Stainless Steel Powder for Additive Manufacturing

Your guide to the four stainless grades that cover most AM demand: 316L, 304L, 17-4PH and 13-8Mo. Compare compositions, corrosion behavior, particle-size specs, pricing based on PS Price Index data, and find verified Chinese manufacturers.

Request Stainless Steel Quotes → Browse Stainless Steel Products

¥30–100

316L EXW Price (CNY/kg)

15–53µm

Typical LPBF PSD

VIGA

Production Method

<600 ppm

Oxygen Target (316L)

1. Stainless Grades — Choosing the Right Alloy

Stainless steel is the volume workhorse of metal additive manufacturing: it prints easily on every mainstream LPBF machine, costs less than titanium or nickel alloys, and covers applications from general engineering to medical tooling. The four grades below span the practical spectrum — two austenitic (316L, 304L) and two precipitation-hardening (17-4PH, 13-8Mo).

Grade	Type / Strengthening	Key Feature	Price (CNY/kg)	Primary Applications
316L	Austenitic (Cr 16-18 · Ni 10-14 · Mo 2-3)	Best chloride pitting resistance, easiest print	¥30–100 (15-53µm)	General engineering, marine, food & chemical, medical
304L	Austenitic (Cr 18-20 · Ni 8-12 · C ≤0.03)	Weldability + intergranular corrosion balance, lower cost	Below 316L band	Structural parts, chemical piping, food/pharma equipment, MIM
17-4PH	Precipitation hardening (Cr 15-17.5 · Ni 3-5 · Cu 3-5)	High strength after H900 aging	Request quote	Aerospace brackets, molds, marine shafts
13-8Mo	Precipitation hardening (Cr 12.25-13.25 · Ni 7.5-8.5 · Mo 2-2.5 · Al 0.9-1.35)	PH strength with better toughness than 17-4PH	Request quote	Aerospace structural, high-strength tooling

💡 PS Price Index Data (2026): 316L 15-53µm mainstream band is ¥30-100/kg with a median of ¥55-65/kg (supplier quotes, non-transactional, 30-day display delay). 304L carries no molybdenum and is typically priced below the 316L band. For 17-4PH and 13-8Mo, volumes are thinner — always request quotes with your target particle-size cut.

2. Critical Quality Factors for Stainless Steel Powder

Oxygen Content: Below 600 ppm is the widely accepted standard for printing-grade 316L/304L. Lower oxygen improves mechanical performance and surface finish; check the certificate rather than the sales sheet.

Carbon (L grades): 304L/316L must actually meet C ≤0.03%. The low carbon suppresses chromium carbide precipitation during print thermal cycles — verify the measured value, not just the grade name.

Sphericity & Flowability: VIGA gas-atomized spherical powder with Hall flow under 20 s/50 g is standard. Water-atomized powder costs less but prints worse and carries more oxygen.

Certification: Require a mill test certificate with full chemistry per ASTM F3184 / ASTM A240, particle-size distribution, oxygen content and Hall flow. For 17-4PH, confirm the aging condition (H900/H1025) your supplier's data references.

3. Applications by Grade

Stainless AM parts fall into four broad families. Match the grade to the failure mode — corrosion type (pitting vs intergranular), strength requirement, or heat treatment route.

Marine & chemical equipment: 316L — the molybdenum content resists chloride pitting where 304L would fail.
General engineering & food/pharma: 304L — the economical default when chlorides are absent; low-carbon welding behavior suits piping and vessels.
High-strength structural: 17-4PH after H900 aging reaches martensitic strength levels while keeping useful corrosion resistance.
High-strength + toughness: 13-8Mo delivers PH strength with better ductility and K1c than 17-4PH — the choice for demanding aerospace brackets.

4. China vs Global Supply

Chinese VIGA producers now supply the majority of global 316L/304L AM powder volume. The EN-site 316L grade page documents EXW quotes around ¥30-100/kg from Chinese producers against roughly $25-60/kg international bands — a substantial EXW advantage for buyers who can handle logistics and verification themselves. The pattern per grade:

Dimension	China	Global
316L/304L powder	VIGA volume production, mature export	Established certified supply (Oerlikon, Sandvik, Carpenter)
17-4PH	VIGA + water atomization, growing AM volume	Mature aerospace certifications (AMS 5604 plate heritage)
13-8Mo	Smaller AM powder volumes, project-based	Aerospace-qualified supply (AMS 5864)
Certification depth	MTC standard; aerospace qualifiers fewer	Longer certified-service history for flight parts

5. Patent Landscape (selected public filings)

Recent Chinese patent activity on AM stainless steel reflects where domestic R&D is heading — cleaner 316L for semiconductor equipment, anisotropy control in SLM, and corrosion upgrades. Public patent database, for technical reference only:

CN122648831A — Ultra-pure 316L austenitic stainless steel for semiconductor equipment (Zhejiang Tsingshan Steel, 2026, under examination)
CN122517648A — Directionally coupled control of SLM 316L anisotropy (Chongqing University of Technology, 2026)
CN122588469A — Nano-NiAl strengthened high-aluminum 316L for molten-salt corrosion (Lanzhou University of Technology, 2026)
CN122588467A — 304L with Ni/N ratio-controlled low-temperature toughness (Central Iron & Steel Research Institute, 2026)

6. Buying Checklist

✓ Confirm measured carbon (≤0.03% for L grades) and oxygen (<600 ppm) on the mill certificate.
✓ Match the particle-size cut to your machine: 15-45/15-53µm for LPBF, 53-150µm for DED.
✓ For 17-4PH/13-8Mo: state the aging condition (H900/H1025, H950) you will use and require matching mechanical data.
✓ Ask for a printed coupon density test before volume orders — chemistry alone does not predict printability.
✓ Compare total landed cost, not EXW price alone; stainless powder ships easily but order size changes freight economics fast.

Frequently Asked Questions

Is 316L or 304L the better default for AM?316L if the part may see chlorides (marine, chemical); 304L if the environment is benign and cost is the priority. 316L is the global AM default for a reason — it prints as easily and costs only slightly more.

Why do 17-4PH prices vary so widely between suppliers?Because the aging condition (H900 vs H1025), the particle-size cut and the certification package all move the price. Compare quotes with identical cut and conditioning, and check the mechanical data reference state.

Can one supplier cover all four grades?Most large Chinese VIGA producers offer 316L, 304L and 17-4PH from stock; 13-8Mo is usually produced to order. Consolidating orders improves pricing and freight efficiency.

Compare verified stainless steel powder suppliers

Submit one RFQ and receive quotes from multiple verified manufacturers, usually within 24 hours.

Get Quotes Now →