? A materials engineer answers directly — not a contact-form bot. Most replies in under 4 hours, NDA standard.
About this product
A-Powder 17-4PH is Additive Plus’s own-brand precipitation-hardening stainless steel for laser powder bed fusion (LPBF): high strength and hardness with good corrosion resistance, fully heat-treatable — the same industrial quality at an accessible price.
Why teams buy A-Powder from Additive Plus
- Additive Plus’s own A-Powder line — the same industrial AM-powder quality at an accessible, published price.
- Gas-atomized for high sphericity, low oxygen and consistent flow.
- Available in small, workable volumes — no large mill minimums.
- Full COA with every lot — PSD, chemistry, apparent density and flow rate, with a traceable lot number.
- Fast dispatch from Los Angeles. Need a tighter cut or a custom quantity? Just ask.
Standards & equivalents
- Made to the 17-4PH specification: ASTM A564 · UNS S17400 · AMS 5643 · AISI 630 · 1.4542
- Machine type: F — LPBF · Particle size: 15–45 µm · Bottle: 10 kg / 22 lbs
- Quality: gas-atomized for high sphericity and low oxygen; every lot ships with a full COA. (Additive Plus resells genuine A-Powder powder in small volumes.)
Chemical composition
Typical chemistry (wt%) for 17-4PH stainless steel:
| Element | Content | Element | Content |
|---|---|---|---|
| Iron (Fe) | Balance | Manganese (Mn) | ≤ 1.00% |
| Chromium (Cr) | 15.00–17.50% | Silicon (Si) | ≤ 1.00% |
| Nickel (Ni) | 3.00–5.00% | Carbon (C) | ≤ 0.07% |
| Copper (Cu) | 3.00–5.00% | Phosphorus (P) | ≤ 0.040% |
| Niobium + Tantalum | 0.15–0.45% | Sulfur (S) | ≤ 0.030% |
Heat treatment & processing
- Age-hardenable in a single, low-temperature step (e.g. H900) — choose the condition to tune strength vs. toughness.
- Forgiving to print on commercial LPBF systems; stress relief recommended before part removal.
- Readily machined and finished in the solution-treated and aged conditions.
Key performance benefits
- Good strength, toughness, hardness and ductility
- Excellent response to precipitation (age) hardening
- Good corrosion resistance in industrial environments
- Stable mechanical properties up to 600°F (316°C)
- Well suited for functional parts and tooling
Typical applications
- Functional and structural production parts
- Valves, fittings and manifolds
- Pumps and impellers
- Rapid tooling and fixtures
- Industrial and chemical-processing equipment
Material comparison: 17-4PH vs 15-5PH vs 316L
| Feature | 17-4PH | 15-5PH | 316L |
|---|---|---|---|
| Type | Martensitic PH | Martensitic PH | Austenitic |
| Strength & hardness | High | High | Moderate |
| Corrosion resistance | Good | Good | Excellent |
| Heat treatable | Yes (aging) | Yes (aging) | No |
| Magnetic | Yes | Yes | No |
| Typical use | Strong structural parts, tooling | High-strength parts | Corrosion-critical parts |
| Brand | AO Metal – High-Precision Metal 3D Printers for Innovation |
| Technology | Metal LPBF |
| Powder Package | 10 kg bottle, 440 kg hopper, 840 kg hopper |
| PSD (particle size distribution) | 15–53 micrometres |
| Printing Materials | Metal Powders |
| Material | 17-4PH |
| Country of origin | China |
| Production Method | Gas Atomization (GA) |
Don't see your spec?
We atomize our own. Custom variants on request.
Tighter PSD, modified chemistry, custom blend? Our ATO atomization lab runs custom batches in 3–4 weeks. Biocompatible, refractory, proprietary — all in-house, verified before ship.
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- ✓ Gas-atomized, low-oxygen — full COA on every lot
- ✓ Strong value alternative, sold in small workable volumes
- ✓ Fast dispatch from Los Angeles
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From process engineers running A-Powder 17-4PH Stainless Steel Alloy Powder for Metal 3D Printing | LPBF Compatible – 10 kg / 22 lbs
Unedited feedback from customers who reorder A-Powder 17-4PH Stainless Steel Alloy Powder for Metal 3D Printing | LPBF Compatible – 10 kg / 22 lbs.
★★★★★
Same lot 4 times in a row. We stopped re-running parameter sweeps after the second order — density was identical to the first build.
MK
Marcus K.
Process Engineer · Aerospace OEM
★★★★★
Asked about ferrite content on a Friday. A materials engineer answered Monday morning with actual data, not a sales pitch. That's why we keep ordering.
PS
Priya S.
R&D Lead · Medical Devices
★★★★★
COA matches the bottle. PSD and flow are exactly what was on the sheet — we run it on a Renishaw 500Q and it hits density on the first try.
DR
Diego R.
Production Lead · Energy
Common questions
Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What is 17-4PH Stainless Steel Alloy Powder?
A martensitic precipitation/age-hardening stainless steel powder for LPBF additive manufacturing, delivering ultra-high strength, corrosion resistance, and predictable mechanical properties for end-use components.
Which AM processes is it compatible with?
Optimized for LPBF (Laser Powder Bed Fusion), ensuring stable layer deposition, low spatter, and reproducible melt pool behavior.
Can the material be heat-treated?
Yes, heat treatment enables tailored mechanical properties, including ultimate tensile strength up to 1300 MPa, yield strength 1100 MPa, and hardness 43 HRC.
What is the corrosion resistance and operating environment?
Excellent corrosion resistance suitable for aerospace, defense, industrial, and automotive applications.
Which industries typically use 17-4PH?
Aerospace & Defense, Industrial Machinery, Automotive & Transportation, Energy & Power Generation.
Why choose this powder over other stainless steel powders?
Provides ultra-high strength, predictable LPBF printing, heat-treatable properties, and is backed by AO Metal’s consistent quality, small-batch flexibility, fast delivery, and full documentation.
Is A-Powder the same quality as name-brand metal powders?
Yes. A-Powder is our own brand of industrial AM powder - gas-atomized for high sphericity and low oxygen, with a full Certificate of Analysis (chemistry, particle-size distribution, apparent density and flow rate) on every lot. You get the performance you expect from a premium feedstock, at a more accessible, published price.
Can I order a smaller quantity or a custom particle size?
Yes. We sell in small, workable volumes with no large mill minimums, and we can supply custom particle-size cuts or quantities on request - just ask us for a quote.
Place your order, or talk to an engineer first
Order A-Powder 17-4PH Stainless Steel Alloy Powder for Metal 3D Printing | LPBF Compatible – 10 kg / 22 lbs direct, or talk to materials engineer